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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 3 of 9

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Q21.
In general, the destination operand of an instructon can be

a.

memory location

b.

register

c.

immediate data

d.

memory location and register

Discuss
Answer: (d).memory location and register
Q22.
The instruction, CMP to compare source and destination operands it performs

a.

addition

b.

subtraction

c.

division

d.

multiplication

Discuss
Answer: (b).subtraction
Q23.
During comparison operation, the result of comparing or subtraction is stored in

a.

memory

b.

registers

c.

stack

d.

no where

Discuss
Answer: (d).no where
Q24.
The instruction that converts the result in an unpacked decimal digits is

a.

AAA

b.

AAS

c.

AAM

d.

All of the mentioned

Discuss
Answer: (d).All of the mentioned
Q25.
If MN/MX is low the 8086 operates in __________ mode.

a.

Minimum

b.

Maximum

c.

Both a and b

d.

Medium

Discuss
Answer: (b).Maximum
Q26.
A _____ Instruction at the end of interrupt service program takes the execution back to the interrupted
program.

a.

forward

b.

return

c.

data

d.

line

Discuss
Answer: (b).return
Q27.
Which family was the sixth member of 8086 family of microprocessors?

a.

8086

b.

8085

c.

80396 DX

d.

80486 SX

Discuss
Answer: (c).80396 DX
Q28.
ALE stands for ___________.

a.

address latch enable

b.

address level enable

c.

address leak enable

d.

address leak extension

Discuss
Answer: (a).address latch enable
Q29.
8086 microprocessor is interfaced to 8253 a programmable interval timer. The maximum number by which the clock frequency on one of the timers is divided by ________________.

a.

2^16

b.

2^8

c.

2^10

d.

2^20

Discuss
Answer: (a).2^16
Q30.
8086 is interfaced to two 8259s (Programmable interrupt controllers). If 8259s are in master slave
configuration the number of interrupts available to the 8086 microprocessor is _____________.

a.

8

b.

16

c.

15

d.

64

Discuss
Answer: (d).64
Page 3 of 9

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