computing - year 10 exams

Question 1

What adds to the file size of a bitmap?

Answer 1

Filetype
Resolution
Height and width

Question 2

Bitmap file size formula

Answer 2

Width * height * colour depth

Question 3

What is colour depth

Answer 3

Number of bits used to indicate the colour of a single pixel

Question 4

What is a pixel

Answer 4

Smallest point or element of a digital image. It is one colour

Question 5

Why compress files

Answer 5

Makes files smaller
Easier to transfer data
Cheaper and better for the environment

Question 6

What’s lossless compression

Answer 6

No loss of info

Question 7

Lossy compression

Answer 7

Reduction of bits - actually removing bits from the file

Question 8

How is ASCII limited

Answer 8

Can only express 128 characters as it is 7 bit.

English alphabet is mainly represented, other alphabets cannot be represented due to this.

Question 9

What is a protocol

Answer 9

A set of rules that devices on a network must follow if they want to communicate

Question 10

What is Ethernet

Answer 10

Data transmitted in packets
Communicates by using network interface or adapter

Question 11

What is Wi-Fi

Answer 11

Wireless connection between devices
Connects an access point between a wireless LAN and a LAN
Travels through a share medium

Question 12

What is TCP

Answer 12

Transmission Control Protocol

Web page is split into packets
TCP detects errors in the transmission f the packets
Will break the message if there is an error

Question 13

What is UDP

Answer 13

User Datagram Protocol
Like sending a letter
Data might get lost

Question 14

What is IP

Answer 14

Internet Protocol
IP address to uniquely identify computers

Net ID identifies the network
Host ID identifies the host (usually last two digits of the IP)

Question 15

HTTP vs HTTPS

Answer 15

Both send requests to web servers using a web browser
However HTTPS encrypts and decrypts the user’s page requests and pages returned

Question 16

FTP

Answer 16

Allows a file from one host to transfer to another host

(File transfer protocol)

Question 17

SMTP vs IMAP

Answer 17

SMTP - transfers emails to different servers e.g. gmail to yahoo

IMAP - allows emails to be stored locally and on a remote server

Question 18

What is hardware

Answer 18

The physical components of a computer.
A platform on which software executes

Question 19

What is software

Answer 19

Sequence of instructions called programs
Understood and executed by hardware

Question 20

Logic NOT gate shape

Answer 20

Triangle

Question 21

Logic AND gate shape

Answer 21

D

Question 22

Logic OR gate shape

Answer 22

Fish

Question 23

Logic XOR gate shape

Answer 23

Fish with curvy line

Question 24

Operating system

Answer 24

Error handling
Security
Program management

Question 25

what is left shifting

Answer 25

double the value

Question 26

tcp model

Answer 26

application later- HTTPs SMTP IMAP FTP
transport later - TCP UDP
internet layer - IP
link layer

Question 27

tcp model acronym

Answer 27

a tree is lanky

Question 28

what’s a virus

Answer 28

software that embeds itself in other programs or data files

Question 29

what’s trojan horse

Answer 29

can appear as a game to be installed

once installed, it can create an opening for personal info to be stolen

cannot be spread

Question 30

what’s spyware

Answer 30

fathers info abt an organisation or person without knowledge

personal info collection

Question 31

what’s adware

Answer 31

not illegal
just cookies and stuff
uses user info to present ads

Question 32

what is symbol for and in boolean expression

Answer 32

. (dot)

Question 33

symbol for a not boolean expression

Answer 33

— (line)

Question 34

boolean expression for or

Answer 34

+

Question 35

boolean expression for exclusive or

Answer 35

+ with a circle around it kinda like a wheel