Answer Posted / roy

An interrupt is an asynchronous signal from hardware
indicating the need for attention or a synchronous event in
software indicating the need for a change in execution. A
hardware interrupt causes the processor to save its state
of execution via a context switch, and begin execution of
an interrupt handler. Software interrupts are usually
implemented as instructions in the instruction set, which
cause a context switch to an interrupt handler similar to a
hardware interrupt. Interrupts are a commonly used
technique for computer multitasking, especially in real-
time computing. Such a system is said to be interrupt-
driven. An act of interrupting is referred to as an
interrupt request ("IRQ").

Exceptions are conditions that changes the normal flow of
execution. In the context of normal flow, exceptions can be
categorised as error situations. Depending upon the program
exception conditions may need to be handles in the
software.

In a way Interrupts and Exceptions can be related to each
other, in the fact that certain exception handling may
result in generating interrupts. In otherwords certain
interrupts can be manifestation of certain error/exceptions.

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