Functions of an Operating System

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An operating system is software that manages the operations on a computer.

Primary functions of an Operating system

• Memory management
• Interrupt service routines
• Processor scheduling
• Backing store management
• Management of all inputs and outputs

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Memory management

Memory management in an operating system allows for memory to be allocated efficiently

Interrupts

An interrupt is a signal from software or hardware that can trigger a function.

Processor scheduling

In order for computers to run multiple tasks at once there needs to be scheduling. Scheduling allows for the CPU to allocate processing time to each process.

Round robin

In a round robin system process are on a first in first out basis. Each process takes its turn.

First come first serve

In a first come first serve, jobs are processed in the order that that are executed. There is no priority in place.

Shortest job first

The smallest processes are ran first before running larger jobs.