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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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80386 and 80486 Microprocessor MCQs | Page 4 of 13

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Q31.
The register width used by the 32-bit addressing modes is
Discuss
Answer: (d).all of the mentioned
Q32.
The flag that is additional in flag register of 80386, compared to that of 80286 is
Discuss
Answer: (c).VM and RF flag
Q33.
The VM (virtual mode) flag is to be set, only when 80386 is in
Discuss
Answer: (b).protected mode
Discuss
Answer: (c).IRET instruction or task switch operation
Q35.
During the instruction cycle of 80386, any debug fault can be ignored if
Discuss
Answer: (d).RF is set
Q36.
The RF is not automatically reset after the execution of
Discuss
Answer: (c).IRET and POPF
Q37.
The segment descriptor register is used to store
Discuss
Answer: (d).all of the mentioned
Q38.
The 32-bit control register, that is used to hold global machine status, independent of the executed task is
Discuss
Answer: (d).All of the mentioned
Discuss
Answer: (d).All of the mentioned
Q40.
The registers that are together, known as system address registers are
Discuss
Answer: (a).GDTR and IDTR

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