Ch 1 1101
What three components of a mobile display are often connected in such a way that if one fails, you must replace the other two with it? (Choose three.)
A, B, D. The digitizer on a mobile device is a thin layer of electronic material that is glued or fused onto the back of the glass. Popular new smartphones are fusing all three together, so if the ability to communicate with the smartphone through touch fails, you must replace not only the digitizer but the glass cover and LCD (Liquid Crystal Display) as well. If the glass cover shatters, then the digitizer and LCD are replaced as well because it is sold as one unit. The Wi-Fi antenna is usually a discrete part inside the case.
You're configuring a new laptop for a user. What devices can you plug into the port shown here? (Choose two.)
A, B. This is an audio output port and can be used to connect either speakers or headphones. A microphone can use a port that looks the same but is color-coded pink.
A coworker is having a problem with their laptop and has asked you to fix it. When an external keyboard is plugged in, the laptop works just fine, but without it strange characters appear on the screen when typing. Which of the following
A, B. Users should be discouraged from eating cookies or toast (or anything) over their laptops. Fine crumbs or other debris can cause keys to stick, but that likely wouldn't cause the type of problem the user is experiencing. Oftentimes a laptop keyboard can be replaced fairly easily assuming a compatible one can be found, but in this case, the problem is most likely caused by a loose ribbon cable connecting the keyboard to the motherboard, or a corrupted driver.
The AC adapter for your laptop is not working properly, and you are searching for a replacement. Which two factors should be most important when selecting a new AC adapter? (Choose two.)
A, B. You should choose an AC adapter rated for the same wattage as the original. You must also pay special attention to the voltage and polarity of the plug that interfaces with the laptop. If the laptop requires the positive lead to be the center conductor, for instance, then you must take care not to reverse the polarity. It's best to find one that advertises compatibility with the device it will be charging.
You've been asked by the company president what can be done with NFC in addition to paying for coffee. What will you tell them? (Choose three.)
A, C, D. NFC can do so much more than pay for your coffee. In addition to the answers above, NFC tags can be set up to automate tasks instead of manually changing settings, such as silencing an alarm or logging into a PC. In some places they can allow your phone to be your bus pass. They're considered secure for communication because of the short distance between devices.
You're going hiking this weekend in unfamiliar territory and have installed an application on your phone that shows you where you are on the map in relation to the trails and surrounding areas. What two types of location technology might this app use? (Choose two.)
A, C. Both GPS and cellular location services can be used to pinpoint the location of any device on Earth that has a GPS receiver or cellular service. GPS finds your location by pinging satellites whereas cellular location services use two or more cell phone towers. MDM is a type of data security for mobile devices, and RFID is radio frequency ID, which is often used for inventory management.
Which of the following is not a type of LCD?
A, D. Smart cameras have built-in wireless network connectivity for easy picture and video transfers. Many will include Wi-Fi, Bluetooth, and NFC (Near-field Communication). IrDA uses infrared light for communication and is not popular, and RJ-45 is a type of networking connector.
You need to replace a failed SATA hard drive on a 10-year-old laptop. The user has asked that the new drive be as fast as possible, regardless of disk space or cost. What type of drive should you install?
A. A solid-state drive (SSD) uses the same memory technology found in other forms of flash memory. They are much faster than traditional magnetic drives or hybrid drives but generally don't have as much capacity for the same price. An NVMe drive is newer technology and would have to be supported by the laptop. It also uses a different connector.
The owner of a company that solely provides transportation from the airport to various hotels wants to employ a software that will tell them where every vehicle is at all times. All of the vehicles use satellite-based navigation systems. What technology is most likely being used to track where they are?
A. Any device that has a GPS receiver has the ability to ping satellites, which will correspond with at least two others to triangulate the position of the device, and they are quite accurate. (A fourth satellite is needed to determine elevation.) This is a common way for devices to provide turn-by-turn directions. While cellular location services work the same way, that wouldn't be the answer unless the vehicle has its own cellular service. MDM and MAM are methods of data security in a corporate environment.
You are purchasing a mobile device that allows you to use multi-finger gestures to interact with the device. What type of touchscreen technology does this device most likely use?
A. Capacitive touchscreens are a little less accurate than resistive touchscreens but more responsive. They respond to changes in electrical current, and as such, the human fingertip works great as the facilitator of input. Resistive screens require a heavier touch and don't support multi-touch input. Infrared screens don't work with multi-touch gestures, but like resistive screens, they can be used with gloves on. Surface Acoustic Wave (SAW) is another type of touchscreen, but it is not popular.
You're the IT manager for a manufacturing company. One of the corporate executives is questioning why you're buying serial instead of parallel devices. You explain that serial transmits only one bit of information at a time, but it does so very fast compared to parallel. Which of the following will you tell them is not a serial connection?
A. Centronics is a common name for a parallel port. Parallel ports are now legacy because serial communications are so much faster. Thunderbolt, Lightning, and USB-C all use serial communications, and they are very fast.
Which mobile connection type allows you to share your cellular Internet connection with a Wi-Fi enabled device?
A. If you have a cellular-enabled device such as a smartphone, you may be able to turn that phone into a mobile hotspot. By doing so, you can share your cellular Internet connection with Wi-Fi-enabled devices such as laptops and tablets. Near-Field Communication (NFC) devices can communicate and send data and files but only if they are within inches of each other. Bluetooth is a common wireless technology for connecting devices such as keyboards and headsets to a computer, and IrDA (infrared) communicates using light, but requires a line-of-sight.
