Practice exam (1) Flashcards
You are investigating computer specifications for a new desktop workstation. If the specifications include 256 KB of L2 cache, approximately how much L1 cache would it be reasonable to expect the computer to have?
64 KB
256 KB
512 KB
64 KB
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?
9100
721
443
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 do to fix this problem?
Replace the speakers
Replace the sound card
Replace the phone
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 settings for volume as well as possible redirection of sound, such as an active Bluetooth pairing. 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 few concerns. What disadvantages do SSDs have versus HDDs? (Choose two)
They produce more heat
They are more expensive
They are more susceptible to damage
They have less capacity
They are more expensive
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 wide screen television aspect ratios?
16: 9, yes
16: 9, no
16: 10, yes
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)
Scratch in the EP drum
Fusing assembly not heating up properly
Worn exit rollers
Dirty charging corona wire
Scratch in the EP drum
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 are installing an ATX power supply. Which of the following is not a voltage provided by the power supply?
-3.3 VDC
+5 VDC
-12 VDC
-3.3 VDC
ATX power supplies provide the following voltages for the computer: +3.3 VDC, +5 VDC, –5 VDC (on older systems), +12 VDC, and –12 VDC. The 12 V 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?
RAM
Hard drive
BIOS
RAM
Memory problems can cause system lockups, unexpected shutdowns or reboots, or errors such as the 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?
Check to see whether the network card driver is responding
Use the Loopback plug to test the network card
Check to ensure that the network cable is plugged in
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 corporate server. However, he is still able to print to a local printer. 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?
Incorrect subnet mask
IP address conflict
Default gateway is down
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 64-bit OS can run on a 32-bit CPU or a 64-bit CPU
A 32-bit OS can run on a 32-bit CPU or a 64-bit CPU
A 32-bit OS can run only on a 32-bit CPU
A 64-bit OS can run only on a 64-bit CPU
A 32-bit OS can run on a 32-bit CPU or a 64-bit CPU
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 connections types generally has a functional communications distance of 10 meters?
NFC
IR
Bluetooth
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?
High-speed peripherals
Slower onboard peripherals
CPU to HDD
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 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 most likely causing this problem?
Backlight failure
Video card failure
Monitor overheating
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)
CPU
RAM
HDD
GPU
CPU
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 a micro-ATX motherboard makes which of the following statements is true?
It will fit in standard ATX cases
It will fit in standard ATX cases when used with a mounting adapter kit
It will not fit in standard ATX cases
It will fit in standard ATX cases
The MicroATX 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)
33 MBps
66 MBps
133 MBps
266 MBps
133 MBps
266 MBps
PCI expansion buses operate at 33 MHz or 66 MHz (version 2.1) over a 32-bit (4-byte) channel, resulting in data rates of 133 MBps and 266 MBps, respectively, with 133 MBps being the most common, server architectures excluded
What is the maximum speed of an ExpressCard 2.0 card running in PCIe 2.0 x1 mode?
- 5 Gbps
- 0 Gbps
- 0 Gbps
5.0 Gbps
ExpressCard 2.0 running in PCIe 2.0 has a maximum speed of 5.0. GExpressCard 1.x cards running in PCIe 1.0 x1 mode have a maximum speed of 2.5 Gbps. ExpressCard 1.x cards running in USB 2.0 mode have a maximum speed of 480 Mbps
Which two TCP/IP protocols are designed to download email from mail servers? (Choose two)
SMTP
POP3
IMAP
SMB
POP3
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 monitor inside a laser printer. What voltage does this monitor require?
+5 VDC
+24 VDC
-24 VDC
+24 VDC
The DC power supply (DCPS) converts house current into three voltages: +5 VDC and –5 VDC for the logic circuitry and +24 VDC for the paper-transport motors
What type of converter requires power, either from its own source or from the interface it plugs into?
DVI to HDMI
PS/2 to USB
HDMI to VGA
HDMI to VGA
VGA devices are analog and therefore cannot be driven passively by digital HDMI ports directly. An HDMI-to-VGA adapter must be active in nature, either powered externally or through the HDMI interface itself
During the charging step of the laser printer printing process, what charge is applied to the imaging drum?
- 100 VDC
- 600 VDC
+600 VDC
-600 VDC
During the charging step, the charging corona uses a high voltage to apply a strong, uniform negative charge (around –600 VDC) to the surface of the imaging drum
You are purchasing a mobile device that requires the use of a stylus to input information; it does not respond to the touch of a finger. What type of touch screen technology does this device use?
Tempered
Resistive
Capacitive
Resistive
Resistive touch screens respond to pressure, and they are highly accurate in detecting the position of the touch. These types of touch screens require the use of a stylus or other hard object, such as a fingernail
What is the maximum data throughout rate of a SATA 3 hard drive?
1.5 Gbps
3 Gbps
6 Gbps
6 Gbps
SATA 1 has throughput of 1.5 Gbps, SATA 2 is rated at 3 Gbps, and SATA 3 is rated at 6 Gbps. SATA speeds can be confusing because the naming does not line up well with the data rates
You are purchasing a new LCD monitor for a small conference room. It will be viewed by people sitting at wide angles to the screen. Which technology should you purchase?
LED
TN
IPS
IPS
The two most popular methods of manufacturing LCD panels are twisted nematic (TN) and in-plane switching (IPS). Of the two, IPS is regarded as having the best color representation in all angles, while TN is faster and less expensive. Fluorescent and LED are types of backlighting
A technician needs to choose an optical disc technology that provides storage space possible. Which technology will best meet her needs?
DVD+R DS, DL
BD-R DS, DL
BD-R SS, SL
BD-R DS, DL
Of the three optical disc technologies, Blu-ray provides the most capacity over DVD and CD-ROM. Blu-ray double-sided, dual-layer (DS, DL) provides 100 GB of storage space, whereas single-sided, single-layer (SS, SL) provides 25 GB
