Comptia A+ Quizset
Which kind of socket incorporates "lands" to ensure connectivity to a CPU?(3.6) A. PGA B. Chipset C. LGA D. Copper E. AM4
. LGA (Land Grid Array) is the type of socket that uses "lands" to connect the socket to the CPU. PGA (Pin Grid Array) sockets have pinholes that make for connectivity to the CPU's copper pins. AM4 is a PGA socket that accepts AMD CPUs such as the Ryzen 7.
Which of the following are possible reasons a laptop's LCD suddenly went blank with no user intervention? (Select the two best answers.) Damaged inverter . Damaged LCD Burned-out backlight . Incorrect resolution setting
A and C. A damaged inverter or burned-out bulb could cause a laptop's display to go blank. You can verify whether the LCD is still getting a signal by shining a flashlight atthe screen. A damaged LCD usually works to a certain extent and will either be cracked, have areas of the Windows interface missing, or show other signs of damage. An incorrect resolution setting can indeed make the screen suddenly go blank (or look garbled), but that scenario will most likely occur only if the user has changed the resolution setting—and this question specifies "with no user intervention.
When finished installing a new printer and print drivers, what should you do? (Select all that apply.)(3.11) A. Calibrate the printer. B. Install the print drivers. C. Check for compatibility. D. Print a test page.
A and D. After the printer is installed (meaning it has been connected and the drivers have been installed), you should calibrate the printer (if necessary) and print a test page. You should also consider updating the firmware for the printer. Before starting the installation, you should check for compatibility with operating systems, applications, and so on.
Which of the following address printer data privacy concerns? (Select the two best answers.) A. Implementing user authentication on the device B. Ad hoc mode C. AirPrint D. Clearing the cache
A and D. Implementing user authentication for the printer or print server (PIN or password) and clearing the cache on the printer both address printer data privacy concerns. Bluetooth ad hoc mode network printing can be used by mobile devices where no wireless access point exists. AirPrint is an Apple technology for macOS and iOS used to automatically locate and download drivers for printers.
Which of the following can have 8 pins? (Select all that apply.) (3.6) A. PCIe B. SATA C. ATX main power D. CPU E. Molex
A and D. PCIe power can be 8-pin or 6-pin. CPU power (EATX12V) can be 8-pin or 4-pin. SATA power is 15-pin (and data is 7-pin). ATX main power is typically 24-pin. Molex is a 4-wire connector; it is sometimes also referred to as "peripheral."
A customer has a brand new Chromebook and needs help configuring it. Which of the following should you help the user with? (Select the three best answers.) (3.9) A. Touchpad B. Initial account setup C. Registry D. Touchscreen E. App Store applications F. Task Manager
A, B, and D. You should show the user how to configure the touchpad and touchscreen, and guide the user through the initial account setup. Chrome OS is a fairly simple system compared to Windows and other operating systems. To configure devices, simply go to the "Home" or app launcher button, then Settings, then Devices. The registry is a Windows configuration tool—even if this was a Windows computer, the typical user has no place in the registry. The App Store is Apple's application download site. Google uses the Play Store. The Task Manager is another Windows utility. Consider writing a short user guide in Word document format if you have multiple users accessing the same type of system for the first time. Write it once, and train many!
Which of the following is a group of Windows desktop computers located in a small area?(2.7) A. LAN B. WAN C. PAN D. MAN
A. A local area network (LAN) is a group of computers, such as a SOHO network located in a small area. A wide area network (WAN) is a group of one or more LANs spread over a larger geographic area. A personal area network (PAN) is a smaller computer network used by smartphones and other small computing devices. A metropolitan area network (MAN) is a group of LANs in a smaller geographic area of a city.
Which type of server acts as a go-between for clients and websites?(2.5) A. Proxy server B. Print server C. Syslog server D. DHCP server
A. A proxy server is a caching server used to store commonly accessed websites by clients. It can be incorporated into a web server but often it runs as a standalone server. A print server manages network printers and their spooling of print jobs, priorities, and so on. A Syslog server gathers logging data from network devices and allows for the easy analysis of those logs from a client workstation. A DHCP server hands out IP addresses (and other TCP/IP information) to client computers.