You're configuring company email on a coworker's phone. The company needs to keep a copy of every email on their server, even after it's accessed by the user. Which mail protocol keeps all emails stored on the server, allowing messages to be synchronized between multiple devices?
A. Internet Messaging Access Protocol (IMAP) keeps a copy of emails on the server. This allows someone to view and work with their email from more than one device. SMTP (Simple Mail Transfer Protocol) is a protocol for sending (not receiving) mail. POP3 (Post Office Protocol 3) downloads mail to a device and does not leave a copy on a server. Once downloaded, mail can only be read on that device. S/ MIME (Secure Multipurpose Internet Mail Extensions) is an encryption standard for securing email.
You are upgrading a laptop with a Mini PCIe card. What type of connector does Mini PCIe use?
A. Mini PCIe cards use a 52-pin connector. The Mini PCIe cards are 30 mm wide and come in full length (50.95 mm) and half length (26.8 mm). 68-pin connectors are used with SCSI devices, whereas 144-pin and 200-pin are SODIMM connector sizes.
Which type of mobile device is known for using electrophoretic ink?
A. Most e-reader displays use a technology called electrophoretic ink, or E Ink, which is a proprietary type of electronic paper. Although E Ink is available in color, many consider its best applications to be in grayscales or pure black and white. Additionally, E Ink uses almost no power to keep print on the page until the print is changed.
Your friend wants to be able to use their phone to pay for purchases at a popular coffee shop. They noticed that the phone needs to be about 4″ from the coffee shop's reader. What radio wave communication type do you need to configure for your friend?
A. Near-field communication (NFC) is a wireless technology that uses radio frequency (RF) signals with limited range, about 4″ (10 cm). Bluetooth and Wi-Fi have greater ranges, and IrDA uses infrared light and requires line-of-sight communications. IrDA is no longer popular.
Which of the following is not a type of LCD?
A. OLED technology uses organic material that lights up and creates colors without the use of backlighting or an LCD (Liquid Crystal Display). IPS, TN, and VA are all types of LCDs.
What technology lets you minimize how often a user must log in for multiple services?
A. Single sign-on (SSO) is the authentication feature of users logging into their device, which in turn uses their authorization and credentials to authenticate to other systems or services. This is implemented through Active Directory (AD) or another centralized service that could store a user's privileges. Since the user was authenticated through the service (like Active Directory) and that service is trusted by the other software, the user is not required to log into the other software. SMTP is a protocol for sending email, synchronization means updating between systems, and nonrepudiation is proof of delivery or access such that a party can't later say they didn't access or see something. Nonrepudiation is a principle of information security.
You have been asked to purchase a new camera for the company photographer. Some of the cameras are marketed as “smart†cameras. What key feature does this likely mean the camera includes?
A. Smart cameras have built-in wireless network connectivity for easy picture and video transfers. Many will include Wi-Fi, Bluetooth, and Near-Field Communication (NFC). Smart cameras, such as security cameras, can also connect via Wi-Fi to your network and the Internet, and can thus be accessed and controlled by a cell phone.
What is this device, which can be found inside an iPhone 10 along the bottom, connected with a small ribbon cable?
A. Smartphones will have both a cellular antenna and a Wi-Fi antenna internal to the phone. Typically they connect with a ribbon cable, and they may be shaped differently or in different places depending on the particular cell phone model. These are not considered user-replaceable parts, but as an IT technician, you may be asked to replace them. Special tools, often plastic, may be needed to open a cell phone case without causing damage. The digitizer is a thin layer of electronic material that is usually fused between the glass and the LCD. Haptics are the ability of the device to interact through touch, such as vibration when they ring or feeling like you're pressing a physical button even though you're not. Stylus sensors are not actual devices.
What best practice can save someone from losing the data such as calendar entries and contacts on their mobile device if the device is lost?
A. Synchronization means to duplicate or back up the data from the device. Synchronization can be done to the local desktop, to the cloud service off premises, or even to an automobile. A VPN (virtual private network) uses encryption protocols to safeguard communications across a shared transmission medium (like the Internet) and mimics the network connection you would have if you were in the same building as your server. Encryption is using algorithms to change data so that it can't be read by unauthorized people or devices, thus protecting your data and logins. Updating is a generic term for modernizing and adding features to something.
When two parents wish to share appointment dates and times between devices, what is their best option?
A. Synchronizing calendars between devices and users is an easy and reliable option for ensuring that all parties have the same information.
What type of update is done to mobile devices over the air?
A. The Preferred Roaming List (PRL) and Product Release Instructions (PRI) deal with how your phone connects to the correct mobile tower and network. Updates to this information on the phone is typically done over the air. Your IMEI (International Mobile Equipment Identity) and IMSI (International Mobile Subscriber Identity) and screen resolution can't typically be changed. IMEI identifies the exact device, and IMSI uniquely identifies the account holder.
What is the likely type of Wi-Fi antenna connector you will find as an external connector on a laptop?
A. The overwhelming majority of Wi-Fi antenna connectors for indoor-rated antennas found on laptops are type SMA (SubMiniature version A). On the device will be an SMA-female. What makes a connector â € œmaleâ € is the center pin and threads on the inside, while a â € œfemaleâ € connector will have a receptor for the pin and threads on the outside. RP (reverse polarity) means that the pin and receptor are in opposite positions with regard to connector gender while the outside housing remains the same. SMA-RP and SMA are therefore not compatible with each other. N-type connectors look similar but are weatherproof and larger than SMA connectors.
