1.2.2. Types of Operating Systems

Multi-tasking definition and where these OS are found

This is an operating system that enables a single processor to execute multiple tasks (processes) "simultaneously" by rapidly switching between them.

Found in modern processors/cores in computers, smartphones, and tablets

How multi-user OS work

Scheduling is used to allocate each active program a small time slice in which they are to be processed. These active programs will run in quick rotation, giving the illusion that they are operating simultaneously.

Where these processors have multiple cores, MIMD parallel processing is used to process and execute instructions.

Why is multitasking important? [3]

It enables users to switch between applications without having to wait for one to finish before starting another.

This maximises processing power by preventing idle time as when one process is waiting for input, another program can be processed

The cost of multitasking OS is

inexpensive

Multi-user OS and where they are used

This is an OS that allows multiple users to use the same system simultaneously without affecting the computer’s performance