Exercise: Microprocessors

Questions for: Microprocessors

In 8085, which of the following registers cannot be paired?
A:
A
B:
E
C:
C
D:
both (b) and (c)
Answer: A
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If N = 196, the result of the following program will be

INTEGER N, DIGIT 1, DIGIT 2, DIGIT 3,
SUM
READ*, N
DIGIT 1 = N - (N / 10)* 10 N = N / 10
DIGIT 2 = N - (N / 10)* 10 N = N / 10
DIGIT 3 = N - (N / 10)* 10
SUM = DIGIT 1 + DIGIT 2 + DIGIT 3
A:
196
B:
16
C:
16.0
D:
196.0
Answer: B
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Which of the following methods does not cause any reduction in instruction length?
A:
Using program counter
B:
Common source and destination address
C:
Implicit source and destination address
D:
Machine language programming
Answer: D
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Consider the following statement in Fortran 77

READ *, (X.(I), I = 0, 4)

 Which of the following is correct?
A:
3 values would be read and stored in X (0), X (1), X (2)
B:
4 values would be read and stored in X (0), X (1), X (2), X (3)
C:
5 values would be read and stored in X (0), X (1), X (2), (3)(4)
D:
5 values would be read and stored in X (I), X (2), X (3), X (4), X (5)
Answer: C
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A mP contains 2 MHz crystal. The time taken to complete instructions with 1000 cycles is
A:
2 ms
B:
1 ms
C:
2 nx
D:
1 ns
Answer: B
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