Quiz #2

Instructions

1. Fork this repo
2. Clone your fork
3. Fill in your answers by writing in the appropriate area, or placing an 'x' in the square brackets (for multiple-choice questions).
4. Add/Commit/Push your changes to Github.
5. Open a pull request.

JavaScript

Question #1

What of the following are JavaScript Data Types?

Select all that apply:

[] String
[] Boolean
[] Undefined
[] NaN
[] Number
[] Array
[] Null

Question #2

Explain what is a REPL, and why is it important for us as developers and help with debugging?

Question #3

Given the Following Array

var foods = [ ["apple","banana","strawberry"], ["pizza","fries","hamburger"] ];

Create a For Loop that outputs the following string for each piece of fruit in the console. "I want to eat a [fruit]"

// write code here

Question #4

Given the Following Array

var foods = [ ["apple","banana","strawberry"], ["pizza","fries","hamburger"] ];

How would I go about accessing the string "pizza" in the above array?

// write code here

Scope/Context/Closures

Question #5

Describe the rules of scope in JavaScript.

Your Answer:

Question #6

Define an object and store it in a variable pizza. The object should have 2 properties: a temperature (set to 70), and a method called bake. When called, this method should set the pizza's temperature to be 300. Note: you may not use the variable pizza inside your method.

Your Answer:

// write code here

Question #7

Using a 'for' loop, iterate over an array of numbers in JavaScript, printing each to the console.

Your Answer:

// write code here

Question #8

Write the vanilla JS equivalent of the following jQuery code:

$("button").on("click", function(event){
  $(event.target).css('color', 'red')
})

Your Answer:

// write code here

Objects and Functions

Question #9

What are the differences between calling and referencing a function? Please provide examples of each.

Question #10

Using the object literal notation, Define an object called student and give it the properties (your attributes) of name, age, and a method sayHello, that outputs "Hi, my name is [your_name]".

Your Answer:

// write code here

Callbacks

Question #11

What is the difference between synchronous and asynchronous program execution?

Select all that apply:

[] Synchronous code runs at an even pace, asynchronous code runs with uneven pacing.
[] Synchronous code runs all at the same time, asynchronous code runs completely randomly
[] Synchronous code runs in order (as appears in the source), asynchronous code may run at a later time.