Classical

Digital Logic - Combinational Circuits

36:   A combinational circuit is one in which the output depends on the
A. input combination at the time
B. input combination and the previous output
C. input combination at that time and the previous input combination
D. present output and the previous output
 
 

Option: A

Explanation :


37:   The function of a multiplexer is
A. to decode information
B. to select 1 out of N input data sources and to transmit it to single channel
C. to transit data on N lines
D. to perform serial to parallel conversion
 
 

Option: B

Explanation :


38:  

A combinational logic circuit which generates a particular binary word or number is

A.

Decoder

B.

Multiplexer

C.

Encoder

D.

Demultiplexer

 
 

Option: A

Explanation :


39:   Which of the following circuit can be used as parallel to serial converter ?
A. Multiplexer
B. Demultiplexer
C. Decoder
D. Digital counter
 
 

Option: A

Explanation :


40:   In which of the following adder circuits, the carry look ripple delay is eliminated ?
A. Half adder
B. Full adder
C. Parallel adder
D. Carry-look-ahead adder
 
 

Option: C

Explanation :




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