Which Internet service makes use of PSTN? (2.7) A. Dial-up B. ISDN C. DSL D. Cable Internet
A. Dial-up Internet connections make use of the public switched telephone network (PSTN) and POTS phone lines. ISDN was developed to meet the limitations of PSTN. DSL provides faster data transmissions over phone lines (or separate data lines). Cable Internet is a broadband service that offers higher speeds than DSL; it is provided by cable TV companies.
Which voltages are supplied by a Molex power connector? (3.6) A. 12 V and 5 V B. 5 V and 3.3 V C. 3.3 V and 1.5 V D. 24 V and 12 V
A. Molex connectors provide 12 volts and 5 volts. There are four wires: if color-coded, yellow is 12 V, red is 5 V, and the two blacks are grounds.
Which of the following best describes a specification for accessing storage while using PCI Express?(3.4) A. NVMe B. 7200 RPM C. Hot-swappable D. 3.5-inch and 2.5-inch
A. Non-Volatile Memory Express (NVMe) is a specification for accessing storage while using PCI Express. Essentially, the M.2 slot on a motherboard taps into the PCI Express bus (×4) and uses a portion of the total bandwidth associated with that bus. The platters in a hard disk drive (HDD) rotate at a certain speed. For example, 7200 RPM is common; other typical speeds include 5400 RPM and 10,000 RPM. Hot-swappable capability is when drives can be removed and inserted while the system is on. SATA-based hard drives come in two main widths: 3.5-inch and 2.5-inch. The 3.5-inch drive is used in desktop computers, network-attached storage, and other larger devices. The 2.5-inch drive is used in laptops and other smaller devices.
Which of the following enables the user to increase the base clock within the BIOS, thereby increasing the clock speed of the CPU? A. Overclocking B. L3 cache C. Integrated GPU D. Heat sink
A. Overclocking enables the user to increase the clock speed of the CPU within the BIOS. Level 3 (L3) cache comes in the largest capacities of the three types of cache and has the most latency; therefore, it is the slowest. If the CPU can't find what it needs in L1, it moves to L2 and finally to L3. An integrated GPU is a video adapter that is built into the motherboard. The heat sink helps to dissipate heat from the CPU and is usually aided by a fan or liquid cooling system.
Which of the following allows for network throttling of individual computers or applications?(2.3) A. QoS B. Port forwarding C. DMZ D. DHCP
A. Quality of service (QoS) is a technology used in SOHO routers that can throttle bandwidth and give higher priority to individual computers or applications. Port forwarding is used to forward outside network ports to internal IP addresses. A demilitarized zone (DMZ) is a protected area between the LAN and the Internet—often inhabited by company servers. The Dynamic Host Configuration Protocol (DHCP) is the protocol in charge of automatically handing out IP address information to clients.
Which kind of video technology do most laptop LCDs use? A.TFT active matrix B.Passive matrix C.OLED D.MAC ID
A. TFT active-matrix displays are the most common in laptops that use LCDs. Passive-matrix screens have been discontinued, but you might see an older laptop thatutilizes this technology. OLED technology is a newer and different technology that is not based on TFT displays but instead uses emissive display technology, meaning that each dot on the screen is illuminated by a separate diode. OLED displays can, however, be passive-matrix or active matrix controlled. The MAC ID is the hexadecimal address associated with a network adapter, such as a Wi-Fi adapter or network card.
Which stage of the laser printing/imaging process involves extreme heat?(3.11) A. Fusing B. Transferring C. Exposing D. Writing
A. The fusing step uses heat (up to 400 degrees Fahrenheit/200 degrees Celsius) and pressure to fuse the toner permanently to the paper.
Which component supplies power to the CMOS when the computer is off?(3.5) A. Lithium battery B. POST C. Power supply D. BIOS
A. The lithium battery (or CMOS battery) supplies power to the CMOS when the computer is off. This is because the CMOS is volatile and would otherwise lose the stored settings when the computer is turned off.
What is the transfer rate of DDR4-2133?(3.3) A. 17,066 MB/s B. 19,200 MB/s C. 21,333 MB/s D. 25,600 MB/s
A. The transfer rate of DDR4-2133 is 17,066 MB/s. It is also known as PC4-17000. 19,200 MB/s is the speed of DDR4-2400 (PC4-19200). 21,333 MB/s is the speed of DDR4-2666 (PC4-21333). 25,600 MB/s is the speed of DDR4-3200 (PC4-25600).
