Javascript Basics
Authored by tiya reba
Education
Professional Development
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT a valid data type in JavaScript?
let
var
float
const
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct way to write a comment in JavaScript?
<!-- This is a comment -->
// This is a comment
/* This is a comment */
This is a comment
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
You are creating a web application for a dog walking business. In the code, you want to check if a dog is considered a puppy (less than 1 year old) to determine the walk price. Which if statement would work for this?
if (dogAge > 1) { // set puppy price }
if (dogAge < 1) { // set puppy price }
if (dogAge <= 365) { // set puppy price }
if (dogAge < 1) { // set puppy price }}
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the NaN value represent in JavaScript?
Not a Number
Null
No Arguments
Negative Nymber
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you access the length of an array in JavaScript?
array.length()
length(array)
array.length
lengthOf(array)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the return statement do in a JavaScript function?
It terminates the function execution.
It returns a value from the function.
It defines a new function.
It creates a loop.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you define a function in JavaScript
function = climbUp();
fun = "climbUp";
function climbUp();
fun = (climbUp());
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