Understanding Interrupts and IDT

What is the primary function of the Interrupt Dispatch Table (IDT)?

• To execute system calls

• To store the device descriptions and interrupt routines

• To manage process scheduling

• To handle user-mode interrupts

Which of the following is an example of an exception interrupt?

• Printer out of paper

• Division by zero

• Process requesting a resource

• Device not present

What is the role of the kernel when an interrupt is received?

• To suspend the interrupting task

• To consult the interrupt dispatch table and invoke the appropriate interrupt routine

• To terminate the process

• To reset the CPU

What happens to the process state when an interrupt occurs?

• It is permanently saved

• It is saved on the kernel stack and restored after the interrupt is serviced

• It is erased

• It is transferred to user mode

Which type of interrupt occurs when a device is not present?

• Device interrupt

• Exception

• Trap/software interrupt

• Clock interrupt

Which interrupt is prioritized using the Interrupt Priority Level (IPL)?

• User interrupts

• Timer interrupts

• Hardware interrupts

• System call interrupts

What does the kernel do when the interrupt priority level (IPL) is lower than the current task?

• The current task is suspended

• The interrupt is ignored

• The interrupt is processed immediately

• The current task continues without interruption

What is the maximum interrupt priority level (IPL) mentioned in the system?

• 31

• 24

• 20

• 10

Which of the following is an example of a trap/software interrupt?

• Stack fault

• Power fail interrupt

• Clock interrupt

• I/O devices interrupt

What happens when a process’s interrupt priority level is greater than the current task’s IPL?

• The current task is suspended

• The process with a higher IPL is ignored

• The process is immediately executed

• The system crashes