What port looks identical to a Thunderbolt 3 connector but will not charge a connected device as quickly?
A. USB-C uses an oval port that looks identical to Thunderbolt 3, and both can be used to transfer data and power to a device, but Thunderbolt 3 does it much faster, at 40 Gbps. To tell them apart, look for the lightning bolt on a Thunderbolt cable or port.
ou are configuring the mail app on an iPhone to use an Outlook.com email address. What configuration information do you need to enter to establish connectivity?
A. When configuring a mobile email client to access a commercial email provider, you typically just need your username and password to establish connectivity. Examples include Google, Yahoo, Outlook.com, and iCloud.
Your boss has asked you to maximize the RAM in their laptop computer. You check the specifications and discover that the maximum system RAM is 32 GB of DDR4 RAM. The laptop currently has 16 GB onboard RAM and one empty slot. Which of the following RAM modules will you purchase?
A. You will always check the device's documentation before purchasing components to ensure compatibility. In a laptop, RAM is often soldered directly onto the motherboard (onboard) and isn't meant to be replaced by most users. Since the maximum system RAM is 32 GB, you would need one 16 GB RAM module to bring it up to that total. The SO in SODIMM stands for Small Outline and is the type of RAM module used in devices like laptops and sometimes printers. DIMMs (Dual Inline Memory Modules) are used in desktop computers.
An artist in your company's marketing department just received the new drawing pad that they ordered. What might you need to do to configure it? (Choose three.)
B, C, D. Some drawing pads simply plug into the USB port of a laptop and they work just fine. Higher-end devices will likely need more setup but will pay off in quality. Some will need special software installed, including drivers, and that software will need to be configured. Most likely you'll want to enable and configure Windows Ink. You may need to calibrate a drawing pad when you first connect it or only if the movement of the stylus is off from the movement on the screen. It's unlikely that you'll need a different operating system to use it.
Your boss has asked you to make sure that each of the company's laptops has a biometric scanner as an extra measure of security. Which of the following are biometric devices that are commonly found and can be configured on laptops? (Choose two.)
B, C. Biometrics are using part of your body to identify you. An ID card is not biometric. Retina scanners are used in some secure environments but are not commonly found on laptops, but facial recognition like Apple's Face ID and Windows Hello are on most modern laptops. Fingerprint readers can be found on many laptops, or can be easily added.
How do modern docking stations connect to laptops? (Choose two.)
B, C. Legacy docking stations would have a proprietary port that would align with a connector, usually on the bottom or back of a laptop. The docking stations would be proprietary, meaning they can only work with specific equipment. Modern docking stations connect with the fast USB-C or Thunderbolt ports, and sometimes USB-A ports. They often supply their own power and can make a laptop seem like a desktop by plugging in one cable that connects your laptop to multiple monitors, gigabit Ethernet, audio, or almost any other port type. Docking station can also mean a charging cradle for a smartphone or tablet to plug in vertically that provides other functions such as built-in speakers for music playback or a clock. Two examples are Android Radio and Music Dock or Apple's Universal Dock.
Which two components of a laptop or other mobile device are the most useful when making a videoconference call? (Choose two.)
B, C. Webcams are nearly universal on laptops. The most common placement is right above the display on the laptop. Microphones are also often built into the display, next to the webcam. Both laptops and mobile devices such as smartphones are used for videoconferencing. Desktop computers can be used for videoconferencing, too, but usually will require adding a webcam and microphone. A digitizer converts touch input into digital format, and an inverter is used to convert DC (Direct Current) to AC (Alternating Current).
A laptop user wants to have a full-sized display and keyboard, as well as an external hard drive, and speakers available to them at their desk. Which accessory can they purchase to avoid plugging each of these devices separately into their laptop every time they return to the desk? (Choose two.)
B, D. A docking station often replicates the functions of the ports on the back of a laptop so that peripherals such as displays, keyboards, printers, and so on that don't travel with the laptop can remain connected to the dock and don't all have to be unplugged physically each time the laptop is taken away. Docking stations effectively turn a laptop computer into a desktop computer, and the docking station may offer its own devices, such as an optical drive and speakers. It may have a generic connector such as USB-C or a proprietary connector. Docking station can also mean a charging cradle for a smartphone or tablet to plug in vertically that provides other functions such as built-in speakers for music playback or a clock. Two examples are Android Radio and Music Dock or Apple's Universal Dock. This differs from a port replicator, whose main function is to let the user connect several devices at once and doesn't require the laptop to be connected to offer connectivity between the devices. A KVM switch enables you to use one keyboard, video device, and mouse (hence the name, KVM) with two or more system units. Desktop station is not an actual term.
You will be traveling to another country for work and will have a 10-hour airplane flight. You need to work on your laptop while on the flight, but your battery won't last that long. What should you buy to allow you to use the auxiliary power outlets on the airplane?
B. A DC power adapter allows a user to plug the laptop into the DC power source (usually called an auxiliary power outlet) inside a car or on an airplane. AC power adapters are for plugging into standard wall outlets. Some airplanes now provide AC power outlets to their passengers as well.
What type of wearable technology device is specifically designed to track a user's movements and heart rate and may include features such as GPS?
