Basic JS

Start

100

This is used to store key/value pairs.

An Object

200

This is data that is passed into a called function. 

An Argument. 

300

These are placeholders in a function to hold meaning for data received by a function call. 

A Parameter. 

400

This returns an array of modified elements. 

.Map

500

What keyword is used to point to the direct function/object you're inside of?

This

Begin

100

What is returned when "This" keyword is used in a global scope?

Undefined. 

200

DOM stands for what?

Document Object Model

300

What array property is used to find the length of an array?

Array.length

400

Let, const, and var allow you to create what?

A new variable.

500

Text typically written in quotation marks is known as what?

A string. 

let myArray

100

let myArray = ["Cat", "Dog", "Octopus", "Lemon"]

myArray[2] would retrieve what item within this array?

Third item or "Octopus".

200

let myArray = ["Cat", "Dog", "Octopus", "Lemon"]

myArray.push("Goldfish")

What will this output?

Add "Goldfish" to the end of the array. 

300

let myArray = ["Cat", "Dog", "Octopus", "Lemon"]

let newArray = myArray.splice(2, 0, "Hawk");

What will newArray equal when this is executed?

"Cat", "Dog", "Hawk", "Octopus", "Lemon"

400

let myArray = ["Cat", "Dog", "Octopus", "Lemon"]

What will 

let myArray = myArray.splice(1, 1, "Scout") 

change within the array?

Change "Dog" to "Scout".

500

let myArray = ["Cat", "Dog", "Octopus", "Lemon"]

What will 

myArray.pop()

change within the array? 

Removes "Lemon".

Harder

100

Snippets, VS Code, and your console are ways to do what within your browser?

Write and execute code. 

200

Printing or "showing" JavaScript information/data within your dev tool console is known as what?

Console.log

300

What does the .shift() array method change when the array is called on?

Changes the length of an array. 

400

What will appear in the console? 

const str1 = "Battlestar Galactica"

const str2 = "is better than Dr. Who?"

console.log(str1.concat(' ', str2));  

"Battlestar Galactica is better than Dr. Who?"

500

What method converts all string characters into lowercase? 

.toLowerCase()

?????

100

What would 

Number("Grapefruit") return?

NaN

200

What is the name of an object represented as true or false?

A Boolean. 

300

What will output in the console.log? 

let cat="Heathcliff" 

cat = "Hello Kitty"

console.log(cat)

"Hello Kitty"

400

What method removes whitespace from the beginning and end of a string?

.trim()

500

What will  alphaNumeric equal when executed? 

const letters = ["a", "b", "c"];

const numbers = [1, 2, 3];

const alphaNumeric = letters.concat(numbers);

['a', 'b', 'c', 1, 2, 3]