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-6 section-2

In a daisy chained connection to the CPU, the peripheral whose interrupt request has the highest priority is the one

A) With the largest vector address B) With highest speed of operation C) Electrically nearest to the CPU D) Electrically farthest from the CPU

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Answer & Solution

Answer: Option C

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Pipelining technique is used in microprocessor to improve which of the following parameter?

A) Power dissipation B) Interrupt latency C) Die size D) Maximum clock frequency

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Answer & Solution

Answer: Option D

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The number of hardware interrupts (which require an external signal to interrupt) present in an 8085 microprocessor are

A) 1 B) 4 C) 5 D) 13

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Answer & Solution

Answer: Option C

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A microprocessor perform

A) Low pass filtering B) Logic operation C) Amplification D) None of these

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Answer & Solution

Answer: Option B

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Consider the following instructions executed in 8086.
PUSH AX; AX has 20 Hex in it
PUSH BX; BX has 34 Hex in it
POP AX;
ADD AX, BX;
POP G
The value stored in G would be

A) 20 Hex B) 34 Hex C) 54 Hex D) 68 Hex

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Answer & Solution

Answer: Option A

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When the microprocessor receives an interrupt request, it finishes the instruction it is executing and then jumps to:

A) IR B) ACC C) SP D) ISR

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Answer & Solution

Answer: Option D

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In mode 0, Interrupt on terminal count of 8253, if the gate pin is made low while counter is decrementing, which one of the following operations will follow?

A) Counter stops and cleared to '0' and starts decrementing when gate pin is made high B) Counter stops and thereafter it increments till gate pin = '1' high C) Counter stops, the current contents are held and the decrement operation resume only after gate pin is made high D) Counter stops, the current contents are held for one clock cycle and the decrement operation resume

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Answer & Solution

Answer: Option C

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An 8-bit microcontroller has an external RAM with the memory map from 8000H to 9FFFH. The number of bytes this RAM can store is

A) 8193 B) 8192 C) 8191 D) 8000

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Answer & Solution

Answer: Option B

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For 8086 microprocessor, the jump distance in bytes for short jump range is

A) Forward 255 and Backward 256 B) Forward 127 and Backward 128 C) Forward 31 and Backward 32 D) Forward 15 and Backward 16

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Answer & Solution

Answer: Option B

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The instruction DAA in 8085

A) converts binary to BCD B) converts BCD to binary C) adds contents of accumulator to accumulator D) decrements accumulator

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Answer & Solution

Answer: Option A

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