Electronics and Communication Engineering - Microprocessors

1. 

The number of computer viruses is some thousands.

A. True
B. False

Answer: Option A

Explanation:

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2. 

If 8085 is required to add two 32 bit numbers, the numbers of addition sequences is

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

Answer: Option C

Explanation:

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3. 

Incompatibility between memory and I/O device may be due to

A. timing according to which data transfer is to take place
B. electrical characteristics of the two devices
C. format of data transfer
D. all of the above

Answer: Option D

Explanation:

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4. 

When the mains supply is switched off the contents of primary computer memory are lost.

A. True
B. False

Answer: Option A

Explanation:

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5. 

8255 A is a

A. programmable peripheral interface
B. I/O device
C. memory chip
D. none of the above

Answer: Option A

Explanation:

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