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Welcome to the 8086 Instruction Set MCQs Page

Dive deep into the fascinating world of 8086 Instruction Set with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of 8086 Instruction Set, a crucial aspect of Microprocessor. In this section, you will encounter a diverse range of MCQs that cover various aspects of 8086 Instruction Set, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Microprocessor.

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Check out the MCQs below to embark on an enriching journey through 8086 Instruction Set. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Microprocessor.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of 8086 Instruction Set. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

8086 Instruction Set MCQs | Page 2 of 9

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Q11.
The instruction that loads the AH register with the lower byte of the flag register is

a.

SAHF

b.

AH

c.

LAHF

d.

PUSHF

Discuss
Answer: (c).LAHF
Q12.
The instruction that pushes the flag register on to the stack is

a.

PUSH

b.

POP

c.

PUSHF

d.

POPF

Discuss
Answer: (c).PUSHF
Q13.
The instruction that loads the flag register completely from the word contents of the memory location is

a.

PUSH

b.

POP

c.

PUSHF

d.

POPF

Discuss
Answer: (d).POPF
Q14.
The instruction that adds immediate data/contents of memory location specified in an instruction/register to the contents of another register/memory location is

a.

SUB

b.

ADD

c.

MUL

d.

DIV

Discuss
Answer: (b).ADD
Q15.
The instruction that supports addition when carry exists is

a.

ADD

b.

ADC

c.

ADD & ADC

d.

none of the mentioned

Discuss
Answer: (b).ADC
Q16.
The instruction, “INC” increases the contents of the specified register or memory location by

a.

2

b.

0

c.

1

d.

3

Discuss
Answer: (c).1
Q17.
The instruction that subtracts 1 from the contents of the specified register/memory location is

a.

INC

b.

SUBB

c.

SUB

d.

DEC

Discuss
Answer: (d).DEC
Q18.
The instruction that enables subtraction with borrow is

a.

DEC

b.

SUB

c.

SBB

d.

None of the mentioned

Discuss
Answer: (c).SBB
Q19.
The flag that acts as Borrow flag in the instruction, SBB is

a.

direction flag

b.

carry flag

c.

parity flag

d.

trap flag

Discuss
Answer: (b).carry flag
Q20.
In general, the source operand of an instruction can be

a.

memory location

b.

register

c.

immediate data

d.

all the above

Discuss
Answer: (d).all the above
Page 2 of 9

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