Difference Between Interrupt and Exception

Exceptions and interrupts are unexpected events which will disrupt the normal flow of execution of instruction(that is currently executing by processor). An exception is an unexpected event from within the processor. Interrupt is an unexpected event from outside the process.

1. What is the difference between an interrupt and trap?
2. What is the difference between interrupt and polling?
3. What is a exception?
4. What are exceptions in OS?
5. What is the purpose of an interrupt?
6. Which Interrupt has the highest priority?
7. What are the pros and cons of interrupts and polling?
8. Which is better polling or interrupt?
9. Are interrupts faster than polling?
10. What happens when there is a delivery exception?
11. Can we make an exception?
12. What happens when exception occurs?

What is the difference between an interrupt and trap?

A trap is a software-generated interrupt. An interrupt can be used to signal the completion of an I/O to obviate the need for device polling. A trap can be used to call operating system routines or to catch arithmetic errors. ... Interrupts are hardware interrupts, while traps are software-invoked interrupts.

What is the difference between interrupt and polling?

Interrupt is a hardware mechanism as CPU has a wire, interrupt-request line which signal that interrupt has occurred. On the other hands, Polling is a protocol that keeps checking the control bits to notify whether a device has something to execute. Interrupt handler handles the interrupts generated by the devices.

What is a exception?

Definition: An exception is an event, which occurs during the execution of a program, that disrupts the normal flow of the program's instructions. When an error occurs within a method, the method creates an object and hands it off to the runtime system. ... This block of code is called an exception handler.

What are exceptions in OS?

Exceptions and interrupts are unexpected events that disrupt the normal flow of instruction execution. An exception is an unexpected event from within the processor. An interrupt is an unexpected event from outside the processor. You are to implement exception and interrupt handling in your multicycle CPU design.

What is the purpose of an interrupt?

Interrupts are important because they give the user better control over the computer. Without interrupts, a user may have to wait for a given application to have a higher priority over the CPU to be ran. This ensures that the CPU will deal with the process immediately.

Which Interrupt has the highest priority?

TRAP is the internal interrupt that has the highest priority among all interrupts except the divide by zero exception.

What are the pros and cons of interrupts and polling?

Polling means you won't know when the data is ready, but you can get it when you are ready. You'll have to tell your program how to wait for the data. Meanwhile, the interrupt triggers instantly when the data is ready, and the interrupt handler can fetch the data before the next instruction completes.

Which is better polling or interrupt?

The first advantage is- the performance of microcontroller is far better in Interrupt method than Polling Method. In polling method, the microcontroller is checking continuously whether the device is ready or not, but the chances of data loss are greater in Polling than Interrupt.

Are interrupts faster than polling?

However, performing storage I/O with ultra-low latency devices using next-generation non-volatile memory, it can be shown that polling for the completion — hence wasting clock cycles during the I/O — delivers higher performance than traditional interrupt-driven I/O. ...

What happens when there is a delivery exception?

An exception occurs when a package is temporarily delayed while in transit. Every effort is made to deliver every package as soon as possible, so an exception does not necessarily denote a late shipment. ... Such a delivery exception may occur because the package was incorrectly addressed, a recipient was unavailable, etc.

Can we make an exception?

Exempt someone or something from a general rule or practice, as in Because it's your birthday, I'll make an exception and let you stay up as late as you want.

What happens when exception occurs?

An exception (short for "exceptional event") is an error or unexpected event that happens while a program is running. When an exception occurs, it interrupts the flow of the program. If the program can handle and process the exception, it may continue running.