Electronics and Communication Engineering - Digital Electronics

1. 

A buffer is a device that isolates other devices. Typically a buffer has

A. a high input impedance and a low output impedance
B. a high input impedance as well as output impedance
C. a low input impedance and a high output impedance
D. a low input impedance as well as output impedance

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

2. 

Which of the following is used as switch?

A. J-K flip-flop
B. Master slave J-K flip-flop
C. T-flip-flop
D. D-flip-flop

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

3. 

In a positive edge triggered D flip flop

A. D input is called direct set
B. Preset is called direct reset
C. Present and clear are called direct set and reset respectively
D. D input overrides other inputs

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

4. 

The first contribution to logic was made by

A. George Boole
B. Copernicus
C. Aristotle
D. Shannon

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

5. 

Average latency time of magnetic tape memory is of the order of

A. 1 μ sec
B. 1 msec
C. 1 sec
D. 1 minute

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

1 2 3 4 5 6 7 8 9 10 Next »