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Q.

In general, the source operand of an instruction can be

A

memory location

B

register

C

immediate data

D

all of the mentioned

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MCQ

1.

The flag that acts as Borrow flag in the instruction, SBB is

A

direction flag

B

carry flag

C

parity flag

D

trap flag

Discussion

MCQ

2.

The instruction that subtracts 1 from the contents of the specified register/memory location is

A

INC

B

SUBB

C

SUB

D

DEC

Discussion

MCQ

3.

The instruction that adds immediate data/contents of the memory location specified in an instruction/register to the contents of another register/memory location is

A

SUB

B

ADD

C

MUL

D

DIV

Discussion

MCQ

4.

The instructions that are used for reading an input port and writing an output port respectively are

A

MOV, XCHG

B

MOV, IN

C

IN, MOV

D

IN, OUT

Discussion

MCQ

5.

The instruction that is used for finding out the codes in case of code conversion problems is

A

XCHG

B

XLAT

C

XOR

D

JCXZ

Discussion

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