Electronics and Communication Engineering - Digital Electronics

36. 

Computer virus is a piece of rough software of unknown origin that

A. copies itself like a breeding germ
B. spreads from one machine to another
C. eats away processing power
D. all of the above

Answer: Option D

Explanation:

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37. 

What is the result for expression (map method)?
ABC + AD + D (B + C) + AC + A D

A. A + D + BC
B. A + D
C. A D + B C
D. A + D + BC

Answer: Option B

Explanation:

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38. 

In a 4 bit full adder how many half adders and OR gates are required

A. 8 and 4
B. 7 and 4
C. 7 and 3
D. 8 and 3

Answer: Option C

Explanation:

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39. 

Which of the following is not a specification of D/A and A/D converters?

A. Gain
B. Drift
C. Speed
D. Accuracy

Answer: Option A

Explanation:

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40. 

Words having 8 bits are to be stored into computer memory. The number of lines required for writing into memory are

A. 1
B. 2
C. 4
D. 8

Answer: Option D

Explanation:

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