Classical

Digital Logic - Number representation and computer arithmetic

31:   If (x567)8+(12yx 5)8=(71yx)8, then
values of x and y are
A. 4, 4
B. 3, 3
C. 4, 3
D. None of these
 
 

Option: C

Explanation :


32:  

Which of the following is the binary representation of the hexadecimal number 3B7F?

A.

0100 1001 1110 1101

B.

0011 1011 0111 1111

C.

1111 1011 0111 1001

D.

0010 0100 0000 1010

 
 

Option: B

Explanation :


33:   In 2's complement representation, a certain negative number -N is 1011. The representation of +N is
A. 0100
B. 0101
C. 0110
D. 1111
 
 

Option: B

Explanation :

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34:  

The expression for sum of A, B in the half adder is given by

A.

AB

B.

A + B

C.

A ⊕ B

D.

None of these

 
 

Option: C

Explanation :


35:  

 Which of the following is true about BCD ?

A.

It is a 8-4-2-1 weighted code

B.

(1234567)10 needs 4 bytes in BCD representation

C.

Conversion to and from the decimal system can be done easily

D.

All of these

 
 

Option: D

Explanation :




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