Microprocessors - Section 1 (5)

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Microprocessors - Section 1

33.

In a computer the instructions, data, intermediate and final results during processing are held in ALU.

A.	True
B.	False

Answer: Option B

Explanation:

These are not held in ALU. Only computations are done by ALU.

34.

Which of the following is not a valid real constant in C?

A.	1.2 e 2.0
B.	-2.3 e - 2
C.	-2.3 E 2
D.	-2.3 e 2

Answer: Option C

Explanation:

In C real constant expressed in exponential form, mantissia and exponent should be separated by e (and not E).

35.

The power requirements of a DRAM in active and stand by modes is about

A.	350 mW and 5 mW respectively
B.	350 mW each
C.	5 mW each
D.	350 mW and 100 mW respectively

Answer: Option A

Explanation:

Power requirement in stand by mode is very low 1000.

36.

Z flag is reset if an ALU operation results in 0.

A.	True
B.	False

Answer: Option B

Explanation:

Z flag is set if ALU operation results in zero.

37.

During processing the instructions, data, intermediate results and final results in a computer are held in

A.	CPU
B.	ALU
C.	Primary memory
D.	Secondary memory

Answer: Option C

Explanation:

Primary memory holds these during processing of instructions.

38.

Which of the following computer memories is fastest?

A.	Cache
B.	Primary
C.	Mass storage
D.	Off line back up

Answer: Option A

Explanation:

Cache memory has a speed of about four times the speed of main memory. It is a small high speed memory.

39.

The size of cache memory in most microcomputers is about

A.	a few bytes
B.	a few kilobytes
C.	a few megabytes
D.	a few gigabytes

Answer: Option B

Explanation:

Size of Cache memory varies from about 16 K bytes to about 256 K bytes.

40.

Computer virus can hide itself in a diskette but not in a hard disk.

A.	True
B.	False

Answer: Option B

Explanation:

Computer virus can hide in hard disk also.

Microprocessors - Section 1 (5)

Microprocessors - Section 1

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