Year 9 Recap

Question 1

pharming

Answer 1

re-directing users to a fake copy of the real website

Question 2

shoulder surfing

Answer 2

watching a user enter their passwords or pins without them knowing

Question 3

algorthims

Answer 3

a sequence of instructions to complete a task/goal

Question 4

abstraction

Answer 4

process of removing unnecessary information/details

Question 5

decomposition

Answer 5

breaking down a problem into smaller sub-problems

Question 6

ALU

Answer 6

Arithmetic Logic Unit

> maths & tasks get completed

Question 7

clock

Answer 7

everything is running at the same time

Question 8

variable

Answer 8

stores a value

Question 9

indefinite iteration

Answer 9

continuously repeats until a criteria is met

Question 10

bubble sort

Answer 10

used to sort lists

Question 11

CU

Answer 11

control unit

> decodes

Question 12

Register

Answer 12

instructions wait to get called by the bus to the ALU

Question 13

trace tables

Answer 13

used to help test algorithms before programming

Question 14

iteration

Answer 14

repeats code

Question 15

definite iteration

Answer 15

repeats code a set number of times until a goal is met

Question 16

RAM

Answer 16

Memory

Question 17

Linear search

Answer 17

> 1 by 1

>looks at each individual item until a goal is met

Question 18

Binary Search

Answer 18

> data must be in order
splits down the middle
ignores &disregards other data if it does not match the criteria

Question 19

Pseudocode

Answer 19

common programming language

Question 20

black hat hackers

Answer 20

illegal hackers- steal data

Question 21

grey hat hackers

Answer 21

illegal but tell companies their weakness’(eg passwords&usernames)

Question 22

white hat hackers

Answer 22

ethical and legal hacking

Question 23

biometric

Answer 23

a personalised password (eg thumbprint, retina scanner)

Question 24

lossy

Answer 24

> shrinks file

>takes away quality

Question 25

loseless

Answer 25

> shrinks file

>takes no original quality

Question 26

blagging

Answer 26

creating a scenario to convince someone that they should give away confidential information to someone in ‘authority’

Question 27

phishing

Answer 27

emailing users and asking them to log on to a fake account online (eg bank)