Systems Software

Question 1

What does the user interface allow

Answer 1

The user to interact with the hardware

Question 2

Name the four types of user interface

Answer 2

Command line interface
Graphical user interface
Natural language interface
Menu driven interface

Question 3

What are the features of a command line interface

Answer 3

Difficult to use but powerful and requires less processing power

Question 4

What are the features of a graphical user interface

Answer 4

Uses windows, icons, menus and pointers
It is easy to use and intuitive

Question 5

What are the features of the natural language interface

Answer 5

User voice to interact
Very intuitive but limited

Question 6

What are the features of the menu driven interface

Answer 6

A series of limited menus are shown to the user

Question 7

What is memory management

Answer 7

organising a computers memory so that is can run multiple programs at the same time and it can multi task

Question 8

What is time slicing

Answer 8

When each program is given a slice of time to run in the cpu making it feel like they are running at the same time

Question 9

How does the os maximise the use of space in the memory

Answer 9

It splits the data efficiently in memory by fragmenting them

Question 10

What is fragmentation

Answer 10

Splitting a program or files into pages so that it can be placed in free spaces in memory/secondary storage

Question 11

What is a peripheral

Answer 11

A piece of hardware attached to the device

Question 12

Why does the os use device driver software

Answer 12

To communicate with internal hardware or peripherals connected to the computer

Question 13

Why does the os use the device driver

Answer 13

To translate the instructions so that the hardware understands the task

Question 14

What is user management

Answer 14

managing a users digital identity (access to resources and account information)

Question 15

What users does the os have

Answer 15

Multi user and single user

Question 16

What is a multi user os

Answer 16

It allows multiple accounts on one device and each account may have different access levels (they can see different files)

Question 17

What is the features of a multi user os

Answer 17

Each account might have different access levels(see different files), have their own files, programs, settings and desktop and other users cannot see the other users files, programs and settings

Question 18

What is file management

Answer 18

The organisation of the data into a manageable hierarchal structure by the OS

Question 19

What does file management allow

Answer 19

The user to create, rename, move and delete folders

Question 20

What does the os do with the hard drive

Answer 20

writes and reads data to the hard drive

Question 21

What is stored on the hard drive

Answer 21

Data

Question 22

What does file extension do

Answer 22

Lets the os know what applications they need to use to open the file

Question 23

What are examples of file extensions

Answer 23

JPEG - image
MPEG - videos
DOCX - document
Xls - spreadsheet

Question 24

What does the utility software do

Answer 24

Maintains the computer and useful utilities are installed with the operating system

Question 25

What does extra utility software do

Answer 25

Perform additional tasks

Question 26

What does encryption software do

Answer 26

Scrambles data to stop third parties from being able to read and understand it so if data is intercepted when being sent across a network the hacker won’t be able to understand it

Question 27

What is needed to decrypt data

Answer 27

A private key

Question 28

What is needed to encrypt data

Answer 28

A public key

Question 29

Name the two types of keys and what they do

Answer 29

Public key - encrypts data
Private key - decrypts data

Question 30

Where are files stored

Answer 30

On the hard disk in available space

Question 31

Why do small gaps in storage appear

Answer 31

Files are created, deleted and moved

Question 32

Why does the os fragment files

Answer 32

To make them fit in the small gaps

Question 33

What is the problem with fragmented files

Answer 33

It makes reading and writing slower

Question 34

What is defragmentation

Answer 34

When the os reorganises the files and putes them back together creating lots of free space together rather than separated

Question 35

What does defragmenting a SSD do

Answer 35

It reduces its lifespan because it has no moving parts so if it’s fragmented it doesn’t take longer time to read and write to

Question 36

What is data compression

Answer 36

When the file is compressed to reduce the size of a file

Question 37

What does data compression allow

Answer 37

More files to be stored and for them to be downloaded faster

Question 38

What is lossy compression

Answer 38

Permanently deletes data that won’t be noticed but the file cannot be restored to its original quality

Question 39

What is lossy compression used on

Answer 39

Images (jpeg)

Question 40

Advantages of lossy compression

Answer 40

It significantly reduces the file size

Question 41

Disadvantages of lossy compression

Answer 41

It can be worse quality

Question 42

What is lossless compression

Answer 42

Uses an algorithm to compress a file and the file can be restored to its original quality when uncompressed

Question 43

What is lossless compression used for

Answer 43

.zip (zipped files)

Question 44

Advantages of lossless compression

Answer 44

Better quality

Question 45

Disadvantages of lossless compression

Answer 45

Doesn’t reduce the file size as much