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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-9 section-1

Each section contains 100 MCQs on Microprocessors and Microcontrollers .
81
The method used to transfer data from I/O units to memory by suspending the memory-CPU data transfer for one memory cycle is called
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Answer & Solution
Answer: Option B
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82
Description of LAHF instruction in 8086 processor
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Answer & Solution
Answer: Option D
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83
The RST 5.5 interrupt service routine starts from location
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Answer & Solution
Answer: Option D
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84
Consider the following statements regarding 8051 microcontroller:
1. The size of RAM in 8051 is 128 bytes.
2. RAM locations 00-1FH are assigned to the register banks and stack.
3. RAM location 20-2FH are available as a place to save byte-sized data.
Which of the above statements are correct?
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Answer & Solution
Answer: Option D
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85
The total number of memory accesses involved (inclusive of the op-code fetch) when an 8085 processor executes the instruction LDA 2003 H is
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Answer & Solution
Answer: Option D
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86
What is the activity of the microprocessor 8086/8085 when the signals $$\overline {{\text{S}}{{\text{S}}_0}} ,\,{\text{DT/}}\overline {\text{R}} $$   and $${\text{IO/}}\overline {\text{M}} $$  are 1, 0 and 1 respectively in minimum mode?
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Answer & Solution
Answer: Option B
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87
A reserved area in RAM used for temporary storage of data, return addresses and content of registers during subroutine calls and interrupts is called:
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Answer & Solution
Answer: Option D
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88
The 8085 microprocessor instructions with required number of T states are given below. Which pair is correctly matched?
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Answer & Solution
Answer: Option B
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89
Match List-I correctly with List-II and select your answer using the options given below:
List-I (Request) List-II (Device)
a. Interrupt 1. I/O device
b. Wait 2. DMA controller
c. Hold 3. Memory
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Answer & Solution
Answer: Option A
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90
The frequency of the driving network connected between pins 1 and 2 of a 8086 chip must be
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Answer & Solution
Answer: Option B
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