Answered: 4- What is meant by interrupt?

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Step 1

On digital computers, an interrupt is the processor's response to an event that requires software focus.

An interrupt state alerts the processor and acts as a demand for the processor to interrupt when permitted the user executes code, such that the activity can be handled in a reasonable time.

Step 2

Interrupts:- Interrupts being signals received by external devices, usually I / O devices, through the CPU. They tell the CPU to end its current operations and run the relevant part of a web browser.

For example:- If you are using a word processor and pressing a key, the program must automatically process the information.

When incidents occur, hardware devices indicate the operating system.
The operating system preempts any running process to manage the case (switches meaning away from file system).
Requires a more flexible method than polling can provide.
Implementation more complex (needs hardware support).

There are three different types of interrupts:-

Hardware Interrupts:- Hardware devices produce them to show they need some attention from the OS. They may have just received any data ( e.g., shortcut keys on the keyboard or data on the ethernet network); or that they have just accomplished a task previously required by the web browser, including such data transmission between both the hard drive and storage.
Software Interrupts:-They are created by software because when the operating system demands a system call to be executed.
Traps:- They are created by the CPU to also indicate that certain errors or conditions emerged for which operating system assist is required.

Interrupts are necessary because they provide better control of the machine for the user. A user may have to wait without interruptions until a given program has a greater priority for the CPU to run. This means the operation will be dealt with immediately by the CPU.