B. A fitness monitor is normally worn on the wrist, and it tracks a user's movements and heart rate. Some fitness monitors will be able to track sleep patterns and have a clock, alarm, and other features such as GPS. All fitness monitors have the ability to sync to a device such as a smartphone, laptop, or desktop.
A user needs ports for external devices in addition to what their laptop is capable of connecting. The user would like these devices to have connectivity with each other whether or not the laptop is there. Which of the following will provide that option?
B. A port replicator is an attachment that provides the same ports as or additional ports to a laptop. The devices can communicate with each other via the port replicator whether or not the laptop is there. Docking stations are similar to port replicators because they provide a single connection to a laptop that will connect several devices, but the point of the docking station is to effectively make a laptop function as a desktop PC. Whereas a docking station may (or may not) be a proprietary device, a port replicator is not, and will generally provide a connection to the external devices via a USB or similar port. Docking station can also mean a charging cradle for a smartphone or tablet. KVM switches allow multiple system units to share a keyboard, video and mouse. Docking port is not an actual term.
What Windows app is used to synchronize data between a user's mobile devices like smartphones and their desktop computers?
B. ActiveSync was developed by Microsoft to make synchronization of data easier and allow users to access their data even when they're not online
In which scenario would you use the Fn key and the F4 key shown here?
B. Because of the much smaller space available for keys, some laptop keys are consolidated into. special multifunction keys. These keys are accessed through the standard keys by using a special function (Fn) key. Nearly every laptop has a video connector on the back or the side to plug in an external display or a projector. You will need to use the video toggle key to get this external port to work. This is done by pressing the Fn key and the video toggle key simultaneously.
Of the laptop components listed, which one is least likely to be built into the display?
B. Common components to include in the display are the screen, Wi-Fi antenna, webcam, microphone, inverter, and digitizer. Speakers are often near the keyboard on a laptop; however, some desktop displays have built-in speakers.
Which mobile device component can take input from a stylus or your finger, depending on the sensor type, and convert it into an image on the laptop or other mobile device?
B. Common components to include in the display are the screen, Wi-Fi antenna, webcam, microphone, inverter, and digitizer. Speakers are often near the keyboard on a laptop; however, some desktop displays have built-in speakers. Digitizers may be built into laptop and mobile device displays, or they can be separate devices that connect to a computer via a USB or other cable. Touchpads and pointing sticks convert your finger movement to mouse movement on the display. An inverter is used in CCFL displays to convert DC to AC.
What is the hosted messaging version of Microsoft's Exchange mail server that saves customers email off-site?
B. Exchange Online is the cloud service version of Microsoft Exchange and part of Microsoft Office 365..
Your new laptop has 4 GB system RAM and an integrated video card. The default setting specifies 512 MB of video memory. How much RAM is available for the processor to use?
B. Many laptops use shared video memory, meaning that system RAM is divided up for use between the processor and the video card. On these types of systems, the amount of RAM available for video is configured in the BIOS/ UEFI. Anything reserved for the video card is unavailable to the processor. In this case, subtracting half a gigabyte from 4 GB leaves the CPU with 3.5 GB.
Which type of smartphone display has fewer layers, providing more flexibility, a better viewing angle, and excellent color as compared to other technologies?
B. Many newer smartphones are boasting OLED displays for their light weight, flexibility, color depth, and wider viewing angle. IPS is a popular type of LCD (Liquid Crystal Display) that requires backlighting to display the image. TN was the LCD technology developed first. It uses less power and has a limited viewing angle, but it supports very fast refresh rates. LEDs can be used as the backlight for LCD systems. OLED displays don't need a backlight because their carbon-based material can emit light and color.
You are on the phone talking to a technician who is trying to upgrade a laptop. The technician is having trouble identifying the Mini PCIe card. How wide should you tell the technician that the card is?
B. Mini PCIe cards come in two sizes. The full-size cards measure 30 mm wide and 51 mm long. Half-size cards are 30 mm wide and 27 mm long.
A coworker just started working with their new laptop yesterday, and today they're complaining that the trackpad won't work. You suspect that they accidentally turned it off. What key or key combination based on the graphic will remedy the problem?
B. Most keyboards will have an Fn (function) key used in combination with the F keys across the top to perform various tasks. In this case, the user likely accidentally turned off the trackpad, also called a touchpad. We know that F9 is the trackpad button because the graphic shows the pad with the two mouse-click areas on the bottom.
You are wearing your smart watch, which allows you to make payments like a credit card. What type of connection technology does this service use?
B. Near-field communication (NFC) is a wireless technology that uses radio frequency (RF) signals with limited range, about 4″ (10 cm). NFC can operate in card emulation mode, which lets the device act as a smartcard. This is useful for making payments at the site of a merchant who uses NFC. Bluetooth is a popular protocol for personal area networks (PANs) such as a laptop and headset or speakers. Wi-Fi is used for wireless Local Area Networks (LANs). IrDA uses infrared light for communication; although it was once popular, it is rarely used in PC communications.
Your company is producing posters for an upcoming public relations campaign. The project leader wants to embed information into an NFC Type 4 tag in the poster. How much information can this tag hold?