Your boss is concerned with overlapping wireless networks from neighboring companies using 802.11ac. Which tool should you use to analyze the problem, and which frequency should you display for analysis?(2.8) A. Wi-Fi analyzer; 5 GHz B. Cable certifier; 5 GHz C. Loopback plug; 2.4 GHz D. Wi-Fi analyzer; 2.4 GHz
A. To analyze the problem, use a Wi-Fi analyzer! Because your boss is concerned about wireless networks using 802.11ac, you would display the results for 5-GHz networks, not 2.4 GHz. Cable certifiers are used to check long-distance wired connections, for example, from a patch panel to an RJ45 jack. The loopback plug is used to simulate a network connection, which can help with identifying switch ports, and testing a PC's network connection.
Which type of cable can connect a computer to another computer directly?(3.1) A. Straight-through B. Crossover C. 568A D. SATA E. 568B
B. A crossover cable is used to connect like devices: computer to computer or switch to switch. Straight-through cables (the more common patch cable) do not connect like devices (for example, they connect from a computer to a switch). 568B is the typical wiring standard you will see in twisted-pair cables; 568A is the less common standard. A crossover cable uses the 568B wiring standard on one end and 568A on the other end. (By the way, sometimes you will see these written as T568A and T568B.) SATA is used to connect hard drives internally to a desktop or laptop computer.
Which of the following connectors would you use to power a video card?(3.5) A. 24-pin power B. 6-pin PCIe C. Molex D. 3.5-mm TRS
B. A video card is normally powered by a 6-pin or 8-pin PCIe connector. Lesser cards are simply powered by the PCIe bus. The 24-pin power connector is the main connector that leads from the power supply to the motherboard. Molex is used for fans, older IDE drives, and other secondary devices. 3.5 mm (or 1/8 inch) TRS is an audio connection.
While looking at the details of a server in your provider's control panel, you notice that it says "Apache" in the HTTP summary. What kind of server is this?(2.5) A. File server B. Web server C. E-mail server D. Authentication server
B. Apache is a type of web server that runs on Linux. It is also known as Apache HTTP Server. File servers are used to store and transfer files but not websites. E-mail servers deal with the sending and receiving of electronic mail via POP3, IMAP, and SMTP. Authentication servers verify the identity of users logging in and computers on the network.
Which connector is used for cable Internet? (3.1) A. LC B. F-connector C. BNC D. RJ45 E. DE-9
B. Cable Internet connections use RG-6 coaxial cable (usually) with an F-connector on the end. LC is a type of fiber optic connector. BNC is an older connector type used by coaxial networks. RJ45 is the connector used on twisted-pair patch cables. DE-9 (or DB-9) is a serial connector used with RS-232 connections.
Which of the following is often broken down into groups of channels including 1-5, 6-10, and 11?(2.4) A. 802.11ac B. 2.4 GHz C. 5 GHz D. 802.11a
B. In the United States, the 2.4-GHz frequency range is broken down into three categories: Channel 1-5, 6-10, and 11. By placing separate wireless networks on separate distant channels (such as 1 and 11), you can avoid overlapping and interference. 802.11ac and 802.11a are standards, not frequencies. 5 GHz uses channels such as 36, 40, 149, 153, and so on.
Which of the following sets of parts is associated with inkjet printers?(3.11) A. Imaging drum, fuser assembly, transfer belt, transfer roller, pickup rollers, separation pads, duplexing assembly B. Ink cartridge, print head, roller, feeder, duplexing assembly, carriage, and belt C. Feed assembly, thermal heating unit, thermal paper D. Print head, ribbon, tractor feed, impact paper
B. Inkjet printer components include ink cartridge, print head, roller, feeder, duplexing assembly, carriage, and belt. Imaging drum, fuser assembly, transfer belt, transfer roller, pickup rollers, separation pads, and duplexing assembly are associated with laser printers. Feed assembly, thermal heating unit, and thermal paper are associated with thermal printers. Print head, ribbon, tractor feed, and impact paper are associated with impact printers.
