MPU & MCU Quiz 3 Interruptions

What is the purpose of an interrupt in a microprocessor system?

• To complete the execution of the current program faster

• To stop the current program permanently

• To suspend the current program and execute a different one

• To increase the memory available for processing

Which of the following is NOT a disadvantage of Polled I/O?

• Not fast enough

• Wastes microprocessor time

• Requires dedicated hardware

• Inefficient for multiple devices

What instruction does the 8086 microprocessor use to return from an interrupt service routine?

• RET

• JMP

• CALL

• IRET

What type of interrupt in the 8086 microprocessor cannot be disabled by software?

• NMI (Non-Maskable Interrupt)

• INTR (Interrupt Request)

• INT

• RESET

What happens when two interrupts occur at the same time in an 8086 system?

• Both interrupts are ignored

• Lower priority interrupt is serviced first

• Higher priority interrupt is serviced first

• The system crashes