ITC 235 test questions and answers.
What is the installation of a new device known as? Describe this process correct answers
Formatting. A process that erases all data on the device or drive.
Why should a power supply be rated about 30 percent higher than expected needs? correct
answers Power supplies that run at less than peak performance last longer and don't overheat
What is KVM switch, and how might one be useful correct answers 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 is a barcode reader and how are they typically connected to a computer correct answers
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
How does LED backlighting work? How can you tell? correct answers 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 is a display port? correct answers 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.
What is a biometric device and how is it used correct answers 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
How does an OLED monitor work? correct answers 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.
Describe the parts of a magnetic hard disk correct answers 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
Describe what a hybrid hard drive is? correct answers 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.
Describe how an SSD works? correct answers 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.
What are the three factors you should consider when purchasing a hard drive that affects your
performance, use, and price correct answers Spindle speed, cache or buffer size, and interface
standard, price,
How much data can a double side layer Bluetooth device hold? correct answers 25 gb
Which gives more glare OLED or LCD? correct answers OLED
Your user complains about password problem, they cannot get their password right. correct
answers Check whether the number log key (num lock), it won't show that its off.
How much power is consumed by a load drawing 5 A with 120 V across it? correct answers 600
w
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? correct answers 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? correct answers A component of the computer is
overheating Most likely
Memory is faulty Least Likely
What should you immediately do if you turn on a computer and smell smoke or a burning odor?
correct answers Unplug the computer
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? correct answers The monitor or monitor cable
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? correct answers A power supply test will only tell you if it is bad.
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? correct
answers Wait about 30 minutes for the system to cool down and try again.
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?
correct answers 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.
What is the installation of a new device known as? Describe this process correct answers
Formatting. A process that erases all data on the device or drive.
Why should a power supply be rated about 30 percent higher than expected needs? correct
answers Power supplies that run at less than peak performance last longer and don't overheat
What is KVM switch, and how might one be useful correct answers 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 is a barcode reader and how are they typically connected to a computer correct answers
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
How does LED backlighting work? How can you tell? correct answers 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 is a display port? correct answers 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.
What is a biometric device and how is it used correct answers 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
How does an OLED monitor work? correct answers 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.
Describe the parts of a magnetic hard disk correct answers 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
Describe what a hybrid hard drive is? correct answers 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.
Describe how an SSD works? correct answers 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.
What are the three factors you should consider when purchasing a hard drive that affects your
performance, use, and price correct answers Spindle speed, cache or buffer size, and interface
standard, price,
How much data can a double side layer Bluetooth device hold? correct answers 25 gb
Which gives more glare OLED or LCD? correct answers OLED
Your user complains about password problem, they cannot get their password right. correct
answers Check whether the number log key (num lock), it won't show that its off.
How much power is consumed by a load drawing 5 A with 120 V across it? correct answers 600
w
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? correct answers 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? correct answers A component of the computer is
overheating Most likely
Memory is faulty Least Likely
What should you immediately do if you turn on a computer and smell smoke or a burning odor?
correct answers Unplug the computer
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? correct answers The monitor or monitor cable
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? correct answers A power supply test will only tell you if it is bad.
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? correct
answers Wait about 30 minutes for the system to cool down and try again.
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?
correct answers 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.
