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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 3 of 13

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Q21.
The unit that has a prioritizer to resolve the priority of the various bus requests is
Discuss
Answer: (c).bus control unit
Q22.
The unit that interfaces the internal data bus with the system bus is
Discuss
Answer: (b).data buffer
Q23.
The unit that drives the bus enable and address signals A0-A31 is
Discuss
Answer: (c).address driver
Q24.
Which of the following pin when activated, allows address pipelining?
Discuss
Answer: (b).NA
Q25.
The signal that is used to insert WAIT states in a bus cycle in 80386 is
Discuss
Answer: (c).READY
Q26.
The signal which indicates to the CPU, to fetch a data word for the coprocessor is
Discuss
Answer: (d).PEREQ
Q27.
The pipeline and dynamic bus sizing units handle
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
Discuss
Answer: (b).E
Q29.
In a 32-bit register, ESP, the lower 16-bits of the register can be represented by
Discuss
Answer: (c).SP
Q30.
Which of the following is a data segment register of 80386?
Discuss
Answer: (d).All of the mentioned

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