Computer Hardware MCQs

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Computer Hardware MCQs

Practice Computer Hardware MCQs with answers and detailed explanations covering input devices, output devices, scanners, printers, keyboards, monitors and computer hardware components frequently asked in competitive examinations.

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Total Questions

Practice Questions

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Question #21
What does the term 'resolution' refer to in monitors?
A. Number of pixels on the screen
B. Brightness level
C. Refresh rate
D. Number of colors displayed
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Correct Answer: Option A

Explanation:
Resolution is the total number of pixels (e.g., 1920x1080).
This question belongs to: Computer Computer Hardware
Question #22
Which hardware component is responsible for executing arithmetic and logical operations?
A. CU
B. MU
C. ALU
D. I/O Unit
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Correct Answer: Option C

Explanation:
Arithmetic Logic Unit (ALU) performs calculations and logical operations.
This question belongs to: Computer Computer Hardware
Question #23
A device that produces sound output is called:
A. Monitor
B. Keyboard
C. Speaker
D. Scanner
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Correct Answer: Option C

Explanation:
Speakers are audio output devices.
This question belongs to: Computer Computer Hardware
Question #24
What is the main disadvantage of CRT monitors compared to LCD?
A. Lower resolution
B. Higher cost
C. Poor color accuracy
D. Bulkier and heavier
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Correct Answer: Option D

Explanation:
CRT monitors are bulkier due to the cathode ray tube technology.
This question belongs to: Computer Computer Hardware
Question #25
Which memory is used to store BIOS instructions?
A. HDD
B. ROM
C. RAM
D. Cache
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Correct Answer: Option B

Explanation:
ROM contains firmware like BIOS which is non-volatile.
This question belongs to: Computer Computer Hardware
Question #26
Optical Mouse uses which technology to detect movement?
A. Mechanical ball
B. Ultrasonic waves
C. LED and sensor
D. Magnetic field
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Correct Answer: Option C

Explanation:
Optical mice use light-emitting diodes and sensors.
This question belongs to: Computer Computer Hardware
Question #27
What is the function of a graphics card?
A. To store data
B. To render images and videos
C. To connect networks
D. To process sound
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Correct Answer: Option B

Explanation:
GPU (Graphics Processing Unit) handles visual rendering.
This question belongs to: Computer Computer Hardware
Question #28
Inkjet printers are best suited for:
A. Fast text documents only
B. Large format blueprints
C. Photo quality color printing
D. High-volume black and white printing
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Correct Answer: Option C

Explanation:
Inkjet printers excel in high-quality color prints like photos.
This question belongs to: Computer Computer Hardware
Question #29
Which component connects the CPU to other parts of the motherboard?
A. North Bridge
B. South Bridge
C. Front Side Bus
D. All of the above
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Correct Answer: Option D

Explanation:
Bridges and buses facilitate communication on the motherboard.
This question belongs to: Computer Computer Hardware
Question #30
What type of device is a webcam?
A. Storage device
B. Processing device
C. Input device
D. Output device
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Correct Answer: Option C

Explanation:
Webcam captures video input for the computer.
This question belongs to: Computer Computer Hardware
Question #31
EEPROM stands for:
A. Extended Error Erasable Memory
B. Electronically Enhanced Primary Output Memory
C. Electrically Erasable Programmable Read Only Memory
D. External Extended Processing Memory
Discuss
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Correct Answer: Option C

Explanation:
EEPROM is a type of non-volatile memory that can be electrically erased and reprogrammed.
This question belongs to: Computer Computer Hardware
Question #32
Which printer is impact-based and noisy?
A. 3D Printer
B. Laser Printer
C. Dot Matrix Printer
D. Inkjet Printer
Discuss
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Correct Answer: Option C

Explanation:
Dot matrix printers use impact technology creating noise.
This question belongs to: Computer Computer Hardware
Question #33
The speed of a processor is measured in:
A. DPI
B. Hertz (Hz)
C. Pixels
D. Bytes
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Correct Answer: Option B

Explanation:
Clock speed of CPU is measured in GHz (gigahertz).
This question belongs to: Computer Computer Hardware
Question #34
What is the primary use of a digitizer tablet?
A. Projecting slides
B. Scanning documents
C. Printing high-resolution images
D. Drawing with a stylus for precise input
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Correct Answer: Option D

Explanation:
Digitizer or graphics tablet is used for precise digital drawing.
This question belongs to: Computer Computer Hardware
Question #35
Which of the following is a volatile storage device?
A. SSD
B. CD-ROM
C. RAM
D. Flash Drive
Discuss
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Correct Answer: Option C

Explanation:
RAM loses data without power.
This question belongs to: Computer Computer Hardware
Question #36
OLED monitors are known for:
A. Excellent contrast and thin design
B. Low resolution
C. Being very expensive only for servers
D. High power consumption
Discuss
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Correct Answer: Option A

Explanation:
OLED provides better blacks and thinner panels.
This question belongs to: Computer Computer Hardware
Question #37
What does MICR stand for in banking hardware?
A. Memory Input Character Reader
B. Modern Ink Color Reader
C. Magnetic Ink Character Recognition
D. Magnetic Input Card Reader
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Correct Answer: Option C

Explanation:
MICR is used in cheque processing.
This question belongs to: Computer Computer Hardware
Question #38
The brain of the computer is:
A. Hard Disk
B. Monitor
C. CPU
D. Keyboard
Discuss
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Correct Answer: Option C

Explanation:
CPU processes all instructions.
This question belongs to: Computer Computer Hardware
Question #39
Which device uses toner for printing?
A. Inkjet
B. Thermal
C. Laser
D. Dot Matrix
Discuss
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Correct Answer: Option C

Explanation:
Laser printers use toner powder.
This question belongs to: Computer Computer Hardware
Question #40
What is the purpose of heat sink in computer hardware?
A. To increase processing speed
B. To connect peripherals
C. To store additional data
D. To dissipate heat from CPU
Discuss
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Correct Answer: Option D

Explanation:
Heat sinks prevent overheating of processors.
This question belongs to: Computer Computer Hardware

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