# Digital Logic - Number representation and computer arithmetic

56:

The binary equivalent of the octal numbers 13.54 is

 A. 1011.1011 B. 1101.1110 C. 1000.1110 D. all of these Answer Report Discuss Option: A Explanation : Click on Discuss to view users comments. Write your comments here:
57:   The octal equivalent of 111 010 is
 A. 81 B. 72 C. 71 D. all of these Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:
58:

Consider excess-3 code that is used to represent integers 0 through 9 as shown below :

 Number Code ( a b c d ) 0 1100 1 0010 2 1010 3 0110 4 1110 5 0001 6 1001 7 0101 8 1101 9 0011

Which of the following expressions is the correct one for an invalid code ?

 A. b' . c' . d' + c . d B. b' . c' . d' + a . c . d C. b' . c' . d' + b . c . d + a . c . d + b' . c' . d' D. b' . c' . d' + b . c . d + a . c . d Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. Write your comments here:
59:

in 2's complement addition , overflow

 A. is flagged whenever there is carry from sign bit addition B. cannot occue when a positive value is added to a negative value C. is flagged when the carries from sign bit and previous bit match D. none of these Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:

X