What is the base of the octal number system? MCQ with Answer and Explanation

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What is the base of the octal number system?

A. 8

B. 10

C. 2

D. 16

Answer: Option A

Solution (By JKSSB Mock Tests)

The octal system has a base of 8, using digits 0 to 7.

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Question #1

What is the hexadecimal equivalent of decimal 15?

A. E

B. F

C. 10

D. 15

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Correct Answer: Option B

Explanation:
In hexadecimal, decimal 15 is represented as F.

This question belongs to: Computer Computer Fundamentals

Question #2

Which of the following is a characteristic of secondary storage?

A. Directly accessible by CPU

B. Volatile

C. Non-volatile

D. High speed

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Correct Answer: Option C

Explanation:
Secondary storage is non-volatile, retaining data even when power is off.

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Question #3

A type of memory whose contents are permanently etched during manufacturing and cannot be easily rewritten or wiped when power is turned off is:

A. Cache Memory

B. ROM

C. RAM

D. Virtual Memory

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Correct Answer: Option B

Explanation:
ROM (Read-Only Memory) is non-volatile; its embedded code remains safe and intact even when the machine loses power completely.

This question belongs to: Computer Computer Fundamentals

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