Practice Test 1: Exam 220-901 Flashcards
You are investigating computer specifications for a new desktop workstation. If the specifications include 256KB of L2 cache, approximately how much L1 cache would it be reasonable to expect the computer to have?
A. 64KB
B. 256KB
C. 512KB
D. 12MB
A. 64KB
L1 cache is generally the smallest and fastest cache. Therefore, it’s reasonable to expect that the computer will have less L1 cache than L2.
You have installed a printer on your Windows 10 computer using TCP printing and configured it to use the RAW protocol. Which port number will you need to open in Windows Firewall for this to work successfully?
A. 9100
B. 721
C. 515
D. 443
A. 9100
TCP printing’s RAW protocol uses TCP port 9100 by default. The alternative, LPR, uses source ports 721–731 and the destination port 515.
A user reports that his iPhone will not make any sounds. He has turned the phone off and back on, and the problem is still there. You check his settings, and the phone is not on silent mode and the volume is set to maximum. What can you to fix this problem?
A. Reset the phone to factory specifications.
B. Replace the speakers.
C. Replace the sound card.
D. Replace the phone.
D. Replace the phone.
If the device does not produce sound, first make sure that it’s not set to silent operation. Most mobile devices will have a switch on the side that sets them to silent or vibrate mode, which will mute the device from making noises. Also check the volume settings. If the speakers have failed on a mobile device, it’s time for a new device.
You have a laptop with a dead hard drive. You want to replace it with a newer SSD but have a few concerns. What disadvantages do SSDs have versus HDDs? (Choose two.)
A. They produce more heat.
B. They are more expensive.
C. They are more susceptible to damage.
D. They have less capacity.
B. They are more expensive.
D. They have less capacity.
SSDs have many advantages over HDDs, including producing less heat and being less susceptible to damage from shock or overheating. However, they are more expensive per byte and have less capacity.
You purchased a new monitor that has a native resolution of 1920x1080. What aspect ratio is this, and is it compatible with widescreen television aspect ratios?
A. 16:9, yes
B. 16:9, no
C. 16:10, yes
D. 16:10, no
A. 16:9, yes
The monitor has a resolution of 16:9. You can determine this by dividing the first number in the resolution by 16 and multiplying the result by 9. It should equal the second number. (Or, you can just multiply the second number by 1.778, and it should equal the first number. For 16:10 you would multiply the second number by 1.6, and it should equal the first.) 16:9 is the aspect ratio for high-definition television.
A laser printer you are working on is producing images that have vertical black streaks running the length of the page. Which of the following could be causing this? (Choose two.)
A. Scratch in the EP drum
B. Fusing assembly not heating up properly
C. Worn exit rollers
D. Dirty charging corona wire
A. Scratch in the EP drum
D. Dirty charging corona wire
A groove or scratch in the EP drum can cause the problem of vertical black lines running down all or part of the page. Because a scratch is lower than the surface, it doesn’t receive as much (if any) of a charge as the other areas. The result is that toner sticks to it as though it were discharged. The groove may go around the circumference of the drum, so the line may go all the way down the page. Another possible cause of vertical black lines is a dirty charging corona wire. A dirty charging corona wire prevents a sufficient charge from being placed on the EP drum. Because the charge on the EP drum is almost zero, toner sticks to the areas that correspond to the dirty areas on the charging corona.
You have installed an 802.11g Wi-Fi network. The network has three overlapping wireless access points. What channels should you set the access points to in order to avoid communications problems?
A. 1, 5, and 9.
B. 1, 6, and 11.
C. 2, 7, and 12.
D. Any three different channels will work fine.
B. 1, 6, and 11.
To avoid communications problems, you need to set the wireless access points to have nonoverlapping channels. In 802.11g, the three non-overlapping channels are 1, 6, and 11.
You are installing an ATX power supply. Which of the following is not a voltage provided by the power supply?
