Electronics and Communication Engineering - Digital Electronics

21. 

DeMorgan's second theorem is

A. A . A = 0
B. A = A
C. A + B = A . B
D. AB = A + B

Answer: Option D

Explanation:

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22. 

In a D latch

A. a high D sets the latch and low D resets it
B. a low D sets the latch and high D resets it
C. race can occur
D. none of the above

Answer: Option A

Explanation:

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23. 

In floating point representation, mantissa is expressed in

A. excess 3 notation
B. gray code
C. excess 32 notation
D. 2's complement

Answer: Option C

Explanation:

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24. 

Which of the circuits in the given figure that converts JK flip flop to T flip flop?

A.
B.
C.
D.

Answer: Option A

Explanation:

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25. 

In the generic microprocessor

A. instruction cycle time period is shorter than machine cycle time period
B. machine cycle time period is shorter than instruction cycle time period
C. instruction cycle time period is exactly half of machine cycle time period
D. instruction cycle time period is exactly equal to machine cycle time period

Answer: Option B

Explanation:

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