Electronics and Communication Engineering - Digital Electronics

6. 

D FF can be used as a

A. differentiator
B. divider circuit
C. delay switch
D. none

Answer: Option C

Explanation:

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7. 

In flip flops the duration of clock pulse is about

A. 3 ns
B. 10 ns
C. 25 ns
D. 50 ns

Answer: Option A

Explanation:

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8. 

Which of the following is decimal equivalent of the binary 1111111?

A. 27
B. 87
C. 127
D. 167

Answer: Option C

Explanation:

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9. 

A 555 timer can be used as

A. an astable multivibrator
B. monostable multivibrator
C. frequency Divider only
D. any of the above

Answer: Option D

Explanation:

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10. 

Which of the following statements defines a full adder?

A. It adds two binary digits and produces their SUM and CARRY
B. It adds three inputs (two binary digits and a carry) and produces their SUM and CARRY
C. It has two inputs and two outputs
D. None of the above

Answer: Option B

Explanation:

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