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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 7 of 9

Q61.
The instruction in which adjustment is made before performing the operation is
Discuss
Answer: (d).AAD
Discuss
Answer: (c).decimal adjust accumulator
Q63.
The instruction that is used to convert the result of the addition of two packed BCD numbers to a valid BCD number is
Discuss
Answer: (a).DAA
Q64.
The ROR instruction rotates the contents of the destination operand to
Discuss
Answer: (b).right
Q65.
The mnemonic that is placed before the arithmetic operation is performed is
Discuss
Answer: (d).AAD
Q66.
The Carry flag is undefined after performing the operation
Discuss
Answer: (d).AAD
Q67.
The instruction that performs logical AND operation and the result of the operation is not available is
Discuss
Answer: (c).TEST
Discuss
Answer: (a).carry flag is pushed into LSB and MSB is pushed into the carry flag
Q69.
The instruction that is used as prefix to an instruction to execute it repeatedly until the CX register becomes zero is
Discuss
Answer: (b).REP
Q70.
Match the following:

A) MOvSB/SW 1) loads AL/AX register by content of a string

B) CMPS 2) moves a string of bytes stored in source to destination

C) SCAS 3) compares two strings of bytes or words whose length is stored in CX register

D) LODS 4) scans a string of bytes or words
Discuss
Answer: (d).A-2,B-3,C-4,D-1
Page 7 of 9

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