Answer :
A timer exception occurs and triggers the appropriate interrupt handler.
What is exception?
Exceptions are runtime errors that disrupt the normal flow of instructions in a programme.
The method in which an error occurs generates an exception object, which is then passed to the runtime system. This is referred to as throwing an exception. The object contains information about the error, such as its type and location.
An exception handler is the code that runs when an exception occurs. The runtime method searches the call stack for an appropriate method containing the code for handling the exception. After receiving the exception, the runtime system attempts to find an appropriate way to handle it.
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