B. Near-field communication (NFC) is a wireless technology that uses radio frequency (RF) signals with limited range, about 4″ (10 cm). To read an NFC tag in a poster, you would move your phone close to the tag. The phone would generate a small RF field that would power the tag, and data could then be read from the tag. There are five types of tags that vary in speed from 106 kbps to 2424 kbps and in maximum capacities from 2 KB to 32 KB. Type 4 holds the most data but is slower than Type 3.
You're upgrading the Wi-Fi card in a manager's laptop and notice that the antenna cable is frayed, so you need to replace that too. What will you likely need to do to replace the antenna?
B. Often in laptops, the antenna is housed in the display area of the laptop. You would most likely need to separate the display from the laptop's motherboard section to open it and replace the antenna cable. It will also likely have two different parts, a right and a left antenna, so make sure you get the right one.
In which scenario would you use the Fn key and the F10 key?
B. Some laptop keys are consolidated into special multifunction keys to save valuable space. These keys are accessed through the standard keys by using a special function (Fn) key. Video adjustments come in two varieties: changing the video output and dimming or brightening the screen. In this case, there is a large sun icon for brightening the screen on the F10 key, so pressing the Fn key and the F10 key simultaneously would increase the brightness. Some laptops use a smaller sun to label the key for dimming and a larger sun to label the key for brightening, or they use plus and minus signs or up and down arrows next to the suns. You may also see special function keys to turn network connections on or off or to play, fast-forward, or rewind media.
What type of connection are you using if you use a USB cable to connect your laptop to your cell phone in order to use the cellular wireless connection from the laptop?
B. Tethering is connecting a device to a mobile hotspot. The term used to be reserved only for when you were connected via USB cable, as opposed to connecting via wireless. Some devices will not function as a mobile hotspot but will allow you to tether a mobile device to it with a USB cable so that the mobile device can share the cellular Internet connection.
Which unique mobile number identifies you as a user and is coded into the SIM card if you're on a GSM network, or otherwise linked to your account, allowing you to transition from one phone to another?
B. The International Mobile Subscriber Identity (IMSI) is a unique number that identifies you, the user, to the cellular service. If you're on a GSM network, it is on your SIM card and can easily be transferred from one phone to another. If you're on a CDMA network, you must transfer from one phone to another by activating the phone on your account. The International Mobile Equipment Identity (IMEI) is a unique number assigned to the physical phone. This unique identifier is hard-coded into the device. The Product Release Instructions (PRI) describe how your device connects to the network, and a MAC (Media Access Control) address uniquely identifies a network interface card.
What type of mobile device connector is shown here?
B. The connector shown is the Apple Lightning connector used by iPhones since the iPhone 5.
The company president misplaced their charging cable for their iPhone 13. You tell them it's no problem, and hand them a new one. What type of connector does this iPhone use for charging?
B. The iPhone 13 series uses the proprietary connector called the Lightning connector. They can also use a compatible wireless charging pad.
What type of connectors are the two shown in the center here?
B. The two center connectors are Thunderbolt connectors. They have the characteristic lightning bolt icon. Thunderbolt is an offshoot of DisplayPort technology and supports many types of peripherals.
You've been handed a device to install. The cable looks like the one here. What type of connector does this device use?
B. There are several different types of USB connectors. The one shown here is a miniUSB.
One of your coworkers has purchased an external Bluetooth trackpad to use with their tablet. They've turned to you, the company IT person, to install and configure it for them. What actions will you need to take? (Choose two.)
C, D. Configuring a new Bluetooth trackpad is a fairly simple procedure. You first need to pair the device with the tablet, then configure it for speed and clicking and such. The CompTIA A + objectives list the steps for connecting Bluetooth devices as follows:
What type of connector is used on Android smartphones? (Choose two.)
C, D. Older Android devices used the USB Micro-B connector, while newer Android smartphones use the USB-C connector. Lightning is the connector used by iPhones, and Thunderbolt has a connector whose shape looks identical to a USB-C, but Thunderbolt is much faster.
Your customer has an iPhone 8 and wants to read and write NFC tags with it. What advice will you give them? (Choose two.)
C, D. The only Near-field communication (NFC) capability with devices prior to the iPhone 7 is the ability to use Apple Pay; however, with iPhone 7 and newer devices, a third-party app can be used to read and write NFC tags. iPhone 12 and newer devices can natively read NFC tags.
You have recently purchased a laptop computer with a touchscreen. It allows you to draw images on the screen and save them on the computer. Which device is responsible for converting the input into the image that you see and save?
C. A digitizer is a device that can be written or drawn on and the content will be converted from analog input to digital images on the computer. Digitizers take input from a user's finger or a writing utensil, such as a stylus. Touchscreen devices and touchpads have a digitizer built into them. An inverter changes DC (Direct Current) to AC (Alternating Current) and is needed for some types of backlighting.
You are using a public Wi-Fi hotspot and believe that someone is trying to hack into your laptop. Which laptop feature should you use to immediately turn off all wireless connections?
C. Airplane mode turns off all wireless connections on a mobile device. It's common on phones and tablets, and most laptops have the feature as well.
A technician needs to replace a failed laptop hard drive. Which of the following form factors could it use?
C. An older laptop hard drive will be one of two form factors (sizes): 1.8â € ³, which is now considered legacy, or 2.5â € ³. Modern laptops most likely use either mSATA or M. 2 drives, which are thinner than a RAM module and much smaller. Desktop computers have historically used 3.5â € ³ hard drives.
What service is built into Apple-developed devices and permits users and subscribers to store documents, media, and contact information off their devices?
