Electronics and Communication Engineering - Microprocessors

1. 

Which of the following is a valid logical expression in Pascal?

A. 2.5 : = A
B. (A + B) < < (C + D)
C. A = < B
D. A > = B

Answer: Option D

Explanation:

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2. 

In a typical microcomputer data transfer takes place between

A. μP and memory
B. μP and I/O devices
C. memory and I/O devices
D. all of the above

Answer: Option D

Explanation:

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3. 

In 8085 the pins for + 5 V input and ground are

A. 20 and 40 respectively
B. 40 and 20 respectively
C. 1 and 2 respectively
D. 1 and 1 respectively

Answer: Option B

Explanation:

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4. 

The normalised form of 1.81 x 10-11 is

A. 18.1 x 10-12
B. 18.1 x 10-13
C. 0.181 x 10-10
D. 0.0181 x 10-9

Answer: Option C

Explanation:

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5. 

'Burst refresh' in DRAM is also called

A. Concentrated refresh
B. Distributed refresh
C. Hidden refresh
D. None of the above

Answer: Option A

Explanation:

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