JavaScript Quickstart

Quiz

Note: "The purpose of this quiz is to test your understanding of the concepts covered in this JavaScript Quickstart tutorial site. Don't worry if you don't know the answer to every question, just do your best and use the quiz as a learning opportunity. Good luck!"

Q: What are the three different ways to declare a variable in JavaScript?

var, let, and const var, const, and function var, let, and function

Q: Which operator is used for string concatenation in JavaScript?

+ - *

Q: What will be the output of this console.log(3+2+'7') ?

12 57 39

Q: What is the syntax for a 'for' loop in JavaScript?

for (var i = 0; i < 10; i++) for (i = 0; i < 10; i++) for (i < 10; i++; var)

Q: High-level, interpreted programming language that is widely used for web development.

Java HTML JavaScript

Question: Which function is used to display an alert box in JavaScript?

prompt() alert() confirm()

Q: Which function is used to display a prompt box in JavaScript?

confirm() prompt() alert()

Q: What is an array in JavaScript?

A collection of values of any type A collection of objects A collection of strings

Q: What is the index of the first element in an array?

0 -1 1

Q: What method can be used to add an element to the end of an array?

push() pop() unshift()