Computer Basics

Ladakh Police Sub-Inspector · Computer Proficiency · 306 practice questions with answers and explanations: 133 Easy, 94 Medium, 79 Hard.

Sample questions

Sample Easy question 1

Who developed the Ethernet networking technology?

  1. Steve Jobs
  2. Larry Page
  3. Robert Metcalfe
  4. Charles Babbage
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Answer: C. Robert Metcalfe developed the Ethernet networking technology.

Sample Easy question 2

Who co-founded Microsoft with Paul Allen?

  1. Bjarne Stroustrup
  2. Bill Gates
  3. Dennis Ritchie
  4. Linus Torvalds
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Answer: B. Bill Gates co-founded Microsoft with Paul Allen.

Sample Easy question 3

Who founded Facebook?

  1. Steve Jobs
  2. Alan Turing
  3. Tim Berners-Lee
  4. Mark Zuckerberg
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Answer: D. Mark Zuckerberg founded Facebook.

Sample Medium question 4

The octal equivalent of the decimal number 55 is:

  1. 66
  2. 67
  3. 77
  4. 70
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Answer: B. 55 = 67 in octal.

Sample Medium question 5

The octal equivalent of the decimal number 42 is:

  1. 62
  2. 52
  3. 53
  4. 51
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Answer: B. 42 = 52 in octal.

Sample Medium question 6

The binary number 10111 is equal to which octal number?

  1. 26
  2. 30
  3. 37
  4. 27
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Answer: D. Group the bits in threes: 10111₂ = 27₈.

Sample Hard question 7

What is the sum of the hexadecimal numbers 1A2 and 66C?

  1. 80F
  2. 802
  3. 80E
  4. 81B
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Answer: C. In decimal 418 + 1644 = 2062, which is 80E in hexadecimal.

Sample Hard question 8

What is the sum of the hexadecimal numbers 209 and 615?

  1. 81A
  2. 82B
  3. 828
  4. 81E
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Answer: D. In decimal 521 + 1557 = 2078, which is 81E in hexadecimal.

Sample Hard question 9

What is the sum of the hexadecimal numbers 132 and 214?

  1. 350
  2. 344
  3. 351
  4. 346
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Answer: D. In decimal 306 + 532 = 838, which is 346 in hexadecimal.

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