Digital Logic - Number representation and computer arithmetic

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4. 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
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	Option: A Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

57:   The octal equivalent of 111 010 is

A.	81
B.	72
C.	71
D.	all of these
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	Option: B Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

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

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
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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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