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Computer MCQs (page 22 of 48)

Computer basics, hardware, software, networking, the internet, file formats, shortcuts and the people behind modern computing.

Practise 10 questions Timed test

954 questions. Select an option to check your answer, or open "Show answer". Showing 421–440.

  1. 421.

    What is the binary equivalent of decimal 240?

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    Answer: B. 11110000

    240 = 128 + 64 + 32 + 16, so in binary it is 11110000.

  2. 422.

    What is the binary equivalent of decimal 241?

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    Answer: B. 11110001

    241 = 128 + 64 + 32 + 16 + 1, so in binary it is 11110001.

  3. 423.

    What is the binary equivalent of decimal 242?

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    Answer: B. 11110010

    242 = 128 + 64 + 32 + 16 + 2, so in binary it is 11110010.

  4. 424.

    What is the binary equivalent of decimal 244?

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    Answer: C. 11110100

    244 = 128 + 64 + 32 + 16 + 4, so in binary it is 11110100.

  5. 425.

    What is the binary equivalent of decimal 245?

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    Answer: C. 11110101

    245 = 128 + 64 + 32 + 16 + 4 + 1, so in binary it is 11110101.

  7. 426.

    What is the binary equivalent of decimal 246?

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    Answer: C. 11110110

    246 = 128 + 64 + 32 + 16 + 4 + 2, so in binary it is 11110110.

  8. 427.

    What is the binary equivalent of decimal 248?

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    Answer: C. 11111000

    248 = 128 + 64 + 32 + 16 + 8, so in binary it is 11111000.

  9. 428.

    What is the binary equivalent of decimal 250?

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    Answer: A. 11111010

    250 = 128 + 64 + 32 + 16 + 8 + 2, so in binary it is 11111010.

  10. 429.

    What is the binary equivalent of decimal 254?

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    Answer: C. 11111110

    254 = 128 + 64 + 32 + 16 + 8 + 4 + 2, so in binary it is 11111110.

  11. 430.

    What is the decimal value of the binary number 100?

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    Answer: B. 4

    100 = 4 = 4.

  12. 431.

    What is the decimal value of the binary number 111?

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    Answer: B. 7

    111 = 4 + 2 + 1 = 7.

  13. 432.

    What is the decimal value of the binary number 1101?

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    Answer: C. 13

    1101 = 8 + 4 + 1 = 13.

  14. 433.

    What is the decimal value of the binary number 1110?

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    Answer: B. 14

    1110 = 8 + 4 + 2 = 14.

  15. 434.

    What is the decimal value of the binary number 1111?

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    Answer: C. 15

    1111 = 8 + 4 + 2 + 1 = 15.

  16. 435.

    What is the decimal value of the binary number 10000?

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    Answer: C. 16

    10000 = 16 = 16.

  18. 436.

    What is the decimal value of the binary number 10001?

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    Answer: C. 17

    10001 = 16 + 1 = 17.

  19. 437.

    What is the decimal value of the binary number 10101?

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    Answer: B. 21

    10101 = 16 + 4 + 1 = 21.

  20. 438.

    What is the decimal value of the binary number 10111?

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    Answer: A. 23

    10111 = 16 + 4 + 2 + 1 = 23.

  21. 439.

    What is the decimal value of the binary number 11000?

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    Answer: B. 24

    11000 = 16 + 8 = 24.

  22. 440.

    What is the decimal value of the binary number 11010?

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    Answer: C. 26

    11010 = 16 + 8 + 2 = 26.