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Welcome to the 80286 80287 Microprocessor MCQs Page

Dive deep into the fascinating world of 80286 80287 Microprocessor with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of 80286 80287 Microprocessor, a crucial aspect of Microprocessor. In this section, you will encounter a diverse range of MCQs that cover various aspects of 80286 80287 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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80286 80287 Microprocessor MCQs | Page 6 of 19

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Q51.
The 80286 CPU acts just like that of 8086 when operated in

a.

real addressing mode

b.

protected virtual address mode

c.

real and protected virtual address modes

d.

none of the mentioned

Discuss
Answer: (a).real addressing mode
Q52.
In real addressing mode, the 80286 addresses a physical memory of

a.

16 MB

b.

8 MB

c.

2 MB

d.

1 MB

Discuss
Answer: (d).1 MB
Q53.
In real addressing mode, the 80286 operates at a speed

a.

faster than that of 8086

b.

half of that of 8086

c.

slower than that of 8086

d.

same as that of 8086

Discuss
Answer: (a).faster than that of 8086
Q54.
In physical memory, if the segment size limit is exceeded by the instruction or data then

a.

instruction is not executed

b.

exception is generated

c.

saves to next segment automatically

d.

none of the mentioned

Discuss
Answer: (b).exception is generated
Q55.
The 80286 reserves fixed area of physical memory for

a.

system initialization

b.

interrupt vector table

c.

system initialization and interrupt vector table

d.

none of the mentioned

Discuss
Answer: (c).system initialization and interrupt vector table
Q56.
In the real mode, the memory that is reserved for interrupt vector table is

a.

first 2 KB of memory

b.

first 1 KB of memory

c.

last 2 KB of memory

d.

last 1 KB of memory

Discuss
Answer: (b).first 1 KB of memory
Q57.
In the real mode, the memory that is reserved for system initialization is

a.

from 004FFH to 0FFFFH

b.

from 004FFH to 05FFFH

c.

from FFFF0H to FFFFFH

d.

from FFF00H to FFFFFH

Discuss
Answer: (c).from FFFF0H to FFFFFH
Q58.
When 80286 is reset, it always starts its execution in

a.

protected virtual addressing mode

b.

real addressing mode

c.

either real or protected virtual address modes

d.

none of the mentioned

Discuss
Answer: (b).real addressing mode
Q59.
The 80286 in real addressing mode performs

a.

initialization of IP

b.

enables interrupts

c.

sets up descriptor table

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q60.
In real address mode, while addressing the physical memory, the 80286 uses the signal

a.

HLDA

b.

BHE (active low)

c.

CAP

d.

HOLD

Discuss
Answer: (b).BHE (active low)
Page 6 of 19

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