Why are interrupts more efficient?

Advantages of Interrupt over Polling. 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.

Why are interrupts important in OS?

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.

Why are interrupts more efficient than polling?

Whereas, in polling, CPU steadily checks whether the device needs attention. 2. An interrupt is not a protocol, its a hardware mechanism. Whereas it isn’t a hardware mechanism, its a protocol.

How the priority is assigned to the interrupt signals?

This way of deciding the interrupt priority consists of serial connection of all the devices which generates an interrupt signal. The device with the highest priority is placed at the first position followed by lower priority devices and the device which has lowest priority among all is placed at the last in the chain.

What advantages does interrupt I O have over device polling?

In interrupt driven data transfer, whenever I/O device is ready for the data transfer, it will interrupt the CPU. In the ISR, the CPU will perform the data transfer. This method is better than polling because here the CPU does not have to waste time in checking the status of the I/O device.

When programmed I O is more efficient than interrupt driven I O?

These are three possible modes: Programmed I/O….Difference between Programmed and Interrupt Initiated I/O :

Programmed I/O	Interrupt Initiated I/O
Its module is treated as a slow module.	Its module is faster than programmed I/O module.
It is quite easy to program and understand.	It can be tricky and complicated to understand if one uses low level language.