8051 Interrupts Quiz

What is an interrupt in the context of a microcontroller?

• A type of memory storage

• A programming language

• An external or internal event that disturbs the microcontroller

• A hardware component

What is the program associated with an interrupt called?

• Interrupt service routine (ISR)

• Interrupt handler

• Interrupt manager

• Interrupt controller

Which of the following is NOT a method for servicing devices in a microcontroller?

• Polling

• Event-driven programming

• Interrupts

• Interrupt handling

How can interrupts be enabled by bit operation?

• By setting specific bits

• Using the MOV instruction

• By using a loop

• By resetting the microcontroller

What happens if two interrupt sources occur simultaneously?

• The microcontroller ignores the interrupts

• The interrupt with the highest priority gets serviced first

• Both are serviced at the same time

• The one with the lowest priority is serviced first

Which interrupt has the highest default priority?

• Timer interrupt 1

• Serial communication

• External interrupt 0

• Timer interrupt 0

What is the purpose of the IP register?

• To store interrupt service routines

• To set interrupt priorities

• To disable interrupts

• To enable interrupts

Which bit in the IP register corresponds to Timer 0 interrupt priority?

• IP.0

• IP.1

• IP.2

• IP.3

What does the command 'MOV IE, #80H do?

• Disables all interrupts

• Sets interrupt priorities

• Configures the timer

• Enables all interrupts

What is the effect of a high-priority interrupt on a low-priority interrupt?

• The low-priority interrupt is serviced first

• The low-priority interrupt waits until the high-priority interrupt is serviced

• The low-priority interrupt is ignored

• Both interrupts are serviced simultaneously