Exercise: Microprocessors

Questions for: Microprocessors

Assertion (A): Microprocessor 8085 has on-chip oscillator with inbuilt crystal.

Reason (R): For frequency stability crystal oscillator is preferred.

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: D

Crystal has to be connected externally to pins 1 and 2 of 8085.

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Assertion (A): If source and destination addresses are made implicit the length of instruction is reduced.

Reason (R): 8085 has only 3 addressing modes.

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: C

The number of addressing modes is five.

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In which computer language is 'break' statement used
A:
Fortran 77
B:
Pascal
C:
C
D:
none of the above
Answer: C

Whenever keyword 'break' is encountered inside any C loop control passes to the first statement after the loop.

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Temporary register in 8085 is a 16 bit register.
A:
True
B:
False
C:
D:
Answer: B

It is 8 bit-register.

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Which of the following real variable names is not valid in Fortran?
A:
BETA
B:
ALPHA
C:
A
D:
AB * 2
Answer: D

Operator is not allowed.

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