8051 Interrupts MCQs

Practice 8051 Interrupts MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Microprocessors & Microcontrollers8051 Interrupts

The classic 8051 provides how many standard interrupt sources?

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Correct Answer: B. 5

Explanation: The standard 8051 has five interrupt sources: external 0, Timer 0, external 1, Timer 1 and serial port.

Reference: Standard microprocessors and microcontrollers: 8051 interrupts

Question 2

Microprocessors & Microcontrollers8051 Interrupts

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Correct Answer: A. IE

Explanation: The Interrupt Enable (IE) register contains the global enable bit EA and individual interrupt-enable bits.

Reference: Standard microprocessors and microcontrollers: 8051 interrupts

Question 3

Microprocessors & Microcontrollers8051 Interrupts

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Correct Answer: A. IP

Explanation: The Interrupt Priority (IP) register selects low or high priority for individual interrupt sources.

Reference: Standard microprocessors and microcontrollers: 8051 interrupts