Exercise: Digital Electronics

Questions for: Digital Electronics

2's complement of a given 3 or more bit number of non-zero magnitude is the same as the original number if all bits except
A:
MSB are zero
B:
LSB are zero
C:
MSB are 1
D:
LSB are 1
Answer: A
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Assuming accumulator contain A 64 and the carry is set (1). What will register A and carry (CY) contain after ORA A?
A:
A 6 H, 1
B:
A 6 H, 0
C:
00 H, 0
D:
00 H, 1
Answer: B
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An index register in digital computer is a register to be used for
A:
performing arithmetic and logic operations
B:
temporary storage of result
C:
counting number of times a program is executed
D:
address modification purpose
Answer: D
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To have the multiprocessing capabilities of the 8086 microprocessor, the pin connected to the ground is
A:
DEN
B:
ALE
C:
INTER
D:
Answer: D
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What is the purpose of using ALE signal high?
A:
To latch low order address from bus to separate A0 - A7 lines
B:
To latch data D0 - D7 from bus to separate data bus
C:
To disable data bus latch
D:
All of the above
Answer: A
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