A. –3.3VDC
B. +5VDC
C. +12VDC
D. –12VDC
A. –3.3VDC
ATX power supplies provide the following voltages for the computer: +3.3VDC, +5VDC, –5VDC (on older systems), +12VDC, and –12VDC. The 12v connectors have either four or eight pins.
A user complains that his desktop computer randomly reboots. He does not see any error messages before it happens, and there is not a specific program that triggers the reboot. Which of the following components is most likely to be causing this problem?
A. RAM
B. Hard drive
C. BIOS
D. Network adapter
A. RAM
Memory problems can cause system lockups, unexpected shutdowns or reboots, or errors such as Blue Screen of Death (BSOD) in Windows or the rotating pinwheel in MacOS. CPUs problems can also cause intermittent rebooting.
A user calls the help desk to report that she has no network connectivity. She had connectivity yesterday, but when she booted up her desktop computer this morning, she could not connect. She does not use the wireless network. No other users have reported issues. What is the first thing you should do?
A. Check to see whether the network card driver is responding.
B. Run IPCONFIG to see what her IP address is.
C. Use a loopback plug to test the network card.
D. Check to ensure that the network cable is plugged in.
D. Check to ensure that the network cable is plugged in.
Rule #1 of troubleshooting is to always check your connections first. The most common issue that prevents network connectivity on a wired network is a bad or unplugged patch cable.
A user calls to report that he can’t access the Internet or a corporate server. However, he is still able to print to a printer nearby. He has not received any error messages. Other users in his area are able to access all network resources and the Internet. What is most likely the problem?
A. Incorrect subnet mask
B. Network card failure
C. IP address conflict
D. Default gateway is down
A. Incorrect subnet mask
You can immediately rule out client-side hardware issues because the user can connect to some resources. You just need to figure out why he can’t connect to others. This is most likely caused by one of two things: a configuration issue or a connectivity device (such as a router) problem. Since it’s only affecting him, it’s probably a configuration issue. But since he hasn’t received an IP address conflict message, it’s most likely a subnet mask configuration problem.
Which of the following statements are true regarding CPUs and operating systems? (Choose two.)
A. A 64-bit OS can run on a 32-bit CPU or a 64-bit CPU.
B. A 32-bit OS can run on a 32-bit CPU or a 64-bit CPU.
C. A 32-bit OS can run only on a 32-bit CPU.
D. A 64-bit OS can run only on a 64-bit CPU.
B. A 32-bit OS can run on a 32-bit CPU or a 64-bit CPU.
D. A 64-bit OS can run only on a 64-bit CPU.
A 32-bit OS can run on either a 32-bit or 64-bit processor, although you will not be able to fully utilize the 64-bit processor’s capabilities with a 32-bit OS. A 64-bit OS will run only on a 64-bit processor.
Which of the following wireless connection types generally has a functional communication distance of 10 meters?
A. NFC
B. IR
C. Bluetooth
D. Wi-Fi
C. Bluetooth
The vast majority of consumer Bluetooth mobile devices are Class 2 devices, which have a maximum communication distance of 10 meters.
The Southbridge on a motherboard is responsible for managing which type of communications?
A. High-speed peripherals
B. Slower onboard peripherals
C. CPU to RAM
D. CPU to HDD
B. Slower onboard peripherals
The Northbridge is responsible for managing high-speed peripheral communications. The Southbridge manages slower onboard peripherals.
In your company’s lobby, there is a desktop computer with an LCD monitor that plays a continuous loop of a welcome video. The monitor is enclosed in a cabinet. Recently, the monitor will shut itself down near the end of the day, for no apparent reason. What is likely causing this problem?
A. Backlight failure
B. Incorrect video resolution
C. Video card failure
D. Monitor overheating
D. Monitor overheating
Monitors have their own internal power supply, and they can overheat. Overheating was more common with CRT displays than LCDs, but it still happens. Make sure the air vents on the back of the monitor are dust and debris free. In this case, removing the monitor from the cabinet might help. If the problem persists, it’s best to replace the monitor.
