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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 11 of 19

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Q101.
When a JUMP instruction references a Task State Segment(TSS) descriptor, then DPL must be

a.

equally privileged as CPL

b.

greater or equally privileged than CPL

c.

less or equally privileged than CPL

d.

less privileged than CPL

Discuss
Answer: (c).less or equally privileged than CPL
Q102.
The data segment access refers to

a.

loading DS

b.

loading ES

c.

loading SS

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q103.
An exception is generated when

a.

privilege test is negative

b.

an improper segment is referenced

c.

referenced segment is not present in physical memory

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q104.
The mechanism to provide protection, that is accomplished with the help of read/write privileges is

a.

restricted use of segments

b.

restricted accesses to segments

c.

privileged instructions

d.

privileged operations

Discuss
Answer: (a).restricted use of segments
Q105.
The Local descriptor table (LDT) and Global descriptor table (GDT) are present in

a.

privileged instruction check

b.

operation reference check

c.

segment load check

d.

none of the mentioned

Discuss
Answer: (c).segment load check
Q106.
The mechanism that is accomplished using descriptor usages limitations and rules of privilege check is

a.

privileged instruction check

b.

operation reference check

c.

segment load check

d.

none of the mentioned

Discuss
Answer: (b).operation reference check
Q107.
The mechanism that is executed at certain privilege levels, determined by CPL (Current Privilege Level) and I/O privilege level (IOPL) is

a.

restricted use of segments

b.

restricted accesses to segments

c.

privileged instructions or operations

d.

none of the mentioned

Discuss
Answer: (c).privileged instructions or operations
Q108.
If CPL is not of the required privilege level, then the instructions that get affected is

a.

IRET

b.

POPF

c.

IRET and POPF

d.

None of the mentioned

Discuss
Answer: (c).IRET and POPF
Q109.
If CPL is greater than zero, then the instruction that remains unaffected is

a.

IRET

b.

POPF

c.

IF

d.

IRET and POPF

Discuss
Answer: (c).IF
Q110.
The condition, “CPL not equals to zero” satisfies when executing the instruction

a.

LIDT

b.

LGDT

c.

LTR

d.

All of the mentioned

Discuss
Answer: (d).All of the mentioned
Page 11 of 19

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