C. Apple's cloud service called iCloud is for users and subscribers to store their media, contacts, and so on. OneDrive is Microsoft's online cloud user storage.
You have enabled the GPS service in your tablet. What is the minimum number of GPS satellites your tablet needs to be in contact with to determine its location?
C. GPS systems were designed to require multiple satellites. Receivers use a process called triangulation, which they use to calculate the distance between themselves and the satellites (based on the time it takes to receive a signal) to determine their location. They require input from four satellites to provide location and elevation or three to provide location.
You're working from a home office and need to be able to type on your keyboard while talking with clients, so you purchase a wireless headset. What wireless technology will you need to enable on your laptop to ensure that the headset and laptop can communicate?
C. Headsets are used for hands-free phone conversations and listening to music. Headsets can either plug into the speaker/headphone jack or be wireless. Most wireless headsets are Bluetooth. Wi-Fi is for connecting to wireless Local Area Networks (LANs). IR is infrared communication, which uses infrared light and requires line-of-sight for connections. It is seldom used. NFC (near-field communication) only works over very short distances, about 10 cm or 4″.
You're working as the IT support person at an accounting firm. One of the accountants dropped their keyboard, and the number 5 key is no longer there. This is a critical problem for an accountant. What is the most cost-effective way to get them up and running again?
C. Individual keys can be replaced on a laptop. If your company uses many of the same model of laptops, keeping one or two nonfunctioning ones in stock for parts is helpful. If a key is not readily available, they can be purchased from third-party vendors for much less than an entire keyboard. When ordering, ensure that it has the right type of clips, hinges, and possibly cup for the model being replaced. Is the short term, an inexpensive USB-connected keypad might suffice.
A warehouse manager at a factory is required to supervise productivity while walking around and taking notes. They find their laptop awkward to type on while walking but do not want to use two devices. What would you recommend they do?
C. Laptops with a rotating or removable screen allow the touchscreen to function like a tablet. This allows the warehouse manager to take notes with a tablet while keeping the laptop for their desk.
Your customer brought you a laptop with an internal battery that will no longer charge. You have told them that replacing the battery will be no problem at all. Which of the following will you need to do first?
C. Legacy laptops may have a battery that is removable and replaceable by sliding a connector or removing a few screws from the back of the case, but you might not be able to find a compatible replacement. Modern laptops have internal batteries. Before removing the back (bottom) cover of the laptop to get to the battery, you must disconnect the power to avoid getting shocked or damaging the laptop. You'll also want to be certain that you can purchase a compatible battery both in features and size/shape. Most do not require you to remove the keyboard or LCD panel to reach the battery, but again before doing either of those, the power should be disconnected, and you will have researched the laptop.
What component or characteristic on most mobile phones has its ability measured in megapixels?
C. Megapixels are a measure of how many unique points a digital camera is capable of storing. It's more a measure of detail than quality, but for most of us it's a quick way to compare a smartphone's photographic capabilities. Brightness and contrast are settings that affect the display, whereas the digitizer accepts analog input and converts it into digital format.
You're upgrading a user's laptop from 802.11n to 802.11ac. What port will you most likely use inside the laptop?
C. Mini PCIe is just for small devices like laptops. PCI and PCIe are found on desktop PCs. PCIe x16 (x16 is pronounced as by 16) is often used for video at blazing speeds. PCIe x1 is popular for all sorts of devices. There is no Mini PCIe x16.
Which type of LCD has the best contrast, meaning the darkest black and lightest white?
C. OLED (Organic LED) monitors are not LCD (Liquid Crystal Display) monitors. Each of the other three has their advantages. TN (Twisted Nematic) displays have the fastest refresh rates, IPS (In-Plane Switching) displays have the best viewing angle, and VA (Vertical Alignment) displays have the best color contrast.
You're configuring private email on a coworker's cell phone. They want to make sure all of their mail will be only on their phone. Which mail protocol keeps all emails stored on a single device and can only be accessed from one device?
C. POP3 (Post Office Protocol 3) keeps emails stored on one device. This means both sent and received messages are stored on that one device, so all email is accessed from that device. The IMAP (Internet Message Access Protocol) downloads mail but leaves a copy on the server. SMTP (Simple Mail Transfer Protocol) is a protocol for sending (not receiving) mail. S/ MIME (Secure Multipurpose Internet Mail Extensions) is an encryption standard for securing email.
Which type of network connection is least likely to be found on a tablet computer?
C. RJ-45 is an 8-pin connector commonly used to connect computers to a local area network (LAN). Tablets are designed for mobile communication. As such, most tablets come equipped with Wi-Fi and Bluetooth, and many have cellular capabilities as well.
Tablet computers feature touchscreens that are approximately what size?
C. Tablet screen sizes typically fall anywhere between 7â € ³ and 12â € ³, although you can find much larger ones with 24â € ³ displays.
What is the name of the OS used by the Apple Watch, which was designed specifically for the watch?
C. The Apple Watch uses watchOS. It's similar to iOS (used on iPhones) but was developed specifically for the watch. Its features are similar to iOS, but it includes features more tailored toward a smaller device. There is also iPadOS, which is, as you've likely surmised, for iPads. OS X mobile is a fictitious term, and Tizen is an open source mobile device OS.
After enabling your device for communication using the IEEE 802.15.1 standard, what is the next step?
