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.

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Total Questions

Practice Questions

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

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

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

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

Explanation:
Ensures data consistency.
This question belongs to: Computer Computer Hardware
Question #365
What is the advantage of pigment-based inks?
A. Cheaper
B. Faster drying
C. Brighter colors always
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. Scanners
B. Desktops only
C. Laptops for video output
D. Printers
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Correct Answer: Option C

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

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

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

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

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

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. 10W
B. 50W max
C. 1000W
D. 150-450W
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Correct Answer: Option D

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

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. 60Hz
C. 144Hz
D. 30Hz
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Correct Answer: Option B

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

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

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

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

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

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

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