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 19 of 22
Question #361
What is the role of a DMA controller?
A. CPU intensive tasks
B. Direct data transfer bypassing CPU
C. Audio mixing
D. Graphics only
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Correct Answer: Option B

Explanation:
Efficiency in I/O.
This question belongs to: Computer Computer Hardware
Question #362
Quantum dot technology in monitors improves:
A. Size only
B. Response time
C. Power consumption negatively
D. Color volume and brightness
Discuss
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Correct Answer: Option D

Explanation:
Vibrant colors.
This question belongs to: Computer Computer Hardware
Question #363
A common input for POS systems is:
A. Mouse only
B. Joystick
C. Standard keyboard
D. Touchscreen and barcode scanner
Discuss
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Correct Answer: Option D

Explanation:
Retail efficiency.
This question belongs to: Computer Computer Hardware
Question #364
The cache coherence problem is managed by:
A. HDD
B. Single core only
C. RAM
D. Multi-core CPU protocols
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Correct Answer: Option D

Explanation:
Ensures data consistency.
This question belongs to: Computer Computer Hardware
Question #365
What is the advantage of pigment-based inks?
A. Faster drying
B. Brighter colors always
C. Cheaper
D. Better longevity and water resistance
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Correct Answer: Option D

Explanation:
For archival prints.
This question belongs to: Computer Computer Hardware
Question #366
Mini DisplayPort is used in:
A. Laptops for video output
B. Desktops only
C. Scanners
D. Printers
Discuss
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Correct Answer: Option A

Explanation:
Compact connector.
This question belongs to: Computer Computer Hardware
Question #367
The main reason for using ECC RAM in workstations is:
A. Error correction for critical applications
B. Lower price
C. Aesthetics
D. Gaming performance
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Correct Answer: Option A

Explanation:
Data accuracy.
This question belongs to: Computer Computer Hardware
Question #368
What does a KVM over IP allow?
A. Local only
B. Printing remote
C. Remote hardware access
D. Scanning remote
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Correct Answer: Option C

Explanation:
Data center management.
This question belongs to: Computer Computer Hardware
Question #369
OLED burn-in is mitigated by:
A. Higher brightness
B. Static images
C. No mitigation needed
D. Pixel shift and screen savers
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Correct Answer: Option D

Explanation:
Usage precautions.
This question belongs to: Computer Computer Hardware
Question #370
A force feedback joystick provides:
A. Tactile sensations in games
B. Printing
C. Audio only
D. Visual feedback
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Correct Answer: Option A

Explanation:
Immersive gaming.
This question belongs to: Computer Computer Hardware
Question #371
The chipset on modern motherboards is often:
A. Non-existent
B. Single chip or integrated
C. Multiple bridges always
D. CPU only
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Correct Answer: Option B

Explanation:
Simplified architecture.
This question belongs to: Computer Computer Hardware
Question #372
What is the typical power draw of a high-end graphics card?
A. 50W max
B. 150-450W
C. 1000W
D. 10W
Discuss
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Correct Answer: Option B

Explanation:
Requires adequate PSU.
This question belongs to: Computer Computer Hardware
Question #373
Which scanner feature allows book scanning without damage?
A. Sheet fed
B. Flatbed only
C. Book edge or overhead scanner
D. Handheld
Discuss
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Correct Answer: Option C

Explanation:
Preserves bindings.
This question belongs to: Computer Computer Hardware
Question #374
AVX instructions in CPU are for:
A. Graphics only
B. Advanced vector extensions for parallel computing
C. Basic operations
D. Storage
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Correct Answer: Option B

Explanation:
Scientific and multimedia.
This question belongs to: Computer Computer Hardware
Question #375
The refresh rate for standard office monitors is usually:
A. 240Hz
B. 30Hz
C. 144Hz
D. 60Hz
Discuss
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Correct Answer: Option D

Explanation:
Sufficient for productivity.
This question belongs to: Computer Computer Hardware
Question #376
A smart card reader is used for:
A. Secure authentication with chip cards
B. Scanning photos
C. Printing
D. Mouse input
Discuss
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Correct Answer: Option A

Explanation:
Banking and ID.
This question belongs to: Computer Computer Hardware
Question #377
What is the function of a voltage regulator in PSU?
A. Increase power
B. Cool air
C. Stable output voltages
D. Store energy
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Correct Answer: Option C

Explanation:
Protects components.
This question belongs to: Computer Computer Hardware
Question #378
Curved monitors reduce:
A. Distortion at edges for wide screens
B. Cost
C. Weight
D. Brightness
Discuss
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Correct Answer: Option A

Explanation:
Immersive experience.
This question belongs to: Computer Computer Hardware
Question #379
The primary storage for OS and applications should be:
A. Optical disc
B. HDD only
C. Tape
D. Fast SSD
Discuss
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Correct Answer: Option D

Explanation:
Quick boot and loading.
This question belongs to: Computer Computer Hardware
Question #380
What does 'duplex' mean in printing context?
A. Double resolution
B. Color only
C. Fast mode
D. Double-sided printing
Discuss
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Correct Answer: Option D

Explanation:
Eco-friendly.
This question belongs to: Computer Computer Hardware

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