JavaScript

Question 1

Lines of code that Javascript will intentionally ignore.

Answer 1

Comments

Question 2

In computer science, what is data?

Answer 2

Anything that is meaningful to the computer

Question 3

How many different data types does Javascript have?

Answer 3

7

Question 4

What does string mean?

Answer 4

Any sort of text

Question 5

What is number?

Answer 5

A number

Question 6

What is undefined?

Answer 6

Something that hasn’t been defined

Question 7

What is null?

Answer 7

Nothing

Question 8

What is a boolean?

Answer 8

True or false

Question 9

Symbol

Answer 9

An immutable primitive value that is unique

Question 10

What is an object?

Answer 10

Stores a lot of different key value pairs

Question 11

Where do you set data?

Answer 11

Into a variable

Question 12

What does a variable allow computers to do to data?

Answer 12

Store and manipulate it in dynamic fashion

Question 13

How do you declare a variable?

Answer 13

var keyword

Question 14

What is it common to set something to?

Answer 14

A string

Question 15

How many ways can you declare a variable?

What are they?

Answer 15

3

Var, let, const

Question 16

Where can var be used?

Answer 16

Throughout the entire program

Question 17

Where can let be used?

Answer 17

Within the scope of where you declared it

Question 18

What is const?

Answer 18

A variable that can never change

Question 19

What happens if you try to change a const?

Answer 19

ERROR

Question 20

What is the equal sign?

Answer 20

Assignment operator

Question 21

How do you assign a variable?

Answer 21

var (blank);

Question 22

Why should you use a semicolon?

Answer 22

So you know where the end of the line is

Question 23

var b = 2;

What does this line mean?

Answer 23

2 is being assigned to B.

Question 24

How would you assign 7 to a?

Answer 24

a = 7;

Question 25

What does console.log do?

Answer 25

Allows you to see things in the console

Question 26

What does uninitialised mean?

Answer 26

The value is undefined and we have not set it to anything

Question 27

Variable names and function names in JS are what?

Answer 27

Case sensitive

Question 28

What does increment a number mean?

Answer 28

To add 1 to it

Question 29

What is a quicker way to increment a number?

Answer 29

myVar++

Question 30

What are decimals referred to in JS?

Answer 30

Floats

Question 31

What does hard coding mean?

Answer 31

Putting something into your source code

Question 32

What is JavaScript?

Answer 32

Allows you to store and manipulate data (what you see on a website)

Question 33

What does osm stand for?

Answer 33

Open street map

Question 34

What is a style tag?

Answer 34

It’s how you control the format of what things look like

Question 35

How does JSON Parse work?

Answer 35

It takes the data that’s in text format and converts it to a JavaScript

Question 36

What is JSON?

Answer 36

JavaScript Object Notation and is an open standard data interchange format