ITC 235 test questions
Amy has a new LCD monitor. She says that the monitor isn't displaying the whole picture. What is the recommended resolution for her to use?
1920 x 1080
How much data can a double side layer Bluetooth device hold?
25 gb
How much power is consumed by a load drawing 5 A with 120 V across it?
600 w
Two types of screen resolutions that can be used by VGA mode?
640x480 and 1920x1080
What is a reasonable wattage capacity for a power supply to be used with a system that contains a DVD drive, three hard drives, and a high-end video card?
700 W
You upgrade a faulty PCIe video card to a recently released higher-performing card. Now the user complains that Windows 10 hangs a lot and gives errors. Which is the most likely source of the problem? Which is the least likely source?
A component of the computer is overheating Most likely Memory is faulty Least Likely
You suspect that a power supply is faulty, but you use a power supply tester to measure its voltage output and find it to be acceptable. Why is it still possible that the power supply may be faulty?
A power supply test will only tell you if it is bad.
Describe the parts of a magnetic hard disk
Actuator moves the read/write heads across the disk surfaces Read/write head moves across the disk surface as all the disks rotate on a spindle Platters stack together and spin in unison inside a sealed metal housing that contains firmware to control reading and writing data
How do you determine the wattage capacity needed by a power supply?
Add wattage requirements of all components and add 30%.
You own a small computer repair company and a customer comes to you with a laptop that will not boot. After investigating, you discover the hard drive has crashed. What should you do first?
Ask the customer's advice about the size of the drive to install, but select a drive that's the same speed as the original drive.
Your boss assigns you a trouble ticket that says a computer is randomly shutting off after about 15 minutes of use. You have a theory that the computer is overheating. What utility program can you use to read system temperatures?
BIOS/UEFI
What is a barcode reader and how are they typically connected to a computer
Barcode readers are used to scan barcodes at the POS or when taking inventory. Connected to a computer by either USB port, serial port, keyboard port, or wireless connection
You want to install an SSD in your desktop computer, but the drive is far too narrow to fit snugly into the bays of your computer case. Which of the following do you do?
Buy a bay adapter that will allow you to install the narrow drive in a desktop case bay.
Easiest way to tell if a USB port on a laptop computer is using USB 3.0 standard?
Check the color of the port, which is blue
You have just installed a new sound card in your system, and Windows says the card installed with no errors. When you plug up the speakers and try to play a music CD, you hear no sound. What is the first thing you should do? The second thing?
Check the volume controls on the speaker amplifier and in Windows. Use Device Manager to update the sound card drivers.
Your user complains about password problem, they cannot get their password right.
Check whether the number log key (num lock), it won't show that its off.
Describe what a hybrid hard drive is?
Contains both magnetic and SSD technologies. The magnetic drive in the drive housing permanently holds data while the flash component serves as a buffer to improve drive performance.
Which Windows utility is most likely the best one to use when uninstalling an expansion card?
Device manager
Why do hard drives tend to slow down over time?
Drives can reach full capacity, which hinders where data can be written to the drive. SSDs must erase a block before a block can be written. Magnetic drives take longer when having to read data from noncontiguous locations on the drive.
Which is the fastest connection used by current external hard drives. What is the speed?
E-sata verison 3. 6gb/ps
You suspect a component in a computer is fried. You remove any unnecessary hardware devices one by one to narrow down where the problem exists. Which step in the troubleshooting process is this?
Examine the system.
If the power connector from the CPU fan has only three pins, it can still connect to the 4-pin header, but what functionality is lost?
Fan will always operate at the same speed.
What is the installation of a new device known as? Describe this process
Formatting. A process that erases all data on the device or drive.
Your friend Suzy calls to ask for help with her computer. She says when she first turns on the computer, she doesn't hear a spinning drive or fan or see indicator lights, and the monitor is blank. Is the problem hardware- or software related?
Hardware related
Describe how an SSD works?
Has no moving parts. Built using non-volatile memory. Flash memory is stored in chips on a circuit board inside the drive housing. The chips contain grids and rows and columns with two transistors at each intersection that hold a 0 or 1 bit.
Your customer, Mykel, is ordering a custom-built computer for his home office and isn't sure which components should be the highest priority to meet his needs. He's a software developer and runs multiple VMs to test his applications. He also designs some of his own graphics, and he plays online games when he's not working. Which of the following priorities would be most important for Mykel's computer?
High-end CPU, lots of RAM, and high-end graphics card
You are setting up a RAID system in a server designed for optimum fault tolerance, accuracy, and minimal downtime. Which HDD is best for this system, assuming the motherboard supports it?
Hot-swap 3.5ʺ SATA 3.0 10,000-RPM drive
What is a biometric device and how is it used
Input biological data about a person to identify the person's fingerprint, handprint, face, voice, eye, or handwritten signature. Can be used to access Windows or use Touch ID technology
What is KVM switch, and how might one be useful
Keyboard, video, mouse switch allows you to use one keyboard, monitor, and mouse for multiple computers. Can be useful in a server room or testing lab where you use more than one computer and want less clutter on the desk space
What type of wireless transmission does the device use to receive encrypted data
NFC Connection
Your friend has a Lenovo IdeaPad N580 laptop and the hard drive has failed. Her uncle has offered to give her a working hard drive he no longer needs., the Toshiba MK80009GAH 80-GB 4200 RPM drive. Will this drive fit her laptop? Why or why not?
No, the drive form factor and interface do not match
Which gives more glare OLED or LCD?
