# 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

2. The decimal equivalent of 1000 is

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

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

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

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

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

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

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

6. The sum of 1111 + 1111 in binary equals

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

7. The difference of 1000 − 100 equals

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

8. The 1’s complement of 11110000 is

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

9. The 2’s complement of 11001100 is

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

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

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

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

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

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

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

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

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

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

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

2. 8C46F16
3. 8D46F16
4. AE46F16