Digital Logic - Sequential Circuits

21:   The dynamic hazard problem occurs in
A. Combinational circuit alone
B. Sequential circuit only
C. Both (a) and (b)
D. None of these
 
 

Option: C

Explanation :

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22:  

A n-stage ripple counter will count up to

A.

2n

B.

2n-1

C.

n

D.

2n-1

 
 

Option: A

Explanation :

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23:   The clock signals are used in sequential logic circuits to
A. Tell the time of the day
B. Tell how much time has elapsed since the system was turned on
C. Carry parllel data signals
D. Synchronize events in various parts of system
 
 

Option: D

Explanation :

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24:   74L5138 chip functions as
A. Decoder/demultiplexer
B. Encoder
C. Multiplexer
D. Demultiplexer
 
 

Option: A

Explanation :

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25:   A sequential circuit outputs a ONE when an even number (> 0) of one's are input; otherwise the output is ZERO. The minimum number of states required is
A. 0
B. 1
C. 2
D. None of these
 
 

Option: C

Explanation :

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