Electronics and Communication Engineering - Digital Electronics

26. 

To have the multiprocessing capabilities of the 8086 microprocessor, the pin connected to the ground is

A. DEN
B. ALE
C. INTER
D.

Answer: Option D

Explanation:

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27. 

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: Option D

Explanation:

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28. 

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: Option B

Explanation:

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29. 

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: Option A

Explanation:

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30. 

A half adder adds __________ bits and a full adder adds __________ bits.

A. two, three
B. three, four
C. four, six
D. two, four

Answer: Option A

Explanation:

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