Which of the following forwards an external network port to an internal IP address/port on a computer on the LAN? (2.3) A. NAT B. Port forwarding C. DMZ D. DHCP
B. Port forwarding is used to forward external network ports to an internal IP and port. This is done so a person can host services such as FTP internally. Network address translation (NAT) is used by most routers to convert the internal network of IP addresses to the single public IP address used by the router. The demilitarized zone (DMZ) is an area that is protected by the firewall but separate from the LAN. Servers are often placed here. DHCP is the protocol that governs the automatic assignment of IP addresses to clients by a server.
Which of the following can be defined as the amount of heat generated by the CPU, which the cooling system is required to dissipate?(3.6) A. GPU B. TDP C. PSU D. 140 watts
B. TDP (thermal design power) is the amount of power required to cool a computer and is linked directly to the amount of heat a CPU creates. Some CPUs come with a built-in graphics processing unit (GPU). This means that with a compatible motherboard, no separate video card is necessary. PSU stands for power supply unit. 140 watts is a potential TDP rating but does not define what TDP is.
You have been tasked with replacing a Wi-Fi/Bluetooth card in a laptop. You open the laptop and find a card that uses the 2230 standard. What type of card is this? Mini PCIe . M.2 Digitizer . RJ45
B. The 2230 standard is a kind of M.2 size measuring 22×30 mm. It is common in laptops for use with Wi-Fi and Bluetooth. In comparison, a PC often uses a 2280 M.2 card. Mini PCIe is an older type of card slot that might be used for Wi-Fi cards, but it does not use measurements such as 2230 or 2280 the way that M.2 does. A digitizer is not aport at all but a device that converts tapped impulses into digital information. An RJ45 port is a networking port that allows a laptop to communicate with the rest of the network in a wired fashion—that is, if the laptop has such a port!
When deciding on a CPU for use with a specific motherboard, what does it need to be compatible with?(3.6) A. Case B. Socket C. Wattage range D. PCIe slots
B. The CPU needs to be compatible with the socket of the motherboard. The case doesn't actually make much of a difference when it comes to the CPU. (Just make sure it's large enough!) There is no wattage range, but you should be concerned with the voltage range of the CPU. PCI Express (PCIe) slots don't actually play into this at all because there is no direct connectivity between the two.
Where would you go in Windows to enable printer sharing?(3.10) A. Network Connections B. Network and Sharing Center C. The printer's OSD D. Bonjour
B. The Network and Sharing Center in Windows is where printer sharing is enabled. Network Connections is the window that shows the Ethernet and Wi-Fi connections a PC has to the network. Windows sharing has to be done in Windows; it can't be done from the printer's on-screen display (OSD). Bonjour is a macOS service that enables automatic discovery of devices on the LAN; it can also be run on Windows.
Which of the following is the best type of custom computer for use with Pro Tools?(3.8) A. Graphic/CAD/CAM design workstation B. Audio/video editing workstation C. Gaming PC D. Virtualization workstation
B. The audio/video editing workstation is the type of custom computer that would use Pro Tools, Logic Pro X, and other music and video editing programs.
Which of these addresses needs to be configured to enable a computer access to the Internet or to other networks? (2.6) A. Subnet mask B. Gateway address C. DNS address D. MAC address
B. The gateway address must be configured to enable a computer access to the Internet through the gateway device. By default, the subnet mask defines the IP address's network and host portions. The DNS server takes care of name resolution. The MAC address is the address that is burned into the network adapter; it is configured at the manufacturer.
Which of the following allows for a 256-bit-wide bus? (3.3) A. ECC B. Quad-channel C. Parity D. DDR2
B. The quad-channel memory architecture can allow for a 256-bit-wide bus (64-bit per channel). However, this will only be the case if all four channels have memory installed to them. ECC stands for error correction code, which can detect and correct errors in RAM. Parity is when the RAM stores an extra bit used for error detection. DDR2 is a type of DRAM that, for the most part, was used in either single-channel or dual-channel environments.
During which step of the laser printing/imaging process is the transfer corona wire involved?(3.11) A. Developing B. Transferring C. Fusing D. Cleaning
B. The transfer corona wire gets involved in the laser printing/imaging process during the transferring step.
You want to test the local loopback IPv6 address. Which address would you use? (2.6) A. 127.0.0.1 B. ::1 C. FE80::/10 D. ::0
B. You would use the ::1 address. That is the local loopback address for IPv6. 127.0.0.1 is the local loopback for IPv4. FE80::/10 is the range of unicast auto-configured addresses. ::0 is not valid but looks similar to how multiple zeros can be truncated with a double colon.
