Day 1

Question 1

Data type that is unique and cannot be changed. Not important to learn right now

Answer 1

Symbol

Question 2

Press this key on your keyboard to execute the code in the Console tab.

Answer 2

Enter

Question 3

Value is primitive, only if it’s not an _______.

Answer 3

Object

Question 4

A data type which is a sequence of characters.

Answer 4

String

Question 5

Large integers than the Number type can hold.

Answer 5

BigInt

Question 6

This means that the language is a lot easier to write and to learn because it abstracts almost everything.

Answer 6

High-level

Question 7

We use comments in JS too! To write a single line comment type ________.

Answer 7

//

Question 8

A data type which is a Logical type: true or false.

Answer 8

Boolean

Question 9

You need to use ________ (single or double) when creating a string!

Answer 9

Quotes

Question 10

JS is a _________, __________, and multi-__________ programming language.

Answer 10

JS is a high-level, object-oriented, multi-paradigm programming language.

Question 11

This means that we can use various programing styles such as imperative and declarative.

Answer 11

Multi-paradigm

Question 12

What code to use when you want to alert or pop up a string ‘Hello World’ in the browser?

Answer 12

alert(”Hello World!”)

Question 13

Use all _________ letters when naming a variable that is constant.

Answer 13

Uppercase

Question 14

We used an HTML _________ tag inside of the head tag and we put some line of JS code there.

Answer 14

script

Question 15

The most fundamental unit of info in programming.

Answer 15

Value

Question 16

To determine the type of a value, use an operator called ________.

Answer 16

typeof

Question 17

The script tag can be inside of the _______ tag or the ______ tag, it has its differences which will be discussed later.

Answer 17

head or body tag

Question 18

To use multi line comment _________.

Answer 18

/* */

Question 19

Shortcut to open developer tools in Chrome.

Answer 19

Ctrl+Shift+I

Question 20

JavaScript has __________ which means JS automatically determines the data type you assigned in a variable. We do not need to manually define what data type we are using like in other programming languages. This also means that a variable can be changed into any data type (this could cause problems which is why TypeScript is utilized).

Answer 20

Dynamic typing

Question 21

Variables cannot be named after a _________ keyword!

Answer 21

Reserved

Question 22

Value taken by a variable but not yet defined.

Answer 22

Undefined

Question 23

Numbers always have ____________ even if you explicitly did not put any.

Answer 23

Decimal values

Question 24

Variable name cannot start with a __________!

Answer 24

Number

Question 25

Every value is either an ___________ or __________ value.

Answer 25

Object or primitive

Question 26

Data type that means ‘empty value’.

Answer 26

Null

Question 27

Where you store or assign values to use them over and over again

Answer 27

Variable

Question 28

This means that the language is mostly based on the concept of objects for storing most kinds of data.

Answer 28

Object-oriented

Question 29

In JS, all of the Number data types are __________ numbers.

Answer 29

Floating point numbers

Question 30

Name your variables very __________. This is a convention.

Answer 30

Descriptive

Question 31

Open the HTML file, then we write JS code in what we called an ______ script, basically a JavaScript code written inside of an HTML file.

Answer 31

Inline

Question 32

We then create an external JS file (script.js) and link it by using a _______ attribute. Because its not okay to put JS code in the HTML file. This also makes it more organized.

Answer 32

src

Question 33

There is a reserved word called _______ that can be actually used as a variable name but it could cause problems so avoid it.

Answer 33

name

Question 34

We use this naming convention in JS.

Answer 34

camelCase

Question 35

When you check the typeof a null data type it will return as ________. This is a bug and should return null.

Answer 35

object

Question 36

The _______ has the data type not the variable!

Answer 36

Value

Question 37

Variables can only contain letters, numbers (as long as its not at the start), ________ and __________.

Answer 37

Underscore and dollar sign

Question 38

You can go back to some commands you’ve used by pressing _______ commands.

Answer 38

Arrow commands