Classical

Digital Logic - Sequential Circuits

16:   For which of the following flip-flops, the output is clearly defined for all combinations of two inputs ?
A. Q type flip-flop
B. R-S flip-lop
C. J-K flip-lop
D. D flip-flop
 
 

Option: C

Explanation :


17:   When a large number of analog signals are to be converted an analog multiplexer is used. In this case most suitable A.D. converter will be
A. Ripple carry counter type
B. Dual stop type
C. Forward counter type
D. Successive approximation type
 
 

Option: D

Explanation :


18:   To build a mod-19 counter the number of flip-flops required is
A. 3
B. 5
C. 7
D. 9
 
 

Option: B

Explanation :


19:   The astable multivibrator has
A. Two quasi stable states
B. Two stable states
C. One stable and one quasi-stable state
D. None of these
 
 

Option: A

Explanation :


20:   How many bits are required to encode all twenty six letters, ten symbols, and ten numerals ?
A. 5
B. 6
C. 10
D. 48
 
 

Option: B

Explanation :




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