Which of the following would be suitable for 1000-Mbps networks? (Select all that apply.) (3.1) A. Category 3 B. Category 5 C. Category 5e D. Category 6
C and D. Category 5e and Category 6 are suitable for 1000-Mbps networks (and Cat 6 is also suitable for 10-Gbps networks). Category 3 is suitable for 10-Mbps networks only. It is outdated and you most likely won't see it. Category 5 is suitable for 100-Mbps networks. In general, Cat 3 and Cat 5 networks should be upgraded.
You have set up a user to work at a thin client. They will be accessing the OS image and data from a Windows Server 2016 as well as data from the Google Cloud. Which of the following does this configuration not require? (Select the two best answers.) (3.9) A. Network connection B. CPU C. M.2 D. Virtualization E. SSD
C and E. This configuration will not need a hard drive, be it M.2 or other SSD. Thin clients are meant to either use an OS that is embedded in RAM (or other similar memory) or, more often, grab an image from a server, often as a virtual machine. To do so, the thin client will need a network connection (wired or wireless), and every computer needs a CPU.
Which motherboard form factor measures 12 inches × 9.6 inches (305 mm × 244 mm)? (3.5) A. microATX B. SATA C. ATX D. mITX
C. ATX boards measure 12 inches × 9.6 inches (305 mm × 244 mm). microATX boards are square and measure 9.6 × 9.6 inches (244 mm × 244 mm). SATA is a type of hard drive technology and the port used to connect hard drives to the motherboard. mITX (or Mini-ITX), also square, measures 6.7 × 6.7 inches (17 cm × 17 cm).
How many pins are on a DDR3 memory module?(3.3) A. 288 B. 184 C. 240 D. 200
C. DDR3 is a 240-pin architecture. 288-pin is DDR4, 184-pin is the first version of DDR (DDR1), and you can find 200-pin architectures in laptops; they are known as SODIMMs. To review, Table 10.2 shows the pin configurations for PC-based DDR1 through DDR4.
Your printer supports printing to both sides of paper. What should you enable in the Printing preferences?(3.10) A. Collate B. Orientation C. Duplex D. Quality
C. Duplexing (as it relates to printers) means to print to both sides. Collating means printing multiple copies of a document's pages in sequence, instead of printing all of the copies of one page at a time. Orientation is how the print job is displayed on the paper; it could be portrait (vertically—the default) or landscape (horizontal). Quality refers to the clarity of the print job, usually measured in dots per inch (DPI)—the higher the DPI the better.
What does Hyper-Threading do? (3.6) A. It gives you multiple cores within the CPU. B. It enables four simultaneous threads to be processed by one CPU core. C. It enables two simultaneous threads to be processed by one CPU core. D. It provides a high-speed connection from the CPU to RAM.
C. Hyper-Threading allows for an operating system to send two simultaneous threads to be processed by a single CPU core. The OS views the CPU core as two virtual processors. Multiple cores would imply multicore technology, which means there are two physical processing cores within the CPU package. Hyper-Transport is a high-speed connection used by AMD from the CPU to RAM
Your organization needs to run Windows in a virtual environment. The OS is expected to require a huge amount of resources for a powerful application it will run. What should you install Windows to?(3.8) A. Type 2 hypervisor B. Gaming PC C. Type 1 hypervisor D. Thin client
C. If the virtual operating system needs a lot of resources, the best bet is a "bare metal" Type 1 hypervisor. Type 2 hypervisors run on top of an operating system and therefore are not as efficient with resources. Gaming PCs have lots of resources but are not meant to run virtual environments. Thin clients have the least amount of resources.
Which technology assigns addresses on the 169.254.0.0 network number?(2.6) A. DHCP B. Static IP C. APIPA D. Class B
C. If you see an address with 169.254 as the first two octets, then it is Automatic Private IP Addressing (APIPA). This is also the link-local range for IPv4. The Dynamic Host Configuration Protocol (DHCP) assigns IP addresses automatically to clients but by default does not use the 169.254 network number. Static IP addresses are configured manually by the user in the IP Properties window. Class B is a range of IP networks from 128 through 191.
