Question

What is an 'Interrupt' in the context of Operating Systems?

Q: Answer-What is an 'Interrupt' in the context of Operating Systems?

Hardware interrupts are generated by IO devices keyboard press, network packet arrival, disk read complete allow CPU to do other work while waiting for IO asynchronous IO. Software interrupts trapsexceptions are generated by programs for system calls or errors divide by zero, page fault. The OS maintains an Interrupt Vector Table IVT mapping interrupt numbers to their handler routines. Interrupts are fundamental to efficient CPU utilization and without them, the CPU would waste cycles polling devices.

A An error message displayed when a program crashes and all processes currently executing are killed

B A signal sent to the CPU by hardware or software indicating an event that requires immediate attention

C A command used to forcefully terminate a running process since it is consuming a lot of system resources

D A priority flag assigned to a process by the scheduler to let the CPU know about the priority of the process

E A type of memory protection mechanism preventing buffer overflows

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