DTE t2y9

Question 1

What is an algorithm?

Answer 1

An Algorithm is a set of steps you must follow to achieve an outcome

Question 2

What is a variable?

Answer 2

A variable is a named placeholder in memory that can store information/data and can be changed. OR it is a container that holds a value

Question 3

What are some examples of variables?

Answer 3

• A score or current level on game called score
• A mobile phone number called mobileNumber
• A name called firstName; surname

Question 4

What are the types of variable names?

Answer 4

The names that you give a variable is important. Variable names must be meaningful and descriptive. A variable with two word can be used as:
camelCase
kebab-case
snake_case

Question 5

What are the 4 variable guidlines?

Answer 5

• cannot start variable name with number
• Cannot start with an uppercase letter
• Cannot have spaces
• Must be unique

Question 6

What is an integer?

Answer 6

Any whole number such as -17, 2, 10

Question 7

What is a float?

Answer 7

A decimal number because the decimal point “floats” such as 5.4, 0.2

Question 8

What is a character?

Answer 8

A single alpha character such as: H, &, #

Question 9

What is a string?

Answer 9

A series of characters such as book name, heading or address

Question 10

What is a date?

Answer 10

Anything such as 5/05/2025

Question 11

What is time?

Answer 11

generally in 12 hour clock

Question 12

What are the two types of an algorithm?

Answer 12

Flowchart and pseudocode

Question 13

What is pseudocode?

Answer 13

plain language description of steps in an algorithm

Question 14

What are the six keyword groups of psuedocode?

Answer 14

1. BEGIN, END
2. INPUT
3. OUTPUT or PRINT or DISPLAY
4. IF, THEN, ELSE, END IF
5. FOR, TO, DO, NEXT, ENDFOR
6. WHILE, ENDWHILE

Question 15

What is the rule in writting key words of pseudocode?

Answer 15

They must be bold and capital

Question 16

What are + used for in pseudocode?

Answer 16

Plus signs are not maths they are just used for linking words together.

Question 17

What is * used for in pseudocode?

Answer 17

Multiplication

Question 18

What is the % used for in pseudocode?

Answer 18

It is called modules and it means when you divide by a number what is the remainder. For example, 5 % 2 is one remainder.

Question 19

What is the == mean in pseudocode?

Answer 19

It means if something equals that. It is not directly assigning it to a value like a normal = would do but it is saying IF it equals that.

Question 20

What does <> mean in pseudocode?

Answer 20

Not equivalent to

Question 21

What does AND mean in pseudocode?

Answer 21

Both sides of the equation must be true

Question 22

What does OR mean in pseudocode?

Answer 22

Either side of the equation must be true

Question 23

What does NOT mean in pseudocode?

Answer 23

When something isn’t true

Question 24

What are the two types of iteration?

Answer 24

Fixed loop and not fixed loop. A fixed iteration is telling the computer specifically how many times you want it to loop. You can also have a not fixed iteration where you can create a variable iteration so while the variable is true it will continue to loop through

Question 25

Explain JavaScript

Answer 25

JavaScript is the way in which a website works. So html is the structure, css is the style and javascript is how it runs.

Question 26

What is console log in JavaScript and how is it written?

Answer 26

Console log is a JavaScript function that outputs messages to the console. To type console log you would put: console.log("whatever you want to output");

Question 27

What is an alert in JavaScript

Answer 27

An alert is a popup on the screen that can say a certain message. For example: alert ( "hello world"); would have a pop up message that says hello world

Question 28

How do write comments in JavaScript?

Answer 28

A comment is ignored and not read my a computer. //this is a single line comment /* any thing between this is part of a comment */

Question 29

How do you create a variable in JavaScript?

Answer 29

var name; var score; This is creating different variables that hold certain info You can also assign these variables like: var name = Ruth;