Which type of server runs Microsoft Exchange? (2.5) A. File server B. Authentication server C. E-mail server D. Web server E. SCADA
C. Microsoft Exchange is a type of e-mail server software. While you could run multiple services on a single server—for example, you could run the web server and e-mail server on the same machine—it isn't recommended. Unless you have a small office, all servers (such as file servers, authentication servers, e-mail servers, DHCP servers, and so on) should be separate entities. SCADA is not a server—it stands for Supervisory Control and Data Acquisition, a type of system used to control larger organizations' infrastructures such as heating/cooling, electricity, and so on.
Which of the following uses an organic compound that emits light? A.TFT active matrix B.IPS C.OLED D.LCD E.LED
C. OLED (organic light-emitting diode) displays use an organic compound or film that emits light. TFT active matrix implies LCD, and neither TFT nor LCD uses organic compounds the way OLED does. In-plane switching (IPS) is a type of LCD technology that increases the available viewing angle compared to older technologies, such as twisted nematic (TN) matrix LCDs. However, IPS is generally considered inferior to OLED screens when it comes to brightness and contrast ratio when viewed from an angle. LED screens use a film and diode, but not organically in the way that OLED does, and not at such a small size
Which level of RAID stripes data and parity across three or more disks?(3.4) A. RAID 0 B. RAID 1 C. RAID 5 D. Striping E. RAID 10
C. RAID 5 stripes data and parity across three or more disks. RAID 0 does not stripe parity; it stripes data only and can use two disks or more. RAID 1 uses two disks only. Striping is another name for RAID 0. RAID 10 contains two sets of mirrored disks that are then striped.
Which of the following would a company most likely use for authentication to a server room? (2.4) A. 802.11ac B. 802.15-4 C. RFID D. Z-Wave E. MIMO
C. RFID (radio-frequency identification) is commonly used for access to areas of a building such as a server room. It is often implemented as a proximity-based ID card or badge. The other options are not usually associated with authentication. 802.11ac is a WLAN (Wi-Fi) standard that runs on 5 GHz and can provide 1 Gbps of data transfer. 802.15-4 is the IEEE standard for Zigbee. Z-Wave, like Zigbee, is a home automation and wireless sensor control technology. MIMO (multiple-input and multiple-output) is a multiple propagation technology used to increase data transfer in 802.11n and 802.11ac wireless networks.
Which type of cable would you use if you were concerned about EMI? (3.1) A. Plenum-rated B. UTP C. STP D. Coaxial
C. STP (shielded twisted pair) is the only cable listed here that can reduce electromagnetic interference. However, fiber optic cable is another good solution, though it will be more expensive, and more difficult to install. Plenum-rated cable is used where fire code requires it; it doesn't burn as fast, releasing fewer PVC chemicals into the air.
A customer complains that an important disc is stuck in the computer's DVD-ROM drive. What should you recommend to the customer?(3.4) A. To get a screwdriver and disassemble the drive B. To format the disc C. To use a paper clip to eject the tray D. To dispose of the drive and replace the media
C. Tell the customer to use a paper clip to eject the DVD-ROM tray. Disassembling the drive is not necessary; the customer shouldn't be told to do this. If the disc is rewritable, formatting it would erase the contents, even if you could format in this scenario. Never tell a customer to dispose of a DVD-ROM drive; they rarely fail.
Which tool is used to test a network adapter not connected to the network? (2.8) A. Punchdown tool B. Cable tester C. Loopback plug D. Tone generator and probe
C. To test a network adapter without a network connection, you would use a loopback plug. This simulates a network connection. It can also be used to test a switch port. Punchdown tools are used to punch individual wires to a patch panel. Cable testers such as continuity testers test the entire length of a terminated cable. A tone generator and probe kit can also test a cable's length, but only tests one pair of wires at a time.
