Electronics and Communication Engineering - Microprocessors

36. 

Which of the following buses does not exist in 8085?

A. Data bus
B. Address bus
C. Control bus
D. Exchange bus

Answer: Option D

Explanation:

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37. 

The sign of a floating point number depends on

A. only the sign of mantissa
B. only the sign of exponent
C. the sign of both mantissa and exponent
D. either (a) or (b)

Answer: Option A

Explanation:

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38. 

Assertion (A): A higher level language is less efficient that machine language but more efficient than assembly language.

Reason (R): It is easier to learn and use higher level language than machine language.

A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct R is wrong
D. A is wrong R is correct

Answer: Option D

Explanation:

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39. 

The accumulator drives the ALU.

A. True
B. False

Answer: Option A

Explanation:

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40. 

System bus is the communication channel between microprocessor and peripherals.

A. True
B. False

Answer: Option A

Explanation:

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