A+ study set #1
Which frequencies does Zigbee operate on?
2.4 GHz, 900 MHz, and 868 MHz
A sales person typically carries a laptop computer to several off-site customer meetings each day, but needs the flexibility to quickly attach other peripherals and charge the laptop battery while at their office desk. Which of the following laptop feature would BEST meet these requirements?
A laptop docking station
You need to purchase a case that meets the following criteria: Compatible with most form factors At least two external and internal bays Good balance of size and space Which case type should you purchase?
ATX mid-tower
After working without problems for a couple of years, your computer has begun to lock up. You suspect that it is a thermal issue, but you can't find any component that is not functioning correctly. You have not replaced the CPU or installed any new devices. The CPU cooling fan and the power supply fan are working properly. The lock-ups are happening with increasing frequency. Which of the following is the MOST common condition that might explain these symptoms?
An accumulation of dust has gradually built up.
A group of workers attend a team-building retreat at a remote cabin. They can place calls on their mobile smartphones, but the cabin has no wired phone, television, or wired internet connectivity. The workers need to access an internet webpage using their laptop computers. Which of the following internet connection types might be available to the workers?
Cellular
You have just installed a new USB card reader in your Windows computer. Every time you perform a certain action using the card reader, you get an error message that you've never seen before. Which of the following actions should you perform FIRST?
Check the manufacturer's website for information about the error
Currently, the users in your company are required to use their IP addresses when connecting to other hosts. Since IP addresses are difficult to remember, you want to implement a protocol on your network that allows computers to automatically find another host's IP address using a logical name. Which of the following protocols would be the BEST to implement?
DNS
Which component in a laser printer applies toner to the drum, causing the toner to stick to the charged areas on the drum?
Developing Roller
The PCI sound card in your computer has stopped working. You decide to use the motherboard's integrated sound until you can replace the PCI sound card. After removing the PCI sound card and powering on the computer, you have no sound ,and the built-in sound card does not show up in Device Manager. To solve this issue, which of the following is the BEST action to try first?
Edit the CMOS settings and enable the onboard sound.
You are purchasing several PC system that will be used as thin clients in a large organization. Which of the following hardware selection criteria would be the MOST important for this system?
Gigabit Ethernet adapter
After arriving in a new city today, a traveling sales team member calls you stating that his wireless connection no longer works. He has checked the wireless configuration, and he knows it to be correct because it was working yesterday. What should you do first?
Have him check that his wireless card hardware switch is turned on
advantages of using fiber optic cabling for a network, as opposed to other types of cabling?
Immunity to electromagnetic interference Greater cable distances without a repeater
A user reports that he can't browse to a specific website on the internet. From his computer, you find that a ping test to the Web server succeeds. A traceroute test shows 17 hops to the destination web server. What is the most likely cause of the problem?
Incorrect DNS server address
You are setting up a small network in your office with one Windows server and 50 Windows workstations. You want to spend as little time as possible configuring the workstations with IP addressing information. What should you do?
Install and configure the DHCP service on your server.
When referring to cloud computing, what does the term cloud mean?
It is a metaphor for the internet based on the basic cloud drawing used to represent the telephone network.
You have just finished upgrading the 250 W power supply in your desktop computer to a 450 W power supply. Now the BIOS doesn't recognize one of the hard disk drives in the system during POST. Which of the following troubleshooting steps is the BEST to try first?
Make sure that the hard disk is connected to the power supply.
A user pays for a retail purchase by placing a smart phone next to the merchant's reader. Which of the following mobile device connections is being used?
NFC
Which network component connects a device to the transmission media and allows it to send and receive messages?
NIC
A company buys a new, expensive laser printer that they want all of their users to be able to use. What type of connection should you use to make sure that all users can connect?
Network connection
You use a 64-bit version of Windows 10 Professional. This system has a 500 GB hard disk and 4 GB of system RAM. Using Hyper-V, you plan to test multiple virtual servers and virtual workstations. Will it work?
No, you need more RAM
A help desk technician has reset a user's password multiple times, but each time, the user is unable to log into a laptop. The user is confident that the password has been typed correctly. What could be wrong?
Num lock is on
While using the touchpad on a laptop computer, you notice that the mouse is not responding very well, making it difficult to move the mouse around the screen. Which of the following actions would MOST likely fix this problem?
Recalibrate the touchpad
A technician is servicing a laptop that works properly when the power adapter is plugged in. Even though the battery icon shows that the battery is fully charged, when the laptop is unplugged, the laptop immediately shuts down. Which of the following actions should the technician perform?
Replace the laptop battery.
You have purchased an LED monitor and connected it to the HDMI port on your computer using an HDMI cable. You configure the screen resolution to 1280 x 1024 with 32-bit color. The geometry of the images displayed on the screen appear to be distorted. What do you do?
Set the display resolution to the native resolution
Which connector on the back of a computer is used to attach a mouse to a modern PC system?
USB
After replacing a laptop touchpad, a technician finds that the touchpad does not move the cursor. However, the attached USB mouse does. Before opening the laptop case to re-check the connection, which of the following actions should the technician perform?
Unplug the USB mouse and re-check touchpad movements.
You are building a new computer from both new and used parts. The video card is a PCIe video card that requires an 8- pin power connector. However, your power supply doesn't have an 8-pin PCIe power connector. Which solution would be the least expensive option for your system?
Use an adapter cable to connect two 4-pin Molex connectors to the 8-pin PCIe connector.
You are the network technician for a small company. One of your responsibilities is to ensure that all new hardware is connected and functioning properly. You have several different types of connections that are used for various types of hardware. One of the types of cable available to you is an RJ45 cable. Which of the following BEST describes where this cable would most likely be used?
Voice over IP connection
You currently use the Exchange email client on your desktop PC. You use it to connect to an email server provided by a service provider using the IMAP and SMTP protocols. You recently purchased an iPad, and you want to configure its Mail app to connect to your email server. Which of the following BEST describes whether this task can be accomplished?
You can configure the Mail app on an iPad to connect to an email server using the IMAP and SMTP protocols.
Which term describes the layer of software that resides between the virtual operating system and the physical hardware it is running on in a virtualization environment?
hypervisor