You have been tasked with compartmentalizing the network. Which of the following technologies should you use?(2.6) A. APIPA B. VPN C. VLAN D. IPv6
C. You would create a virtual LAN (VLAN). Another valid option would be to implement IP subnetting. APIPA (also known as link-local) is an IP technology that auto-assigns addresses on the 169.254 network. A virtual private network (VPN) allows remote clients to connect to a network over the Internet using a secure tunnel. IPv6 in of itself does not compartmentalize the network. However, an IPv6 network that has been subnetted would be acceptable.
Which power connector should be used to power an SATA hard drive?(3.6) A. Molex B. 6-pin C. 24-pin D. 15-pin
D. 15-pin connectors power SATA hard drives and other SATA devices (such as optical drives). Molex connectors power fans, older IDE devices, and other secondary devices. 6-pin power connectors are used for video cards (as are 8-pin connectors). 24-pin refers to the main power connection for the motherboard.
Which standard can attain a data transfer rate of 1 Gbps over a wireless connection?(2.4) A. 802.11a B. 802.11b C. 802.11g D. 802.11ac E. 802.3ab
D. 802.11ac can attain speeds in excess of 1 Gbps over wireless. 802.11a and g have a typical maximum of 54 Mbps. 802.11b (rarely used today) has a maximum of 11 Mbps. 802.3ab is the IEEE specification for 1-Gbps transfer over twisted-pair cables—it is wired, not wireless. By the way, this is also known as 1000BASE-T.
Which of the following would include a gigabit NIC and a RAID array?(3.8) A. Gaming PC B. Audio/video editing workstation C. Thin client D. NAS
D. A NAS (network attached storage) device will allow users to access files and stream media; it normally has a gigabit NIC and a RAID array. The rest of the answers will most likely include a gigabit network connection, but not a RAID array.
Which of the following has the largest potential for storage capacity? (3.4) A. CD-R B. CD-RW C. DVD-RW D. Blu-ray
D. Blu-ray, at a typical maximum of 50 GB, has the largest storage capacity. CDs top out just under 1 GB. DVDs have a maximum of 17 GB.
Which of the following is described as the simultaneous sending and receiving of network data?(2.3) A. Half-duplex B. Latency C. PoE D. Full-duplex
D. Full-duplex is when a network adapter (or other device) can send and receive information at the same time. Half-duplex is when only sending or receiving can be done at one time. Latency is the delay it takes for data to reach a computer from a remote location. PoE is Power over Ethernet, a technology that allows devices to receive data and power over an Ethernet network cable.
A company salesperson just returned to the United States after three months in Europe. Now the salesperson tells you that her PC, which worked fine in Europe, won't turn on. What is the best solution?(3.6) A. Install a new power supply. B. The computer will not work in the United States due to European licensing. C. Install a power inverter to the power supply. D. Change the voltage from 230 to 115.
D. Most likely, the voltage selector was set to 230 V so that it could function properly in Europe (for example, in the UK). It needs to be changed to 115 V so that the power supply can work properly in the United States. Make sure to do this while the computer is off and unplugged.
What would be required to attach RJ45 plugs to the ends of a single patch cable?(2.8) A. Tone and probe kit B. Multimeter C. Cable stripper D. Crimper
D. RJ45 plugs are attached to the cable ends with a tool called a crimper. A tone generator and probe kit is used to trace hard-to-find telecommunication and data communication cables/wires. A multimeter can be used to test continuity of a patch cable. A cable stripper is used to strip a portion of the plastic jacket off the cable, exposing the individual wires.
How much data can an SATA Revision 3.0 drive transfer per second?(3.4) A. 50 MB/s B. 90 MB/s C. 1969 MB/s D. 6 Gb/s E. 16 Gb/s
D. SATA Revision 3.0 drives can transfer 6 Gb/s, which after encoding amounts to 600 MB/s. SATA Revision 3.2 is 16 Gb/s (1969 MB/s) but requires SATA Express or M.2. 50 MB/s is a typical write speed for Blu-ray discs and some flash media. 90 MB/s is a typical write speed for an SD card.
Which cable type would be suitable for longer distances such as connecting two cities?(3.1) A. Coaxial B. Twisted pair C. Multimode fiber D. Single-mode fiber
D. Single-mode fiber is used for longer distance runs, perhaps from one city to the next (as far as thousands of kilometers). Coaxial is common for connections between utility poles and houses/buildings. Twisted pair is common in LANs. Multimode cables have a larger core diameter than single-mode cables. It is the more commonly used fiber optic cable in server rooms and when making network backbone connections between buildings in a campus.
