Digital Computer Electronics – Section 2

11. The 2’s complement of binary number 010111.1100 is

A. 101001.1100
B. 101000.0100
C. 010111.0011
D. 101000.0011
E. None of the above

12. In boolean algebra, the times sign stands for the _____ operation

A. AND
B. OR
C. NAND
D. NOR
E. None of the above

13. What logic function is obtained by adding an inverter to the output of an AND gate?

A. OR
B. NAND
C. XOR
D. NOR
E. None of the above

14. Conversion of an octal number 7432₈ to a binary number is

A. 1111000110111₂
B. 111100011010₂
C. 110011010111₂
D. 111111111000₂
E. None of the above

15. Conversion of an octal number 143₈ to hexadecimal number is

A. 63₁₆
B. 60₁₆
C. 50₁₆
D. 57₁₆
E. None of the above