MCQs on Number System, Boolean algebra
1. 2’s complement of the number 1010101 is
- 0101010
- 0101011
- 1101010
- 1110011
2. Multiplication of two binary numbers 011 and 110 is
- 10010
- 11001
- 11100
- 01110
3. The octal equivalent of decimal 98 is
- 89
- 98
- 142
- 241
4. Multiplication of two binary numbers A and B is 11011. If A = 011, B is
- 0101
- 1100
- 1001
- 1011
5. The binary equivalent of hexadecimal number 4F2D is
- 0101 1111 0010 1100
- 0100 1111 0010 1100
- 0100 1110 0010 1101
- 0100 1111 0010 1101
6. The decimal equivalent of octal number 1431 is
- 793
- 739
- 379
- 397
7. The decimal equivalent of hexadecimal number 2A0Fis
- 17670
- 17607
- 17067
- 10767
8. The 4-bit group that is used in excess-3 code is
- 0001
- 0011
- 0010
- 1110
9. Which of the following is correct in regard to excess-3 code?
- It is a BCD code
- It is an unweighted code
- It is a self-complementing code
- All of the above.
10. BCD code is
- a binary code
- unweighted code
- the same as binary numbers
- the same as gray code
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