Electronics and Communication Engineering - Microprocessors

1. 

In a microprocessor the clock signal

A. is always generated internally
B. is always supplied externally
C. may be generated internally or supplied externally
D. is mostly supplied externally

Answer: Option C

Explanation:

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2. 

Which of the following identifiers is invalid in Pascal?

A. BETA
B. MAX 40
C. 2ND
D. A MAX

Answer: Option C

Explanation:

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3. 

Computers 'Basic input output system' is generally stored in RAM chips.

A. True
B. False

Answer: Option A

Explanation:

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4. 

In 8085

A. the upper 8 address bits appear on address bus and lower 8 bits on address data bus
B. the lower 8 address bits appear on address bus and the upper 8 address bits appear on address data bus
C. either upper or lower 8 address bits may appear at address bus
D. either upper or lower 8 address bits may appear at address data bus

Answer: Option A

Explanation:

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5. 

If x = 0.1396 radians, the values of 1 - cos x and 2 sin2 (x / 2) using floating point arithmetic with a 4 digit mantissa are respectively

A. .1000 E - 1 each
B. .9727 E - 2 each
C. .1000 E - 1 and .9727 E - 2 respectively
D. .9727 E - 2 and .1000 E - 1 respectively

Answer: Option C

Explanation:

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