Computer Hardware MCQs

Computer

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.

430
Total Questions

Practice Questions

Page 21 of 22
Question #401
A laser mouse uses:
A. Ball
B. Laser for better surface compatibility
C. Mechanical
D. LED only
Discuss
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Correct Answer: Option B

Explanation:
Precision tracking.
This question belongs to: Computer Computer Hardware
Question #402
The purpose of a case fan is:
A. Overall system airflow
B. PSU only
C. CPU only
D. GPU only
Discuss
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Correct Answer: Option A

Explanation:
Balanced cooling.
This question belongs to: Computer Computer Hardware
Question #403
What is ' chroma subsampling' in video output?
A. Brightness control
B. Compression of color information
C. Refresh adjustment
D. Resolution scaling
Discuss
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Correct Answer: Option B

Explanation:
Affects color accuracy in HDMI.
This question belongs to: Computer Computer Hardware
Question #404
Which device is used for large engineering drawings?
A. Scanner
B. Monitor
C. Standard printer
D. Plotter
Discuss
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Correct Answer: Option D

Explanation:
Wide format output.
This question belongs to: Computer Computer Hardware
Question #405
The instruction cycle in CPU includes:
A. Display only
B. Print only
C. Store only
D. Fetch, decode, execute
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Correct Answer: Option D

Explanation:
Basic operation.
This question belongs to: Computer Computer Hardware
Question #406
What is the benefit of IPS glow?
A. It is a minor drawback actually, but IPS has good angles
B. Advantage
C. For TN
D. No glow
Discuss
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Correct Answer: Option A

Explanation:
Trade-off for viewing angles.
This question belongs to: Computer Computer Hardware
Question #407
NFC is a short-range:
A. Display tech
B. Storage
C. Printing tech
D. Input/communication technology
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Correct Answer: Option D

Explanation:
For contactless payments etc.
This question belongs to: Computer Computer Hardware
Question #408
The SATA III speed is:
A. 1.5 Gbps
B. 1 Gbps
C. 10 Gbps
D. 6 Gbps
Discuss
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Correct Answer: Option D

Explanation:
Standard for many drives.
This question belongs to: Computer Computer Hardware
Question #409
Dynamic contrast ratio in monitors is:
A. Static only
B. Color only
C. Fixed
D. Adjusted backlight for better perceived contrast
Discuss
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Correct Answer: Option D

Explanation:
Marketing vs real contrast.
This question belongs to: Computer Computer Hardware
Question #410
A 3D mouse or space mouse is used for:
A. Printing
B. Text entry
C. 2D only
D. 3D modeling and navigation
Discuss
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Correct Answer: Option D

Explanation:
CAD/CAM applications.
This question belongs to: Computer Computer Hardware
Question #411
What manages power states in hardware?
A. ACPI
B. OS only
C. BIOS only
D. Printer driver
Discuss
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Correct Answer: Option A

Explanation:
Advanced Configuration and Power Interface.
This question belongs to: Computer Computer Hardware
Question #412
The main limitation of membrane keyboards is:
A. Less tactile feedback than mechanical
B. Louder
C. Higher cost
D. Less durable
Discuss
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Correct Answer: Option A

Explanation:
Common in standard models.
This question belongs to: Computer Computer Hardware
Question #413
What is the purpose of a grounding strap when handling hardware?
A. Print labels
B. Prevent electrostatic discharge damage
C. Cool components
D. Increase speed
Discuss
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Correct Answer: Option B

Explanation:
ESD protection.
This question belongs to: Computer Computer Hardware
Question #414
Mini-LED backlighting improves:
A. Response time
B. Power negatively
C. Size
D. Local dimming and contrast in LCDs
Discuss
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Correct Answer: Option D

Explanation:
Better than traditional LED.
This question belongs to: Computer Computer Hardware
Question #415
An OMR scanner is used for:
A. Photo scanning
B. Reading marked bubbles in exams
C. Text recognition
D. Barcode
Discuss
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Correct Answer: Option B

Explanation:
Competitive exam answer sheets.
This question belongs to: Computer Computer Hardware
Question #416
The cache hit ratio indicates:
A. Display quality
B. Memory failure
C. Printer efficiency
D. Efficiency of cache usage
Discuss
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Correct Answer: Option D

Explanation:
Higher is better.
This question belongs to: Computer Computer Hardware
Question #417
What allows hot swapping of devices?
A. PS/2
B. USB, SATA with support
C. All ports
D. VGA
Discuss
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Correct Answer: Option B

Explanation:
Without reboot.
This question belongs to: Computer Computer Hardware
Question #418
The color accuracy Delta E value should be low for:
A. Professional monitors
B. Basic use
C. Office text
D. Gaming only
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Correct Answer: Option A

Explanation:
Minimal color difference.
This question belongs to: Computer Computer Hardware
Question #419
A joystick with throttle is common in:
A. Racing games only
B. Puzzle games
C. Flight simulation
D. Strategy games
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Correct Answer: Option C

Explanation:
Aviation controls.
This question belongs to: Computer Computer Hardware
Question #420
What is the function of a northbridge in older systems?
A. Slow I/O
B. Storage control
C. High speed interconnect
D. Audio
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Correct Answer: Option C

Explanation:
Memory and graphics.
This question belongs to: Computer Computer Hardware

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