One of your network users develops software for multiple operating systems. He asks for a specialized computer that will allow him to run multiple operating systems at the same time in virtualized environments. Which two components should you optimize in his computer? (Choose two.)
A. CPU
B. RAM
C. HDD
D. GPU
A. CPU
B. RAM
This user needs a virtualization workstation. To ensure that the operating systems have the most resources possible, optimize the processors (the more cores, the better) and memory.
The design of the micro-ATX motherboard makes which of the following statements true?
A. It will fit in standard ATX cases.
B. It will fit in standard ATX cases when used with a mounting adapter kit.
C. It will fit in standard ATX cases but can’t support full-length expansion cards.
D. It will not fit in standard ATX cases.
A. It will fit in standard ATX cases.
The micro-ATX form factor is designed to work in standard ATX cases, as well as its own smaller cases.
A 32-bit PCI expansion bus will operate at one of which of the following two data rates? (Choose two.)
A. 33MBps
B. 66MBps
C. 133MBps
D. 266MBps
C. 133MBps
D. 266MBps
PCI expansion buses operate at 33MHz or 66MHz (version 2.1) over a 32-bit (4-byte) channel, resulting in data rates of 133MBps and 266MBps, respectively, with 133MBps being the most common, server architectures excluded.
What is the maximum speed of an ExpressCard 1.x card running in PCIe 1.0 x1 mode?
A. 480Mbps
B. 2.5Gbps
C. 5.0Gbps
D. 6.0Gbps
B. 2.5Gbps
ExpressCard 1.x cards running in PCIe 1.0 x1 mode have a maximum speed of 2.5Gbps. ExpressCard 1.xcards running in USB 2.0 mode have a maximum speed of 480Mbps.
Which two TCP/IP protocols are designed to download email from mail servers? (Choose two.)
A. SMTP
B. POP3
C. IMAP
D. SMB
B. POP3
C. IMAP
Simple Mail Transfer Protocol (SMTP), Post Office Protocol 3 (POP3), and Internet Message Access Protocol (IMAP) are all email protocols. SMTP is for sending email. POP3 and IMAP are for downloading email.
You are testing the power levels provided to the paper transport motor inside a laser printer. What voltage does this motor require?
A. +5VDC
B. –5VDC
C. +24VDC
D. –24VDC
C. +24VDC
The DC power supply (DCPS) converts house current into three voltages: +5VDC and –5VDC for the logic circuitry and +24VDC for the paper-transport motors.
You are examining an existing coaxial cable installation and notice that the previous technician installed a splitter. Which of the following statements is true?
A. The splitter will degrade the quality of the network signal.
B. The splitter will cause the network connection to fail.
C. The splitter will increase the distance the network signal will travel.
D. The splitter will have no effect on the network signal.
A. The splitter will degrade the quality of the network signal.
Splitters generally have two effects on a network cable: they degrade the signal and limit the distance the signal will travel. Use them judiciously.
Users on your network complain of poor wireless network access in a certain part of your building. They say that the connection is slow and disconnects frequently. You are using 802.11n wireless routers and access points. What tool should you use to troubleshoot the situation?
A. Wi-Fi analyzer
B. Protocol analyzer
C. Tone generator and probe
D. Multimeter
A. Wi-Fi analyzer
A wireless locator or a Wi-Fi analyzer can be either a handheld hardware device or specialized software that is installed on a laptop, and its purpose is to detect and analyze Wi-Fi signals.
In which scenario would you use the Fn key and the F7 key shown here?
A. To turn the screen brightness down
B. To turn the screen brightness up
C. To turn the speaker volume down
D. To turn the speaker volume up
A. To turn the screen brightness down
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. Video adjustments come in two varieties: changing the video output and dimming or brightening the screen. In this case there is a sun icon and a down arrow. Some laptops will use a smaller sun to signify dimmer and a larger sun to signify brighter or will use plus and minus signs in place of the up and down arrows.