1.5-operating systems

Question 1

What is user interface?

Answer 1

A user interface allows users to interact

with hardware and software.

Question 2

What is memory management?

Answer 2

The OS manages RAM and ROM and secondary memorys.
It moves data between RAM and secondary storage and vice versa.
It checks which memory locations are free.
It knows exactly what is stored in every location.
It checks in advance if there is enough storage to load a process.
It constantly updates the status of memory to show whether it is free or being used.

Question 3

How does the OS multitask?

Answer 3

Multitasking allows the computer to run several
programs seemingly at the same time.
Several programs can be held in RAM.
Only one process can be running at one time.
The OS controls which program is currently being
executed.
It swaps between tasks so quickly that the user
cannot notice it.
The order in which the tasks are undertaken is
known as scheduling.