OLED
Your boss wants a new type of monitor in the office which has a wall of windows. He is concerned about considerable glare. Which gives less glare LED or OLED monitors?
OLED
You have just installed a new DVD drive and its drivers in Windows 10. The drive will read a CD but not a DVD. You decide to reinstall the device drivers. What is the first thing you do?
Open Device Manager and uninstall the drive.
Which of the following is fastest?
PCIe NVMe SSD card
Why should a power supply be rated about 30 percent higher than expected needs?
Power supplies that run at less than peak performance last longer and don't overheat
Which two components in a system might make a loud whining noise when there is a problem? Why?
Power supply or failing hard drive. Might be a short or the power supply is going bad or is underrated for the system.
You have two matching HDDs in a system, which you plan to configure as a RAID array to improve performance. Which RAID configuration should you choose?
RAID 0
Which of the following situations allows for data not to be lost in a RAID array?
RAID 1 and one hard drive fails
Which RAID level stripes data across multiple drives to improve performance and provides fault tolerance?
RAID 5
You are working on a server in a server room and need to connect to a keyboard. The port available is a 9-pin serial port. What type of port is this?
RS-232 Port or DB-9 Port
Which type of drivers must always be certified in order to be installed on Windows?
Signed drivers
How does LED backlighting work? How can you tell?
Some LCD displays used LED backlighting to improve display quality and conserve power. Has an LED lighting array directly behind the viewing surface. You can tell if a monitor uses them by seeing the lights.
What are the three factors you should consider when purchasing a hard drive that affects your performance, use, and price
Spindle speed, cache or buffer size, and interface standard, price,
Your customer Maggie wants to buy a gaming PC and she specifically mentions that she wants an Intel CPU and intends to overclock the CPU. How can you identify which Intel CPUs are capable of overclocking? What are the two other components that must be selected with overclocking in mind?
The 'K' in the processor model number indicates that the processor can be overclocked. RAM and GPU must be considered?
You install an M.2 SSD card in an M.2 slot on a motherboard. When you boot up the system, you discover the DVD drive no longer works. What are likely causes of this problem? Select two.
The DVD drive SATA connector is disabled. The DVD drive cable is loose or disconnected.
What speaker port should be used to connect a single speaker to a computer?
The green sound port
Explain how a DVD manufacturer can advertise that a DVD can hold 4.7 GB, but Explorer reports the DVD capacity as 4,706,074,624 bytes or 4.38 GB
The manufacturer measures capacity in decimal and the OS measures capacity in binary.
When you boot up a computer and hear a single beep, but the screen is blank, what can you assume is the source of the problem?
The monitor or monitor cable
Why is it best to leave a slot empty between two expansion cards?
To help with airflow between the slots
What are two reasons to tie cables up and out of the way inside a computer case?
To keep proper airflow and prevent cabled from getting in the way of turning fans.
You install a SATA hard drive and then turn on the computer for the first time. You access BIOS/UEFI setup and see that the drive is not recognized. Which of the following do you do next?
Turn off the computer, open the case, and verify that the data cable and power cable are connected correctly.
What can you do if a port on the motherboard is faulty and a device requires this type of port?
Turn to device manager to see if errors are reported and to update the drivers for the port or slot
What should you immediately do if you turn on a computer and smell smoke or a burning odor?
Unplug the computer
A laptop has an SD card slot that no longer reads cards inserted in the slot. Which is the first and best solution to try?
Update Windows on the laptop.
Your desktop computer has DVI and HDMI video port. If a DVI monitor does not work on your system and yet you know the monitor is good, what is the best solution?
Use a DVI to HDMI adapter to use the current DVI monitor and cable
You discover Event Viewer has been reporting hard drive errors for about one month. What is the first solution you should try to fix the problem?
Use the chkdsk (check disk) command to repair the drive.
How does an OLED monitor work?
Uses a thin LED layer or film between two grids of electrodes and does not use backlighting. Does not emit as much light as an LCD monitor.
You've decided to build a new gaming computer and are researching which power supply to buy. Which component in a high-end gaming computer is likely to draw the most power? What factor in a power supply do you need to consider to make sure this component has strong enough wattage?
Video card. 12 +V Rail
You have four 2.5ʺ hard drives on hand and need a replacement drive for a desktop system. The documentation for the motherboard installed in the system says the board has six SATA 3 Gb/s connectors and one IDE connector. Which of the four hard drives will work in the system and yield the best performance?
WD 3.5ʺ 7200-RPM SATA 3.0 HDD
Someone asks you for help with a computer that hangs at odd times. You turn it on and work for about 15 minutes, and then the computer freezes and powers down. What do you do first?
Wait about 30 minutes for the system to cool down and try again.
As a help-desk technician, list four good detective questions to ask if a user calls to say, "My computer won't boot."
What error messages, unusual displays, or failures did you see? When did the problem start? Does the system have a history of similar problems? What was the situation when the problem occured?
You turn on your windows computer and see the system display POST messages. Then the screen goes blank with no text. Which of the following items could be the source of the problem?
Windows
You plug a new scanner into a USB port on your Windows system. When you first turn on the scanner what should you expect to see?
Windows Device Setup launches to install drivers
Would you expect all the devices listed in BIOS/UEFI setup to be also listed in Device Manager? Would you expect all devices listed in Device Manager to also be listed in BIOS/UEFI setup?
Yes, no
What is a display port?
is a digital audio and video interface created by VESA. Its connections come in two varieties: standard, (shown in the picture) and the smaller Mini DisplayPort.
