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Year 8 Computing > CT term 1 > Flashcards

CT term 1 Flashcards

1
Q

Examples of output devices

A

monitor

printer

speakers

headphones

projector

touch screen

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2
Q

postersize

A

To print or display using only a handful of different tones. Adjust; a slightly crude image

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3
Q

bit

A

A contraction of “Binary Digit”. A bit is the single unit of information in a computer, typically represented as a 0 or 1.

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4
Q

computer

A

A programable electronic device the stores, retrieves and processes data.

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5
Q

examples of computers

A

laptop

mobile phone

smart watch

games console

washing machine

pace maker

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6
Q

example of imput devices

A

keyboard

mouse

microphone

games controller

touch screen

web cam

scanner

graphics tablet

barcode reader

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7
Q

pixel

A

Short for “picture element” it is the fundamental unit of a digital image, typically a tiny square or dot which contains a single point of color of a larger image.

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8
Q

Order of file sizes

A

nibble

byte

kilobyte

megabyte

gigabyte

terabyte

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9
Q

What is ASCII?

A

A binary number representing every letter, number and symbol.

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10
Q

a nimble

A

4 bits

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11
Q

byte

A

a group of 8 bits

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12
Q

16 bytes

A

smiley face

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13
Q

How to add binary numbers?

A

Just like denary numbers (normal number) except instead of ten the number is multiple of two.

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14
Q

Grey scale display

A

Displays black, white, and shades of gray

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15
Q

capture

A

to catch, a capta, captura

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16
Q

retouch

A

To modify the details of an image

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17
Q

air brush

A

to alter an image using specialized software to conceal imperfections

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18
Q

inherit

A

existing in something as a permanent, essential, or characteristic attribute

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19
Q

jiggery-pokery

A

underhanded manipulations or dealings; trickery; dishonest behaviour

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20
Q

built-in

A

forming an integral part of a structure or device, inherent

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21
Q

hefty

A

heavy; big and strong, muscular; of considerable size or amount; robus, puternic, viguros

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22
Q

tunnel vision

A

1 : constriction of the visual field resulting in loss of peripheral vision.

2 : extreme narrowness of viewpoint : narrow-mindedness also : single-minded concentration on one objective.

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23
Q

Dithering

A

A process that makes the transition between shades smoother

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24
Q

desktop

A

on your desk

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25
Q

Why is a desktop better?

A

more powerful

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26
Q

laptop

A

same parts as a desktop

smaller than desktop

hard to update

mobile/ easy to move

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27
Q

tablet

A

even less parts

really small

slow processing

easy to move/ mobile

less memory

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28
Q

Network card

A

Allows computers to access networks
Wirelessly
Through an ethernet cable

29
Q

Motherboard

A

backboard

connects everything

green thing at the back

30
Q

Case/ outside

A

body

31
Q

CPU

A

Central Processing Unit

Fetches, decodes and executes code.

represents brain

needs to be kept cool

communicates and controls other parts of the computer

SSC

Faster and more efficient than a hard drive.

32
Q

What happens when a device overheats?

A

stop working
heat up if too much

33
Q

heatsink

A

takes heat from the computer

goes to fan

circulates air

little radiator

34
Q

RAM

A

Random Access Memory

Short term memory

in laptop, but smaller than in desktops

2.38GHz=gigabits per minute

Turning it back on means you have to retrieve it from there

Temporary storage data

Serves as computer’s working memory

35
Q

Graphics card

A

good for gamers

expansion card

generates output images on a display device

36
Q

Power supply unit(PSU)

A

Power Unit

feeds power to device

can’t run power to PC- would blow

Converts high voltage Alternating current (AC) to low voltage Direct currtent (DC) this i

37
Q

solid state drive

A

electronic

no moving parts

SSCs

some look like cartriges

invented in 1978

38
Q

magnetic tape storage

A

invened by J. Presper Eckert and John Mauchly
created in 1952

39
Q

hard drive

A

If you open up a hard drive is like a record player

invented by Reynold. B. Johnson

in 1965

data storage device

usually internally stored

uses magnetic storage to store and retrieve data

has rapidly rotating disks

disks coated in magnetic materials

disc spins

stick magnetically reads data

retains the data even when the device is switched off

40
Q

punch card

A

created by Sony Philips in 1980 or 1994

41
Q

Blue-ray

A

named after the blue laser used to read the discs in 2000

42
Q

Cloud Storge

A

invented by Dr. Joseph Carl Robnett Licklider in the 1960s

43
Q

kilobyte

A

1024 bytes

KB

44
Q

Megabyte

A

1073741824 bytes

MB

45
Q

metabytes

A

a set of data that describes and gives information about other data.

46
Q

Examples of metadata

A

size=x by y

colour=what colours are in the picture

date= what date it was taken

time= what time it was taken

47
Q

sound

A

faster than the tides

48
Q

sampling

A

collection data

49
Q

music sampling rate

A

44,100 samples a second

50
Q

music sampling

A

piece of audio from the smallest possible singular measurement of an amplitude stored on a computer up to the largest file a computer can hold

51
Q

longer samples

A

single sample of a wave form

52
Q

network

A

a group of two of more computer systems linked together

53
Q

LAN

A

Local Area Network

54
Q

WAN

A

Wide Area Network

55
Q

internet

A

A global network connecting millions of computers, making it possible to exchange information.

56
Q

What is a bitmap?

A

Representation of an image

tiny blocks of colour

57
Q

capturing sounds

A

Capture and log sounds

sample then store in binary

58
Q

Network

A

Group of two or more connected devices

59
Q

What are the types of networks

A

Local Area Network= LAN
Wide Area network= WAN
= example of WAN
=Internet

60
Q

What is a server?

A

A computer providing resources and/ or services.

61
Q

What is a network switch?

A

Connects devices together

Directs data around the network

62
Q

What is a Router?

A

Device which allows wireless connection to a network.

63
Q

What is eathernet cable?

A

Used to connect network hardware together.

64
Q

What is a firewall?

A

A piece of software.

Stops unwanted connections to your network.

65
Q

What is a data incription?

A

A method of changing the original characters in a message.

It hides or discusses the message.

66
Q

What is an anti-virus software?

A

Designed to detect and stop attacks from malware.

67
Q

What is the reason for secure passwords?

A

It is important for network security.

Prevent others from accessing your data

68
Q

What to remember when creating a password?

A

A combination of
small letters
capital letters
numbers
symbols
more digits, more secure

Year 8 Computing (3 decks)

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