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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 19 of 19

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Q181.
If the stack flag is set, and condition code bit C1=0, then the stack is

a.

full

b.

overflown

c.

underflown

d.

empty

Discuss
Answer: (c).underflown
Q182.
The bits that affect the result of arithmetic operations like ADD, SUB, MUL, DIV are

a.

condition code bits

b.

rounding control bits

c.

masking bits

d.

precision control bits

Discuss
Answer: (d).precision control bits
Q183.
The precision is decided by the

a.

opcode

b.

extended precision format

c.

opcode or extended precision format

d.

none of the mentioned

Discuss
Answer: (c).opcode or extended precision format
Q184.
If Numeric Processor Write (NPWR) active-low input pin is activated, then it enables a data transfer from

a.

memory to processor

b.

80287 to 80286

c.

80286 to 80287

d.

8086 to 80287

Discuss
Answer: (c).80286 to 80287
Q185.
If Numeric Processor Read (NPRD) active-low input pin is activated, then it enables a data transfer from

a.

memory to processor

b.

80287 to 80286

c.

80286 to 80287

d.

8086 to 80287

Discuss
Answer: (b).80287 to 80286
Q186.
Which of the input line(s) indicate that the CPU is performing an escape operation, and enables 80287 to execute the next instruction?

a.

NPWR (active low) and NPRD (active low)

b.

NPS1 and NPS2 (active low)

c.

NPS1 (active low) and NPS2

d.

CMD0 and CMD1

Discuss
Answer: (c).NPS1 (active low) and NPS2
Q187.
For which pin of 80286 is the active low pin, BUSY of 80287, connected?

a.

ERROR (active low)

b.

BUSY (active low)

c.

HLDA

d.

TEST (active low)

Discuss
Answer: (d).TEST (active low)
Q188.
If Clock Mode (CM) input pin is held low, then the CLK input is divided by

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (b).2
Q189.
Which of the following pin is not involved in the interface of 80287 with 80286?

a.

PEREQ

b.

ERROR#

c.

RESET

d.

CMD0 and CMD1

Discuss
Answer: (c).RESET
Q190.
The PEACK (active low) when activated, the pin that goes into deactivation is

a.

PEREQ

b.

ERROR#

c.

RESET

d.

CMD0 and CMD1

Discuss
Answer: (a).PEREQ
Page 19 of 19

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