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MCQ

Which of the following is not a machine controlled instruction?

HLT

CLC

LOCK

ESC

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The expansion of DAA is

decimal adjust after addition

decimal adjust before addition

decimal adjust accumulator

decimal adjust auxiliary

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The instruction that is used to convert the result of the addition of two packed BCD numbers to a valid BCD number is

DAA

DAS

AAA

AAS

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The instruction that pushes the contents of the specified register/memory location on to the stack is

PUSHF

POPF

PUSH

POP

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In the RCL instruction, the contents of the destination operand undergo function as

carry flag is pushed into LSB & MSB is pushed into the carry flag

carry flag is pushed into MSB & LSB is pushed into the carry flag

auxiliary flag is pushed into LSB & MSB is pushed into the carry flag

parity flag is pushed into MSB & LSB is pushed into the carry flag

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MCQ

Which of the following is not a data copy/transfer instruction?

MOV

PUSH

DAS

POP

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category More Microprocessor Topics

Microprocessor Basics

Classification

Input Output interfacing

Microcontroller

8085 Architecture

8086 Microprocessor

Multiprocessor Configuration

Peripheral Interface

Register Set of 8051

Serial Communication Unit

Segmentation

Paging

Instruction Set of 8086 8088

Interrupt and Stack of 8051

8051 Instruction Set

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