Microprocessors And Microcontrollers MCQ Questions & Answers

Microprocessors And Microcontrollers MCQ Questions & Answers | ECE

Learn Microprocessors And Microcontrollers MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Microprocessors And Microcontrollers MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-5 section-2

Which one of the following is used as the interface chip for data transmission between 8086 and a 16-bit ADC?

A) 8259 B) 8255 C) 8253 D) 8251

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Answer & Solution

Answer: Option B

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Which of the following is a peripheral device

A) 8085 B) 8051 C) 8255 D) None of these

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Answer: Option C

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The principle of locality of reference justifies the use of

A) Interrupts B) DMA C) Virtual memory D) Cache memory

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Answer & Solution

Answer: Option D

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A 'DMA' transfer implies

A) Direct transfer of data between memory and accumulator B) Direct transfer of data between memory and I/O devices without the use of µP C) Transfer of data exclusively within µP registers D) A fast transfer of data between µP registers

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Answer & Solution

Answer: Option B

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Which of the following statements with reference to a generic microprocessor is correct?

A) Instruction cycle time period is exactly equal to machine cycle time period B) Instruction cycle time period is shorter than machine cycle time period C) Machine cycle time period shorter than instruction cycle time period D) Instruction cycle time period is exactly half of machine cycle time period

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Answer & Solution

Answer: Option C

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How does 80386 change operation from real mode to protected mode?

A) By resetting MSB of CR1 contents B) By setting MSB of CR0 contents C) By setting MSB of CR1 contents D) By setting MSB of CR2 contents

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Answer & Solution

Answer: Option B

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In 8085 RRC stands for:

A) Rotate accumulator right B) Rotate accumulator right through carry C) Rotate right carry D) Rotate right carry through accumulator

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Answer & Solution

Answer: Option A

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DMA Module can communicate with CPU through:

A) Interrupt B) Cycle stealing C) Branch instruction D) None of these

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Answer: Option B

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How many different locations can be selected by using 16 address lines

A) 1600 B) 3200 C) 65536 D) 67200

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Answer: Option C

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To have the multiprocessing capabilities of 8086 microprocessor, the pin connected to the ground is

A) $$\overline {{\text{DEN}}} $$ B) ALE C) INTR D) $${\text{MN/}}\overline {{\text{MX}}} $$

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Answer & Solution

Answer: Option D

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