Exercise: Microprocessors

Questions for: Microprocessors

The addressing mode depicted in the given figure is
A:
direct
B:
register
C:
register indirect
D:
immediate
Answer: C
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The operations which occur most frequently in a computer are
A:
fetch
B:
execute
C:
both (a) and (b)
D:
none of the above
Answer: C
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Assertion (A): In 8085, the zero flag is set when ALU operation results in 0. If the result is not 0, this flag is reset.

Reason (R): In 8085 the S flag is set when the contents of accumulator become negative during execution of an instruction.

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
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In IC 74181 a sum greater than 15 leads to low carry out.
A:
True
B:
False
C:
D:
Answer: A
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Assertion (A): In C it is possible for functions to call themselves.

Reason (R): C makes use of 'Pointers'.

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: B
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