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. LED only
C. Mechanical
D. Laser for better surface compatibility
Discuss
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Correct Answer: Option D

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

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

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

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

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

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

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

Explanation:
Standard for many drives.
This question belongs to: Computer Computer Hardware
Question #409
Dynamic contrast ratio in monitors is:
A. Fixed
B. Static only
C. Color only
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. 3D modeling and navigation
C. 2D only
D. Text entry
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Correct Answer: Option B

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

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. Less durable
C. Louder
D. Higher cost
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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. Increase speed
B. Prevent electrostatic discharge damage
C. Cool components
D. Print labels
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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. Power negatively
B. Size
C. Local dimming and contrast in LCDs
D. Response time
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Correct Answer: Option C

Explanation:
Better than traditional LED.
This question belongs to: Computer Computer Hardware
Question #415
An OMR scanner is used for:
A. Barcode
B. Reading marked bubbles in exams
C. Text recognition
D. Photo scanning
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. Printer efficiency
B. Memory failure
C. Display quality
D. Efficiency of cache usage
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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. VGA
B. PS/2
C. USB, SATA with support
D. All ports
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Correct Answer: Option C

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

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

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

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

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