Computer Fundamentals MCQs

Computer

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 15 of 17
Question #281
Which of the following is an advantage of digital computers over analog?
A. Easier to program
B. Less expensive
C. Higher accuracy
D. Faster processing
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Correct Answer: Option C

Explanation:
Digital computers offer higher accuracy because they represent data discretely.
This question belongs to: Computer Computer Fundamentals
Question #282
Which generation of computers used VLSI technology?
A. Third
B. Fifth
C. Second
D. Fourth
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Correct Answer: Option D

Explanation:
Fourth-generation computers used VLSI (Very Large Scale Integration) technology.
This question belongs to: Computer Computer Fundamentals
Question #283
What is the decimal equivalent of hexadecimal 2B?
A. 43
B. 46
C. 44
D. 45
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Correct Answer: Option A

Explanation:
2B = 2*16 + 11 = 32+11 = 43.
This question belongs to: Computer Computer Fundamentals
Question #284
What is the function of the kernel in an OS?
A. Provides user interface
B. Manages hardware and core functions
C. Runs applications
D. Connects to internet
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Correct Answer: Option B

Explanation:
The kernel is the core of the OS, managing hardware resources and system services.
This question belongs to: Computer Computer Fundamentals
Question #285
Which of the following is a type of computer based on size?
A. Mainframe
B. Hybrid
C. Digital
D. Analog
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Correct Answer: Option A

Explanation:
Mainframe is a size-based classification (along with micro, mini, super).
This question belongs to: Computer Computer Fundamentals
Question #286
What is the binary equivalent of hexadecimal 5C?
A. 1011011
B. 1011010
C. 1011100
D. 1101100
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Correct Answer: Option C

Explanation:
5C = 5 (0101) and C (1100) -> 01011100 = 1011100.
This question belongs to: Computer Computer Fundamentals
Question #287
Which component is used to hold the CPU's frequently used data?
A. Registers
B. RAM
C. Cache memory
D. Hard disk
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Correct Answer: Option C

Explanation:
Cache memory holds frequently accessed data for quick CPU access.
This question belongs to: Computer Computer Fundamentals
Question #288
Which of the following is an example of a general-purpose computer?
A. Digital watch
B. Laptop
C. Smart thermostat
D. Medical monitor
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Correct Answer: Option B

Explanation:
A laptop is a general-purpose computer capable of running various applications.
This question belongs to: Computer Computer Fundamentals
Question #289
What is the octal equivalent of decimal 64?
A. 100
B. 110
C. 111
D. 101
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Correct Answer: Option A

Explanation:
64 decimal = 100 octal (1*64 + 0*8 + 0).
This question belongs to: Computer Computer Fundamentals
Question #290
Which of the following is not a function of the CPU?
A. Decoding instructions
B. Storing data permanently
C. Fetching instructions
D. Executing instructions
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Correct Answer: Option B

Explanation:
Permanent storage is a function of secondary storage, not the CPU.
This question belongs to: Computer Computer Fundamentals
Question #291
What is the purpose of a cache in a CPU?
A. To reduce memory access time
B. To increase memory capacity
C. To store backup data
D. To manage power
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Correct Answer: Option A

Explanation:
Cache reduces latency by storing copies of frequently used data.
This question belongs to: Computer Computer Fundamentals
Question #292
Which of the following is a characteristic of an embedded system?
A. Dedicated function
B. General-purpose
C. Large size
D. High cost
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Correct Answer: Option A

Explanation:
Embedded systems are designed for specific dedicated functions.
This question belongs to: Computer Computer Fundamentals
Question #293
What is the decimal equivalent of binary 10101?
A. 23
B. 21
C. 24
D. 22
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Correct Answer: Option B

Explanation:
10101 = 16+4+1 = 21.
This question belongs to: Computer Computer Fundamentals
Question #294
Which generation of computers used transistors and magnetic core memory?
A. Fourth
B. Third
C. First
D. Second
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Correct Answer: Option D

Explanation:
Second-generation computers used transistors and magnetic core memory.
This question belongs to: Computer Computer Fundamentals
Question #295
What is the role of the I/O controller?
A. Controls system clock
B. Stores instructions
C. Performs arithmetic
D. Manages data flow between CPU and peripherals
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Correct Answer: Option D

Explanation:
I/O controllers manage data transfer between the CPU and input/output devices.
This question belongs to: Computer Computer Fundamentals
Question #296
Which of the following is a type of computer based on functionality?
A. Desktop
B. Analog
C. Mainframe
D. Minicomputer
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Correct Answer: Option B

Explanation:
Analog, digital, and hybrid are based on functionality (data processing method).
This question belongs to: Computer Computer Fundamentals
Question #297
What is the hexadecimal equivalent of binary 111000?
A. 38
B. 3B
C. 3A
D. 39
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Correct Answer: Option A

Explanation:
111000 = 0011 1000 = 38 hex.
This question belongs to: Computer Computer Fundamentals
Question #298
What is the purpose of a bus in a computer?
A. To execute instructions
B. To transfer data between components
C. To store data
D. To cool the system
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Correct Answer: Option B

Explanation:
A bus is a communication system that transfers data between components.
This question belongs to: Computer Computer Fundamentals
Question #299
Which of the following is an example of a volatile storage?
A. Flash drive
B. CD-ROM
C. Hard disk
D. RAM
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Correct Answer: Option D

Explanation:
RAM is volatile; it loses data when power is removed.
This question belongs to: Computer Computer Fundamentals
Question #300
What is the octal equivalent of binary 110?
A. 5
B. 7
C. 6
D. 4
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Correct Answer: Option C

Explanation:
110 binary = 6 decimal = 6 octal.
This question belongs to: Computer Computer Fundamentals

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