security and other computing basics

Question 1

What is a variable?

Answer 1

A name for a storage.

Question 2

What is a sequence?

Answer 2

The order in which instructions are executed.

Question 3

What is a condition?

Answer 3

Something that determines if something else is true or false.

Question 4

What is a selection?

Answer 4

Something that involves making a decision based on a condition, leading to different pathways.

Question 5

What is an iteration?

Answer 5

A loop.

Question 6

What is an assignment?

Answer 6

When you give a value to a variable.

Question 7

What is a Modularisation?

Answer 7

When you break a program down into smaller pieces.

Question 8

What is the symbol for addition used in JavaScript?

Answer 8

+

Question 9

What is the symbol for subtraction used in JavaScript?

Answer 9

-

Question 10

What is the symbol for multiplication used in JavaScript?

Answer 10

*

Question 11

What is the symbol for division used in JavaScript?

Answer 11

/

Question 12

What is the symbol for finding the remainder used in JavaScript?

Answer 12

%

Question 13

What is the symbol that is used for start/end in a flowchart?

Answer 13

Oval

Question 14

What is the symbol that is used for input/output in a flowchart?

Answer 14

Parallelogram

Question 15

What is the symbol that is used for Process in a flowchart?

Answer 15

Square

Question 16

What is the symbol that is used for decision in a flowchart?

Answer 16

Diamond

Question 17

What are the two types of encryption?

Answer 17

Symmetric and Asymmetric encryption.

Question 18

What makes a strong password?

Answer 18

12-14 characters long
combination of uppercase and lower cans letters, numbers and symbols
not a word that can be found in the dictionary
different from previous passwords
easy for you to remember but hard for others to guess
not previously used.

Question 19

What does a hash do?

Answer 19

It turns information into a unique scrambled code

Question 20

What is frequency analysis?

Answer 20

It is the study of the frequency of letters.

Question 21

What is a frequency analysis used for?

Answer 21

It is used forbreaking cipher texts.

Question 22

What is compression?

Answer 22

Compression is a technique used to reduce the size of data while preserving its information.

Question 23

What are the two main types of compression?

Answer 23

Lossless compression and lossy compression.

Question 24

What is the difference between the two types of compression?

Answer 24

lossy compression loses some data while lossless compression doesn’t lose any data.

Question 25

What is a type of lossless compression?

Answer 25

Run length coding.