C. The IEEE standard 802.15.1 is commonly known as Bluetooth. The CompTIA A + objectives list the steps for connecting Bluetooth devices as follows: Enable Bluetooth. Enable pairing. Find a device for pairing. Enter the appropriate PIN code. Test connectivity. Not all Bluetooth devices require entering a pin. Opening a port is done on a router to allow a particular type of traffic to pass through the router to a connected network.
Which number that is a part of the GSM system is hard-coded into the phone and identifies your physical phone hardware to the cellular tower?
C. The International Mobile Equipment Identity (IMEI) is a unique number assigned to the physical phone. This unique identifier is hard-coded into the device. The Product Release Instructions (PRI) describe how your device connects to the network. An IMSI (International Mobile Subscriber Identity) number uniquely identifies the account holder, and a MAC (Media Access Control) address uniquely identifies a network interface card.
Which display component is capable of discharging energy and causing severe injuries to technicians?
C. The job of the inverter is to store and convert energy from DC to AC. Inverters have the potential to discharge that energy and can be dangerous to technicians, so be careful when working with them. A backlight provides light that shines through the Liquid Crystal Display (LCD) to create pictures on the screen.
A friend is trying to install an update on their iPod, but they're receiving a message about insufficient space. They want to know if you can upgrade their storage. What will you tell them?
C. The short answer is that no, storage on an iPhone, iPad, iPod, or almost any small device can't be upgraded. When you buy one of these devices, it's best to buy as mu Ki ch storage as you can afford. Attaching the device to your PC and doing the upgrade there may work. If not, you may not have to buy a new iPod if you have some data that you no longer need like conversations from years ago, or if you have some apps that you no longer use and can delete. You should be able to download them again later onto a new device. iCloud is storage in the cloud, and not the same as storage on your device; however, you could store photos in iCloud Photos or use Messages in iCloud to save space on the device.
You've been handed a device to install. The cable looks like the one here. What type of connector does this device use?
C. There are several different types of USB connectors. The one shown here is a microUSB.
You are investigating new laptops for your company. You want the laptop displays to have a wide viewing angle. Which technology standard is best suited for your needs?
C. There are three types of Liquid Crystal Display (LCD) technologies listed in the A+ exam objectives: Twisted Nematic (TN), In-Plane Switching (IPS), and Vertical Alignment (VA). IPS LCDs provide better color representation as well as wider viewing angles, so that would be the best choice for this situation. Their drawbacks are somewhat slower response times and they tend to be a bit more expensive. Considering the other two types of LCD technologies, TN displays were developed first. They use less power compared to IPS and VA; however, when you start viewing them at wider angles, the picture quality suffers greatly. VA LCDs have slower response times than either IPS or TN, but they have the best contrast and image depth. SVA, or Super Vertical Alignment, is a Samsung term, not a standard, but it claims to offer better viewing angles than VA displays. LED monitors use Light Emitting Diodes as the backlight for an LCD. There are also microLED monitors and OLED monitors that create colors using LEDs with no backlight require
Of the laptop LCD technologies, which consumes the least amount of power?
C. There are three types of Liquid Crystal Display (LCD) technologies listed in the exam objectives: Twisted Nematic (TN), In-Plane Switching (IPS), and Vertical Alignment (VA). Of those three display types, TN uses the least amount of power. TN displays also have very fast refresh rates. The issue with TN LCD screens is that when you start viewing them at wider angles, the picture quality suffers greatly. IPS LCDs provide better color representation as well as wider-angle viewing, but they tend to be a bit more expensive and have somewhat slower response times. VA LCDs have slower response times than either IPS or TN, but they have the best contrast and image depth. LED (Light-Emitting Diode) refers to a type of backlighting for LCD monitors.
Your significant other just purchased a new car and wants you to configure their cell phone to work through the car using voice commands. You must initiate pairing on the phone and choose to search for pairing devices on the car. What protocol is being used by the car and the device?
C. To connect Bluetooth devices, a user must initiate the pairing process on both devices. Bluetooth is used to create a PAN (personal are network) also known as a piconet. The range for a Bluetooth network is only about 30 feet. 802.11a is a Wi-Fi standard, Lightning is a type of connector, and Wi-Fi enabled refers to a device that uses a Wi-Fi connection. The CompTIA A + objectives list the steps for connecting Bluetooth devices as follows: 1 Enable Bluetooth. 2 Enable pairing. 3 Find a device for pairing. 4 Enter the appropriate PIN code. 5 Test connectivity.
You often work remotely, in your favorite coffee shop. What device can you use to physically protect your laptop from theft if you step away from the table for a minute?
C. To physically secure your laptop, use a cable lock. Essentially, a cable lock anchors your device to a physical structure, making it nearly impossible for someone to walk off with it. LoJack is software that can help secure data but does not prevent physical theft. A protective cover will help protect your device from damage if it gets dropped (and some are waterproof too), but it won't stop someone from stealing it. Docking stations are usually used in your home office or corporate office to provide a mobile device, such as a laptop, tablet, or smartphone, with access to external devices that can provide charging, speakers, and other features.
You've enabled Bluetooth on your new headset and your laptop and enabled pairing on both. They have discovered each other, so what is the typical next step?
C. When pairing two Bluetooth devices, depending on the security settings, it is sometimes necessary to enter a Bluetooth PIN code. In security configuration menus, the PIN is sometimes referred to as the Bluetooth passcode or passkey. The CompTIA A + objectives list the steps for connecting Bluetooth devices as follows: Enable Bluetooth. Enable pairing. Find a device for pairing. Enter the appropriate PIN code. Test connectivity.
