Digital Logic - Number representation and computer arithmetic

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41:   Which of the following is an unweighted code?

A.	8421 code
B.	excess 3 code
C.	2421 code
D.	5211 code
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	Option: B Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

42:  

Let a_n , a_n-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
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	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

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
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	Option: C Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments.. '>

44:   Which of the following binary numbers is the same as its 2's complement?

A.	1010
B.	0101
C.	1000
D.	1001
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	Option: C Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments.. '>

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
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	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

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