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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-4 section-3

Each section contains 100 MCQs on Microprocessors and Microcontrollers .
31
Which one of the following is NOT a vectored interrupt?
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Answer & Solution
Answer: Option B
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32
Consider the following statements regarding programmable interrupt controller 8259A:
1. 8259A is specifically designed for use with the interrupt signals (INTR/INT) of 8085 microprocessor.
2. It can solve eight levels of interrupt priorities in a variety of modes.
3. With additional 8259A devices, the priority scheme can be expanded to 32 levels.
Which of the above statement is/are not correct?
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Answer & Solution
Answer: Option A
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33
Which one of the following addressing modes is used to compute the address of the operand by adding a constant value to the content of a register?
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Answer & Solution
Answer: Option B
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34
For 8085 microprocessor, the instruction RST 6 restarts subroutine at address:
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Answer & Solution
Answer: Option C
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35
In 8085 microprocessor system, the direct addressing instructions is
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Answer & Solution
Answer: Option D
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36
PUSH   a
PUSH   b
PUSH   c
POP   AX
POP   BX
SUB   AX, BX
POP   BX
ADD   AX, BX
The expression computed by the above program and stored in AX is
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Answer & Solution
Answer: Option C
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37
In IC 8085 Microprocessor TRAP interrupt ISR is at which memory address?
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Answer & Solution
Answer: Option C
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38
The output data lines of microprocessor and memories are usually tristated, because:
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Answer & Solution
Answer: Option A
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