Interrupt Cycle of 8086/8088 MCQ’s

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This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Interrupt Cycle of 8086/8088″.

1. If the interrupt is generated by the execution of an interrupt instruction then it is
a) internal interrupt
b) external interrupt
c) interrupt-in-interrupt
d) none of the mentioned

2. Example of an external interrupt is
a) divide by zero interrupt
b) keyboard interrupt
c) overflow interrupt
d) type2 interrupt

3. If an interrupt is generated from outside the processor then it is an
a) internal interrupt
b) external interrupt
c) interrupt
d) none of the mentioned

4. Example of an internal interrupt is
a) divide by zero interrupt
b) overflow interrupt
c) interrupt due to INT
d) all of the mentioned

5. The type of the interrupt may be passed to the interrupt structure of CPU from
a) interrupt service routine
b) stack
c) interrupt controller
d) none of the mentioned

6. After every response to the single step interrupt the flag that is cleared is
a) IF (Interrupt Flag)
b) TF (Trap Flag)
c) OF (Overflow Flag)
d) None of the mentioned

7. The interrupt request that is independent of IF flag is
a) NMI
b) TRAP
c) Divide by zero
d) All of the mentioned

8. During the execution of an interrupt, the data pushed into the stack is the content of
a) IP
b) CS
c) PSW
d) All of the mentioned

9. At the end of ISR, the instruction should be
a) END
b) ENDS
c) IRET
d) INTR

10. When the CPU executes IRET,
a) contents of IP and CS are retrieved
b) the control transfers from ISR to main program
c) clears the trap flag
d) clears the interrupt flag

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