A user wants a list of favorite websites to be readily available between multiple devices, including their mobile device. What is the best option?
C. When you synchronize bookmarks between devices, the website addresses are copied and readily available. The same synchronization can be done for several media types, such as videos, music, pictures, and documents.
Your friend's iPhone 13 will no longer charge. They have tried replacing the charging block and cable with compatible ones and tested the wall outlet. What should be done next?
C. While it's possible that the phone could be charged with a charging pad, most often phones won't charge because the battery is worn out and needs replacing. Also, according to the Apple Support website, a phone that won't charge likely needs servicing. Your friend should take their phone to a service center. They may be able to replace the battery or fix problems they find with the phone's connector.
You want to play video games on your tablet computer. Which accessory would you purchase if you wanted to play the game much like you would on a gaming console?
D. A good game controller can make your mobile device feel a bit more like a gaming console. Most of the game pads will look like standard console controllers and connect via Bluetooth. Touchpads and pointing sticks are input devices like a mouse. Touchpads are usually rectangular areas on a laptop where your finger movements replace moving a mouse. A pointing stick will usually be in the middle of a keyboard and is controlled with a single finger pushing the stick in any direction. A docking station lets a laptop connect to multiple devices with a single connection on the laptop, enabling the user to use it easily with full-sized devices like a desktop PC
A user is traveling to a country that employs content blocking technology on the cellular network. What would you suggest setting up to bypass the content blocking as well as keep the user's mobile browsing more private?
D. A virtual private network (VPN) will keep browsing confidential as well as bypass any local content blocking efforts. S/ MIME (Secure Multipurpose Internet Mail Extensions) is an encryption standard for securing email. Baseband is a type of signaling technology that only allows for one signal on a medium at a time (Ethernet uses this). The Preferred Roaming List (PRL) ensures that your cellphone connects to the most appropriate tower based on your location and provider.
You need to replace a failed hard drive in a user's laptop, and it's a model you are unfamiliar with. You look at the bottom of the laptop and see no obvious entrance points. Which component will you most likely need to remove to access the hard drive bay?
D. As a rule of thumb, either you can access components from the bottom of a laptop, such as the memory and Mini PCIe card, or you're going to need to remove the keyboard to access the components from the top.
You're installing Bluetooth speakers in a conference room and just entered the pin to connect the two devices. What is your next step?
D. As with any device installation in IT, the last step is to verify that the device works as intended. The CompTIA A + objectives list the steps for connecting Bluetooth devices as follows: Enable Bluetooth. Enable pairing. Find a device for pairing. Enter the appropriate PIN code. Test connectivity.
What configuration settings are commonly used when setting up email from an online provider on a device?
D. If you use a common email provider such as Google, Yahoo, Outlook, or iCloud, then setting up email on a device should be simple. Often all you need is your username and password. If setting up a corporate account or if you must manually configure email, then you'll need more information such as the protocol (IMAP [Internet Message Access Protocol] or POP3 [Post Office Protocol version 3]) and the server names for sending and receiving email. You may also need the port number and security settings.
A technician has a failed Lenovo laptop and suspects the motherboard is bad. They have several other laptops available from which they can harvest parts. Which of the following statements is most likely true regarding the replacement motherboard that is selected?
D. Laptop motherboards are nearly always proprietary, meaning they are not interchangeable between manufacturers or even between models from the same manufacturer. When a laptop motherboard needs to be replaced, you most likely need a laptop motherboard from the same make and model.
Oculus, Samsung, and HTC are manufacturers of what specific type of wearable technology devices?
D. Oculus VR specializes in virtual reality and augmented reality headsets (VR/ AR headsets). Samsung and HTC, while manufacturing smartphones, also produce VR/ AR headsets.
What type of display uses organic materials that themselves light up so that no backlight is needed, meaning true black and greater contrasts can be achieved?
D. The Organic LED (OLED) displays have incredible color contrast ratio because they can turn individual pixels off. They also have an excellent viewing angle. The drawback is that they may not be as bright as an LED (Light Emitting Diode) display. LED and mini-LED displays use LEDs for backlighting, but still need the LCD (Liquid Crystal Display) panel. QLED is a marketing name, but QLED displays use a quantum dot layer providing more color depth than regular LED displays. Micro-LEDs use three microscopic LEDs (red, green, and blue) to make each pixel, and each pixel can be turned on or off like an OLED TV. QLED, mini-LED, and micro-LED aren't on the CompTIA A + objectives yet.
Which laptop expansion port technology was developed by Apple and Intel and supports a wide variety of peripheral devices?.
D. Thunderbolt was co-developed by Apple and Intel as an offshoot of the DisplayPort technology. Apple added support for PCIe and launched it in 2011. In terms of versatility, it's second only to USB. You will find video devices, hard drives (both HDD and SSD), printers, laptop docking stations, audio devices, and PCIe expansion enclosures that use Thunderbolt. Thunderbolt 3 is compatible with USB-C.
What type of device would use a Lightning connector to charge and transfer data?
D. iPhones since the iPhone 5 have used a proprietary connector called the Lightning connector. Samsung smartphones and Fitbit watches most likely use a USB-C cable, whereas Intel-based laptops use a variety of charging jacks depending on the device.
