Computer Fundamentals MCQs

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Computer Fundamentals MCQs

Practice Computer Fundamentals MCQs with answers and detailed explanations covering computer basics, characteristics, types of computers, generations of computers and fundamental concepts frequently asked in SSC, Railway, Banking, UPSC, JKSSB and other competitive exams.

326
Total Questions

Practice Questions

Page 16 of 17
Question #301
Which of the following is a component of a CPU?
A. Hard disk
B. ALU
C. RAM
D. Power supply
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Correct Answer: Option B

Explanation:
ALU is part of the CPU; RAM and hard disk are separate components.
This question belongs to: Computer Computer Fundamentals
Question #302
What is the decimal equivalent of hexadecimal 10?
A. 16
B. 17
C. 19
D. 18
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Correct Answer: Option A

Explanation:
Hex 10 = 1*16 + 0 = 16 decimal.
This question belongs to: Computer Computer Fundamentals
Question #303
Which generation of computers used machine language and assembly language?
A. Fourth
B. Second
C. First
D. Third
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Correct Answer: Option C

Explanation:
First-generation computers used machine language; second used assembly as well.
This question belongs to: Computer Computer Fundamentals
Question #304
What is the purpose of a register in a CPU?
A. To perform arithmetic
B. To control input/output
C. To manage memory
D. To store temporary data and instructions
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Correct Answer: Option D

Explanation:
Registers are small, fast storage locations for temporary data during processing.
This question belongs to: Computer Computer Fundamentals
Question #305
Which of the following is a characteristic of a hybrid computer?
A. Uses both analog and digital signals
B. Is slower than digital
C. Uses only digital
D. Uses only analog
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Correct Answer: Option A

Explanation:
Hybrid computers combine analog and digital processing capabilities.
This question belongs to: Computer Computer Fundamentals
Question #306
What is the binary equivalent of decimal 15?
A. 1011
B. 1110
C. 1101
D. 1111
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Correct Answer: Option D

Explanation:
15 = 8+4+2+1 = 1111.
This question belongs to: Computer Computer Fundamentals
Question #307
Which of the following is an example of a smart card?
A. Flash drive
B. CD-ROM
C. Credit card with chip
D. Hard disk
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Correct Answer: Option C

Explanation:
Smart cards contain an embedded chip for data processing, unlike magnetic stripe cards.
This question belongs to: Computer Computer Fundamentals
Question #308
What is the purpose of the control bus?
A. Transfers data
B. Transfers power
C. Transfers control signals
D. Transfers addresses
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Correct Answer: Option C

Explanation:
The control bus carries control signals (e.g., read/write) from the CPU to other components.
This question belongs to: Computer Computer Fundamentals
Question #309
What is the octal equivalent of decimal 50?
A. 65
B. 64
C. 62
D. 63
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Correct Answer: Option C

Explanation:
50 = 6*8 + 2 = 62 octal.
This question belongs to: Computer Computer Fundamentals
Question #310
What is the function of the address bus?
A. Carries power
B. Carries data
C. Carries memory addresses
D. Carries control signals
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Correct Answer: Option C

Explanation:
The address bus carries the address of the memory location being accessed.
This question belongs to: Computer Computer Fundamentals
Question #311
Which of the following is a characteristic of a minicomputer?
A. Lowest cost
B. Single-user
C. Used only for scientific research
D. Smaller than mainframe but larger than micro
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Correct Answer: Option D

Explanation:
Minicomputers are mid-range systems, smaller than mainframes but larger than microcomputers.
This question belongs to: Computer Computer Fundamentals
Question #312
What is the decimal equivalent of binary 11111?
A. 33
B. 30
C. 32
D. 31
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Correct Answer: Option D

Explanation:
11111 = 16+8+4+2+1 = 31.
This question belongs to: Computer Computer Fundamentals
Question #313
Which of the following is an example of an output device for hard copy?
A. Speaker
B. Projector
C. Monitor
D. Printer
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Correct Answer: Option D

Explanation:
A printer produces hard copy (physical) output.
This question belongs to: Computer Computer Fundamentals
Question #314
What is the binary equivalent of decimal 255?
A. 11111100
B. 11111111
C. 11111000
D. 11111110
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Correct Answer: Option B

Explanation:
255 = 128+64+32+16+8+4+2+1 = 11111111.
This question belongs to: Computer Computer Fundamentals
Question #315
Which generation of computers used magnetic tape for storage?
A. Second
B. Third
C. First
D. All of the above
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Correct Answer: Option D

Explanation:
Magnetic tape was used in first, second, and third generations for backup and storage.
This question belongs to: Computer Computer Fundamentals
Question #316
What is the purpose of the power-on self-test (POST)?
A. Checks hardware functionality
B. Installs drivers
C. Loads the OS
D. Checks for viruses
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Correct Answer: Option A

Explanation:
POST runs diagnostics on hardware like RAM and drives to ensure they work before booting.
This question belongs to: Computer Computer Fundamentals
Question #317
Which of the following is not a characteristic of fifth-generation computers?
A. Artificial intelligence
B. Parallel processing
C. Natural language processing
D. Vacuum tubes
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Correct Answer: Option D

Explanation:
Fifth-generation computers do not use vacuum tubes; they use advanced VLSI and AI.
This question belongs to: Computer Computer Fundamentals
Question #318
What is the octal equivalent of binary 101010?
A. 53
B. 52
C. 54
D. 55
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Correct Answer: Option B

Explanation:
101010 = 101 010 = 5 2 = 52 octal.
This question belongs to: Computer Computer Fundamentals
Question #319
What is the decimal equivalent of hexadecimal FF?
A. 253
B. 254
C. 256
D. 255
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Correct Answer: Option D

Explanation:
FF = 15*16 + 15 = 255.
This question belongs to: Computer Computer Fundamentals
Question #320
Which of the following is an example of an optical storage device?
A. Flash drive
B. SSD
C. Hard disk
D. CD-ROM
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Correct Answer: Option D

Explanation:
CD-ROM is an optical storage medium using laser to read data.
This question belongs to: Computer Computer Fundamentals

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