JavaScript

Question 1

Minimal Viable Product (MVP)

Answer 1

the simplest version of an app that a developer can share with users to receive feedback

Question 2

how do you link a JS file?

Answer 2

within the script tag

Question 3

where do you place the script tag?

Answer 3

at the very bottom of the html file, before the closing

Question 4

why is the JS linked at the bottom of the page?

Answer 4

when the browser sees a tag, it will immediately run the JS file preventing from moving onto the next html tag

Question 5

what is window.alert (“ “)?

Answer 5

alert window popup

Question 6

what is a function?

Answer 6

predefined action that we can call or invoke in our code (after we declare it earlier in the code)

Question 7

what does “passing an argument” mean?

Answer 7

placing content between the parentheses in a function

Question 8

what is an expression?

Answer 8

each piece of code, separated by semicolons

Question 9

how do you declare a function?

Answer 9

use the keyword function, followed by the name we want to give it

Question 10

what is the code between curly braces ({ }) called?

Answer 10

code block

Question 11

what does it mean to “call a function”?

Answer 11

telling the computer to run or execute that set of actions

Question 12

what do you need to do to allow a function to work?

Answer 12

call the function

Question 13

what is this an example of?

function fight ( ) {
window.alert (" ");
}

fight ( );

Answer 13

calling a function

Question 14

what is user input?

Answer 14

info that a user enters into a program

Question 15

what does this function do?

window.prompt (“ “)

Answer 15

a window pops up with an area for the user to input data

Question 16

what is a variable?

Answer 16

named location for a value that gets stored in the browser’s memory when a program is run

Question 17

how does the browser capture the data entered into a prompt by a user?

Answer 17

adding variables

Question 18

what is this an example of?

var playerName = window.prompt (“ “)

Answer 18

a variable. we give the data a variable name (playerName) allowing us to refer to it consistently by just calling on that name

Question 19

var keyword

Answer 19

whenever this keyword is used it tells the program that we are creating a new variable and the next word is going to be the name of the variable

Question 20

what is a variable name?

Answer 20

the actual name that will store the info assigned to the variable - the browser will store this name to recall later in the program

Question 21

what is camel casing?

Answer 21

only use with two worded names - the first word is lower case with the first letter in the second word being capitalized

Question 22

what is an assignment operator?

Answer 22

(=) used to set the value to a variable name

Question 23

what is a string data type?

Answer 23

sting of text - must be wrapped in “ “

Question 24

what is number data?

Answer 24

a whole number or decimal

Question 25

what is boolean data?

Answer 25

only given a value of true or false

Question 26

how do you create a comment in JS?

Answer 26

/* */

Question 27

what is the console.log?

Answer 27

a method for develops to write code inconspicuously to let developers know what the code is doing

Question 28

what is a screen concantenation?

Answer 28

string data that needs to include variable data

Question 29

what is this an example of? console.log ("Tony" + "is ready.");

Answer 29

a screen concantenation

Question 30

when we concantenate strings we need to include a leading or trailing ___ so the variable doesn't run up against the word before or after it

Answer 30

spaces

Question 31

what are the two ways to create a function?

Answer 31

``` function declaration: create a function using the function keyword first ex. function fight () { } ``` ``` function expression: create a function by assigning it to a variable ex. var fight = function () { } ```

Question 32

what happens when you list a variable name on the left side of the assignment operator?

Answer 32

stores data to that variable

Question 33

what happens when you list a variable name on the right side of the assignment operator?

Answer 33

we will use the actual value that variable holds at that moment

Question 34

what does "state" mean?

Answer 34

refers to the data in our application at a specific point in time- conveys what is happening now and helps decide what happens next

Question 35

what are conditions?

Answer 35

checks performed on the status of our code and helps the program determine what to do

Question 36

what is this an example of? if (playerHealth > 0) { console.log ("Your player is still alive!"); }

Answer 36

a condition

Question 37

why do we use the "if" keyword in a condition?

Answer 37

its telling the browser that we're going to check for a condition to be true or false and execute a block of code based on the result

Question 38

what is this an example of? ``` if (playerHealth === 0) { console.log("this will not run"); } else { console.log ("this will run instead"); } ```

Answer 38

a control flow statement

Question 39

what are three equal signs used to do? | ===

Answer 39

allows you to check if two values are directly equal to one another

Question 40

what is pseudocode?

Answer 40

plain-language description of the steps that an application must complete

Question 41

what is an array?

Answer 41

a data structure designed to store data as a list (ex. var enemyNames = ([tony, roborto, james]);

Question 42

what is primitive data?

Answer 42

data that only holds one value, such as a string, integer, or boolean

Question 43

what is object data?

Answer 43

datatype that can store more than one value of data

Question 44

why are for loops used?

Answer 44

used whenever you need the same operation done repetitively

Question 45

what is this an example of? ``` for (var i = 0; i < 3; i++) { console.log("apple"); } ```

Answer 45

a for loop

Question 46

what is the control flow?

Answer 46

the order in which the computer executes statements in a JS file

Question 47

the ____ is the statement executed, initializing the loop iterator or counter

Answer 47

``` initial expression ex. var i = 0; ```

Question 48

the ___ statement is evaluated after the initial expression, if the condition evaluates to be true, the loop executes - if the value is false, the loop terminates

Answer 48

condition | ex. i < 3;

Question 49

the ____ executes, incrementing the iterator, which is the variable i

Answer 49

increment expression | ex. i++

Question 50

what is the while loop?

Answer 50

type of control flow statement that loops or repeatedly executes a statement while a condition remains true

Question 51

variables that are declared outside of any functions are considered ____

Answer 51

global

Question 52

____ scope can only be accessed within the scope of a function

Answer 52

local scope

Question 53

if a global variable and local variable have the same name, the ____ variable will take precedence

Answer 53

local

Question 54

when do you use switch statements?

Answer 54

when checking a single value against multiple possibilities or cases