Microprocessors And Microcontrollers MCQ Questions & Answers

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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-4 section-2

Each section contains 100 MCQs on Microprocessors and Microcontrollers .

Normally PUT instruction is programmed in which part of the logic unit in a PLC program?

A) Input B) Output C) Either input or output D) None of these

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully?

A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

In a 8085 microprocessor, the shift registers which store the result of an addition and the overflow bit are, respectively

A) B and F B) A and F C) H and F D) A and C

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Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

The three basic sections of microprocessor are:

A) Operand, register, ALU B) Control and timing, register, ALU C) Control and timing, register memory D) ALU, memory, I/O

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

The action performed by the following instruction of 8086.
MOV [1234H], AX

A) Move contents of memory location 1234 H to register AX B) Move the contents of register AX to memory offset 1234 H C) Add contents at 1234H to register AX D) Add contents at 1234 H and AX and store the result in 1234 H

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

What is the maximum number of I/O devices can be interfaced with 8085 using I/O mapping of I/O device technique?

A) 8 B) 16 C) 128 D) 256

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Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

Which one of the following is not correct?

A) 8051 provides 6 interrupt sources B) 8051 microcontroller uses memory mapped I/O through special function registers C) Microcontrollers are generally optimized for specific applications D) 8051 microcontroller has two 16-bit Timer/Counter registers

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

An 8085 assembly language program is given below. Assume that the carry flag is initially unset. The content of the accumulator after the execution of the program is
Microprocessors and Microcontrollers mcq question image

Microprocessors and Microcontrollers mcq question image

A) 8C H B) 64 H C) 23 H D) 15 H

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

Intel 8080 microprocessor has an instruction set of 91 instruction. The op-code to implement this instruction set should be minimum

A) 91 bit long B) 8 bit long C) 7 bit long D) 5 bit long

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

When the 8085 receives an interrupt on its INTR pin:

A) the program is directly transferred to a fixed call location B) 8085 waits till an interrupt acknowledgement is received and transfers program to a fixed call location C) the call location is determined by an external device D) the program is transferred to a call location indicated by HL register pair

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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Microprocessors And Microcontrollers MCQ Questions & Answers | ECE