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41. Which of the following is an unweighted code?
8421 code
excess 3 code
2421 code
5211 code
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42. Let an , an-1 ,............ a1, a0 be the binary representation of an integer b. Then b is divisible by 3 if
number of 1's is divisible by 3
number of 0's is divisible by 3
number of 1's of is divisible by 6
difference of alternate sum, i.e. a0 + a2 +.........- (a1 + a2 + ...) is divisible by 3
43. Which of the following binary is equal to its l's complement ?
1010
1001
No such number exists
None of these
44. Which of the following binary numbers is the same as its 2's complement?
0101
1000
45. Which of the following statements is not true about BCD code ?
Conversion to and from the decimal system can be done easily
It is a 8-4-2-1 weighted code
Both (a) and (b)
Complement of a number can be found efficiently
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