# Digital Logic - Number representation and computer arithmetic

41:   Which of the following is an unweighted code?
 A. 8421 code B. excess 3 code C. 2421 code D. 5211 code Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:
42:

Let an , an-1 ,............ a1, a0 be the binary representation of an integer b. Then b is divisible by 3 if

 A. number of 1's  is divisible by 3 B. number of 0's  is divisible by 3 C. (c) number  of 1's of is divisible by 6 D. (a) difference of alternate sum, i.e. a0 + a2 +.........- (a1 + a2 + ...) is divisible by 3 Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
43:   Which of the following binary is equal to its l's complement ?
 A. 1010 B. 1001 C. No such number exists D. None of these Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. Write your comments here: '>
44:   Which of the following binary numbers is the same as its 2's complement?
 A. 1010 B. 0101 C. 1000 D. 1001 Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. Write your comments here: '>
45:   Which of the following statements is not true about BCD code ?
 A. Conversion to and from the decimal system can be done easily. B. It is a 8-4-2-1 weighted code C. Both (a) and (b) D. Complement of a number can be found efficiently Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here: