The Information Processing Cycle

Question 1

Input

Answer 1

The computer receives instructions

Input devices only allow for input of data to a computer

Question 2

Output

Answer 2

Displayw results after processing

Question 3

Processing

Answer 3

The computer works on the data

The part of the computer tha does all the processing is the CPU (Central Processing Unit)

Question 4

Storage

Answer 4

Keep permanent record of our work

Can provide input(hard drive or flash drive

Question 5

Communications

Answer 5

Computers linked to other computers can communicate

Question 6

Why do computers need data

Answer 6

Because without it ther is nothing to process

Question 7

Keyboard shortcuts

Answer 7

F1 - opens up a help screen for the program you are working in

Esc- let’s you get out of options or cancel choices

Print screen key - tales a photo of everything on the screen and places it on clipboard

Question 8

What do we mean by plug and play

Answer 8

A series of technologies where the operating system automatically detects and configures a device that has been plugged into the computer so that the device can be used immediately

Question 9

Advantages of wireless devices

Answer 9

Less clutter as there are no cables

You have a wider range of movement

Question 10

Disadvantage or limitations of wireless devices

Answer 10

They require batteries

They are slightly more expensive than wired devices

Can easily be removed so easily stolen

There can sometimes be inference with the wireless signal, causing the device to stop working temporarily

Question 11

Hard copy

Answer 11

Print outs on paper

Question 12

Soft copy

Answer 12

The visual output on our computer screens

Question 13

How is a monitor measured

Answer 13

The size is measured diagonally in inches from one corner to the other

Question 14

Resolution

Answer 14

Refers to the number of pixels used to form the image

It is measured horizontally and vertically in pixels

Question 15

Storage medium

Answer 15

Actual physical material or objects on which we store the data and programs

Question 16

Storage devices

Answer 16

The computer hardware that read from and write to storage media

Question 17

Storage capacities

Answer 17

Kilobyte (KB) 1024 bytes - normal word document

Megabyte (MB) 1024 KB - programs, videos, music

Gigabyte (GB) 1024 MB - browse web, use social networks and check email for up to around 40 minutes per day. Ideal for lighter users

Terabyte (TB) 1024 GB - external hard drives

Question 18

Health concerns

Answer 18

Repetitive Strain Injury (RSI) - name given to injuries resulting from fast, repetitive work

Back pain
Headache
Carpal tunnel syndrome

Question 19

Prevent RSI

Answer 19

Built-in wrist rests
Curved keyboards

Other health issues
Eyesight problems
Stiffness of the back
General tiredness

Question 20

Health tips for using computers

Answer 20

Use ergonomically designed equipment

Sit correctly

Ensure that lighting and ventilation are adequate

Occasionally turn your eyes away from the monitor

Take regular breaks

Question 21

Ergonomics

Answer 21

The study and design of the workplace for the comfort and safety of people in work environments

Question 22

Ways to practice green computing

Answer 22

Try to conserve power- switch devices off when not being used

Do not waste paper

Try to upgrade or donate old hardware

Buy energy efficient notebook computers instead of desktop computers

Check if you can refill and reuse ink and toner cartridges

Question 23

What should you consider when buying a storage device

Answer 23

Storage considerations - storage capacity refers to how much disk space one or more storage devices provides

Read and write speeds - a measure of performance on a storage device

Reliability - the ability of the computer system to perform it’s required functions for a given period of time

Function - what do you want to do on computer

Question 24

Examples of internal storage devices

Answer 24

Internal hard drive (HDD) - hard drive that resides inside the computer

Question 25

External hard drive

Answer 25

Device which is plugged into your machine to give almost immediate storage space with the need yo open your computer’s internal storage to make upgrades

SD ( Secure Digital Card) -removable memory card

Question 26

Solid state Drive (ssd)

Answer 26

Mass storage device similar to a Hard disk drive (HDD)

Do not any have moving parts like HDDs

Instead of storing data on magnetic platters, SSD’s store data using flash memory

Access data faster than HDDs

USB flash drives - used for storage, data and backup and transferring of computer files

Question 27

How do you sit behind your computer

Answer 27

Your upper legs should be flat against the bottom of the chair

Your lower legs should form a 90 degree angle at your knees

Your feet should be at a flat 90 degree angle to your lower legs

Your back should be at between 100 and 135 degrees in relation to your legs

Your arms should be tucked near your sides

Your shoulders and neck should be relaxed

Your eyes should be able to view the screen comfortably without having to stretch, crane, or strain your neck or eyes

Question 28

What is green computing

Answer 28

Environmentally responsible and eco- friendly use of computers and their resources

Question 29

What is authentication

Answer 29

Process of verifying the identity of a person or device

Question 30

Example of authentication

Answer 30

Entering a username and password when you log in to a website

Question 31

Why is authentication important

Answer 31

Authentication is crucial because it ensures that only authorized users can access protected resources like computer systems, networks, and websites, helping organizations keep their networks secure.