You have been tasked with setting up a small office with the fastest Internet service possible. There is no fiber optic availability in the area because of the rocky, hilly terrain. Which Internet service will typically offer the best data transfer rates?(2.7) A. WMN B. FTTP C. DSL D. Cable Internet E. Fixed wireless
D. The Internet service with the best data transfer rates will typically be cable Internet. Cable Internet service is generally "faster" than DSL. WMN stands for wireless mesh network, a type of network that uses multiple access points—but it is not an Internet service. FTTP stands for fiber to the premises, which is not available in the scenario. Fixed wireless (or line-of-sight wireless Internet service) can offer very high data transfer rates, but it requires an unobstructed view of the provider's tower. This is probably not an option due to the rocky, hilly area where the customer's office resides.
Which represents the proper order of the laser printing/imaging process?(3.11) A. Processing, charging, developing, exposing, fusing, transferring, cleaning B. Developing, processing, charging, exposing, transferring, fusing, cleaning C. Charging, exposing, developing, processing, transferring, fusing, cleaning D. Processing, charging, exposing, developing, transferring, fusing, cleaning
D. The proper order of the laser printing/imaging process is processing, charging, exposing, developing, transferring, fusing, cleaning.
What seals the tiny gaps between the CPU cap and the heat sink? (3.6) ? A. Grape jelly B. Plumber's putty C. 3-in-1 house oil D. Thermal compound E. TDP
D. Thermal compound/thermal paste is used to seal the small gaps between the CPU and heat sink. It is sometimes referred to as thermal gel or jelly (among a variety of other names), but not grape jelly. (Did I ever tell you about the time I found grape jelly inside a customer's computer? Fun times.) Note: Never use petroleum-based products (such as 3-in-1 oil or WD-40) inside a computer; the oils can damage the components over time. TDP stands for thermal design power.
To implement a secure boot process, which device should be listed first in the Boot Device Priority screen? (3.5) A. Network B. CD-ROM C. USB D. Hard drive
D. To ensure that other users cannot boot the computer from removable media, set the first device in the Boot Device Priority screen to hard drive.
Which of the following is a chip that stores encryption keys?(3.5) A. Intel VT B. Secure boot C. Firmware D. TPM
D. To perform hard drive encryption, some motherboards come with a Trusted Platform Module (TPM), a chip that stores encryption keys—it can be enabled in the BIOS. Intel Virtualization Technology (VT) is part of the firmware that supports the use of virtualization software such as Hyper-V and VMware. Secure boot can block rootkits and other malware from launching boot loaders that have been tampered with. Firmware (such as a motherboard's BIOS) should be updated or "flashed," periodically to take advantage of the latest functionality and security updates.
Which of the following allows you to access a WLAN? LED Webcam Digitizer Stylus Wi-Fi card
E. A Wi-Fi card, also known as a Wi-Fi network adapter, allows you to connect to a WLAN (wireless local area network), which is essentially another name for a Wi-Fi network. LED is a type of display. A webcam is used to communicate visually and audibly with others or to record oneself. A digitizer is a device that converts tapped or written impulses on a screen into digital information that the operating system can use. A stylus is a writing device used with a digitizer or touchscreen.
You have been tasked with connecting a newer Android-based smartphone to an external TV so that you can display the CEO's smartphone screen during a meeting. Which of the following adapters would be the best solution typically? (3.1) A. Micro-USB to HDMI B. Micro-USB to DVI C. USB-C to DVI D. USB-C to Ethernet E. USB-C to HDMI
E. Typically, you would use USB-C to HDMI. If it is a newer Android-based smartphone, then chances are that it will have a USB-C port. If you are attempting to connect it to a TV, then HDMI is the most likely port to use. Micro-USB is used with many mobile devices, but newer devices (especially Android-based devices) have switched to, or are moving toward, USB-C. You wouldn't want USB-C to DVI because TVs normally don't have DVI inputs. USB to Ethernet helps to convert from a computer or mobile device to the Ethernet network. These devices can ultimately allow a device or computer with a USB port to access the Internet. This wired connection might be favored over wireless for its speed, quality connection, and low latency.
