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MCQ

Q.

In POP instruction, after each execution of the instruction, the stack pointer is

A

incremented by 1

B

decremented by 1

C

incremented by 2

D

decremented by 2

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MCQ

1.

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

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2.

The instruction that loads effective address formed by destination operand into the specified source register is

A

LEA

B

LDS

C

LES

D

LAHF

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3.

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

A

INC

B

SUBB

C

SUB

D

DEC

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4.

The instructions that involve various string manipulation operations are

A

branch instructions

B

flag manipulation instructions

C

shift and rotate instructions

D

string instructions

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5.

The mnemonic that is placed before the arithmetic operation is performed is

A

AAA

B

AAS

C

AAM

D

AAD

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