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Welcome to the 80386 and 80486 Microprocessor MCQs Page

Dive deep into the fascinating world of 80386 and 80486 Microprocessor with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of 80386 and 80486 Microprocessor, a crucial aspect of Microprocessor. In this section, you will encounter a diverse range of MCQs that cover various aspects of 80386 and 80486 Microprocessor, 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 80386 and 80486 Microprocessor. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Microprocessor.

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80386 and 80486 Microprocessor MCQs | Page 12 of 13

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Q111.
In case of BT instruction, if the bit position in the destination operand specified by the source operand, is ‘1’, then

a.

zero flag is reset

b.

carry flag is set

c.

VM flag is set

d.

RF flag is reset

Discuss
Answer: (b).carry flag is set
Q112.
Which of the following is not a conditional set byte instruction?

a.

SETNP

b.

SETO

c.

SETNAE

d.

SHRD

Discuss
Answer: (d).SHRD
Q113.
The instruction that shifts the specified number of bits in the instruction, from the upper side of the source operand into the lower side of the destination operand is

a.

SHRD

b.

SHLD

c.

SETNS

d.

None of the mentioned

Discuss
Answer: (b).SHLD
Q114.
The instruction that shifts 8 LSB bits of ECX into the MSB positions of EAX, one by one starting from LSB of ECX is

a.

SHLD ECX,EAX,8

b.

SHLD EAX,ECX,8

c.

SHRD ECX,EAX,8

d.

SHRD EAX,ECX,8

Discuss
Answer: (d).SHRD EAX,ECX,8
Q115.
The first processor with an inbuilt floating point unit is

a.

80386

b.

80486

c.

80286

d.

8086

Discuss
Answer: (b).80486
Q116.
Which of the following signal is handled by bus control and request sequencer?

a.

ADS#

b.

PWT

c.

RDY#

d.

All of the mentioned

Discuss
Answer: (d).All of the mentioned
Q117.
The unit that subjects the processor operation to boundary scan tests is

a.

parity generation and control unit

b.

prefetcher unit

c.

boundary scan and control unit

d.

segmentation unit

Discuss
Answer: (c).boundary scan and control unit
Q118.
The management of the virtual memory of the system and adequate protection to data or codes in the physical memory is provided by

a.

segmentation unit

b.

paging unit

c.

attribute PLA

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q119.
The flag that is added to 80486 in additional to the flags similar to 80386 is

a.

alignment check flag

b.

parity check flag

c.

conditional flag

d.

all of the mentioned

Discuss
Answer: (a).alignment check flag
Q120.
The major limitation of 80386-387 system is

a.

low speed

b.

80386 sends data using an I/O handshake technique

c.

80386 returns to real mode by reset operation

d.

none of the mentioned

Discuss
Answer: (b).80386 sends data using an I/O handshake technique
Page 12 of 13

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