Number Systems | Binary,Hexademimal,Octal,Decimal Number MCQs

1. 3 x 101 + 4 x 100 is

  1. 0.34
  2. 3.4
  3. 34
  4. 340

Answer
Answer. c

2. The decimal equivalent of 1000 is

  1. 2
  2. 4
  3. 6
  4. 8

Answer
Answer. d

3. The binary number 11011101 is equal to the decimal number

  1. 121
  2. 221
  3. 441
  4. 256

Answer
Answer. b

4. The decimal number 21 is equivalent to the binary number

  1. 10101
  2. 10001
  3. 10000
  4. 11111

Answer
Answer. a

5. The decimal number 250 is equivalent to the binary number

  1. 11111010
  2. 11110110
  3. 11111000
  4. 11111011

Answer
Answer. a

6. The sum of 1111 + 1111 in binary equals

  1. 0000
  2. 2222
  3. 11110
  4. 11111

Answer
Answer. c

7. The difference of 1000 − 100 equals

  1. 100
  2. 101
  3. 110
  4. 111

Answer
Answer. a

8. The 1’s complement of 11110000 is

  1. 11111111
  2. 11111110
  3. 00001111
  4. 10000001

Answer
Answer. c

9. The 2’s complement of 11001100 is

  1. 00110011
  2. 00110100
  3. 00110101
  4. 00110110

Answer
Answer. b

10. The decimal number + 122 is expressed in the 2’s complement form as

  1. 01111010
  2. 11111010
  3. 01000101
  4. 10000101

Answer
Answer. a

11. The decimal number − 34 is expressed in the 2’s complement form as

  1. 01011110
  2. 10100010
  3. 11011110
  4. 01011101

Answer
Answer. c

12. A single-precision floating-point binary number has a total of

  1. 8 bits
  2. 16 bits
  3. 24 bits
  4. 32 bits

Answer
Answer. d

13. In the 2’s complement form, the binary number 10010011 is equal to the decimal number

  1. −19
  2. +109
  3. +91
  4. −109

Answer
Answer. d

14. The binary number 101100111001010100001 can be written in octal as

  1. 54712308
  2. 54712418
  3. 26345218
  4. 231625018

Answer
Answer. b

15. The binary number 10001101010001101111 can be written in hexadecimal as

  1. AD46716
  2. 8C46F16
  3. 8D46F16
  4. AE46F16

Answer
Answer. c

 

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