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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.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of 80386 and 80486 Microprocessor. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

80386 and 80486 Microprocessor MCQs | Page 3 of 13

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Q21.
The unit that has a prioritizer to resolve the priority of the various bus requests is

a.

bus sizing unit

b.

data buffer

c.

bus control unit

d.

execution unit

Discuss
Answer: (c).bus control unit
Q22.
The unit that interfaces the internal data bus with the system bus is

a.

bus sizing unit

b.

data buffer

c.

bus control unit

d.

execution unit

Discuss
Answer: (b).data buffer
Q23.
The unit that drives the bus enable and address signals A0-A31 is

a.

bus sizing unit

b.

bus driving unit

c.

address driver

d.

bus driver

Discuss
Answer: (c).address driver
Q24.
Which of the following pin when activated, allows address pipelining?

a.

ADS

b.

NA

c.

AP

d.

None of the mentioned

Discuss
Answer: (b).NA
Q25.
The signal that is used to insert WAIT states in a bus cycle in 80386 is

a.

HOLD

b.

HLDA

c.

READY

d.

PEREQ

Discuss
Answer: (c).READY
Q26.
The signal which indicates to the CPU, to fetch a data word for the coprocessor is

a.

READY

b.

NMI

c.

HLDA

d.

PEREQ

Discuss
Answer: (d).PEREQ
Q27.
The pipeline and dynamic bus sizing units handle

a.

data signals

b.

address signals

c.

control signals

d.

all of the mentioned

Discuss
Answer: (c).control signals
Q28.
The 16-bit registers are available with their extended size of 32 bits, by adding the registers with a prefix of

a.

X

b.

E

c.

32

d.

XX

Discuss
Answer: (b).E
Q29.
In a 32-bit register, ESP, the lower 16-bits of the register can be represented by

a.

LSP

b.

FSP

c.

SP

d.

None of the mentioned

Discuss
Answer: (c).SP
Q30.
Which of the following is a data segment register of 80386?

a.

ES

b.

FS

c.

GS

d.

All of the mentioned

Discuss
Answer: (d).All of the mentioned
Page 3 of 13

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