What is the decimal equivalent of octal 15? MCQ with Answer and Explanation

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What is the decimal equivalent of octal 15?

A. 13

B. 15

C. 16

D. 14

Answer: Option A

Solution (By JKSSB Mock Tests)

Octal 15 = 1*8 + 5 = 13 decimal.

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Question #1

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Which computing generation is explicitly associated with Very Large Scale Integration (VLSI) technology and the rise of personal home computers (PCs)?

A. Second Generation

B. Fourth Generation

C. Fifth Generation

D. Third Generation

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Correct Answer: Option B

Explanation:
The Fourth Generation brought VLSI microprocessors into production, making small, affordable personal home computers a reality.

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Question #2

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What is the main advantage of integrated circuits over transistors?

A. Smaller size and lower cost

B. Easier to manufacture

C. Higher speed only

D. More reliable but slower

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Correct Answer: Option A

Explanation:
ICs pack many transistors into a small chip, reducing size and cost, while increasing reliability.

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Question #3

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What is the decimal equivalent of binary 1001?

A. 10

B. 8

C. 9

D. 11

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Correct Answer: Option C

Explanation:
1001 = 8+1 = 9.

This question belongs to: Computer Computer Fundamentals

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