Electronics and Communication Engineering - Digital Electronics

31. 

A 3 bit synchronous counter uses FF with propagation delay time of 20 ns each. The maximum possible time required for change of state will be.

A. 60 ns
B. 40 ns
C. 20 ns
D. None

Answer: Option B

Explanation:

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32. 

Computer ICs work reliably because

A. they are based on two state design
B. these are made from pure silicon
C. these are maintained at two temperatures
D. none of the above

Answer: Option A

Explanation:

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33. 

Octal 16 is equal to decimal

A. 13
B. 14
C. 15
D. 16

Answer: Option B

Explanation:

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34. 

The Boolean expression Y = (A + B + AB) C then Y will be equal to

A. AC
B. BC
C. C
D. none

Answer: Option C

Explanation:

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35. 

In 8085 microprocessor, how many lines are there in address bus?

A. 6
B. 8
C. 12
D. 16

Answer: Option D

Explanation:

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