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Foundation
Introduction Get Started Console Basics Basics Addition Calculator Variables Simple Swapping Constants Comments Data Types Data Types Sorted Numbers Control Flow Functions Linear Search Iterative Factorial Operators Rudimentary Calculator Palindromes Scopes Values and References Foundation
Numbers
Basics Finding The Minimum Number Methods Number Methods Better Precision Math Object Bisection Method Numbers
Strings
Basics Bitwise NOT Unicode Manual Uppercasing Letter Frequency String Methods Hyphenated Words endsWith() Polyfill Title Casing Camel Words String Split Strings
Conditions
Booleans if-else Exam Grades switch Status Codes Ternary Operator Conditions
Loops
for Loop Multiply All Greatest Common Divisor Selection Sort while Loop Collatz Conjecture Loops
Arrays
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Functions
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Objects
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Exceptions
Introduction Basics Required Arguments
HTML DOM
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CSSOM
Introduction The style Property Viewport Colored Squares Screen Client Grid Lines Elements Computed Styles CSSOM
Events
Introduction Basics A Simple Counter Many Counters Event Objects Div Clicked?Sortable Tables Event Propagation Mouse Events Pointer Circle Creating Rectangles Right-Click Menu Keyboard Events Scroll Event Scroll Event Load Events Hashchange Event Popstate Event Popstate Event
Drag and Drop
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Touch Events
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Home > Courses > JavaScript > Foundation - Quiz

JavaScript Foundation Quiz

Quiz prerequisites

All of JavaScript Foundation Unit

Foundation

Values and References

Numbers

Basics

Are you ready?

1 questions to solve.

Instructions

This quiz goes to full-screen once you press the Start button.
At the end of the quiz, you are able to review all the questions that you answered wrong and see their explanations.

JavaScript can go inside an HTML tag and a seperate file.
True or false?

JavaScript can go inside the <script> tag and an external .js file. Hence the question is True.

True False

<script> tags can be nested inside head and body
True or false?

Please refer to where to write JavaScript for more details.

True False

1str is a valid JavaScript variable name.
True or false?

Variable names can't begin with numbers hence option (A) is wrong.

True False

What is var str usually called?

Please refer to JavaScript variables for more details.

Variable declaration Variable assignment Variable hoisting None of the above

How do variables and constant differ?

Both variables and constants can be used in an expression; hence option (A) is wrong and (B) is correct.

A variable's value can change during script execution whereas a constant's can't A variable can be used in an expression whereas a constant can't Both of the above None of the above

What is variable hoisting?

Hoisting is to bring up a variable declaration in its scope. For more info please visit JavaScript Variables.

Bringing a variable declaration up its scope Calling a variable inside a function None of the above

A tertiary operator takes three operands.
True or false?

A unary operator takes one operand, a binary takes two and a tertiary takes three. More on JavaScript Operators.

True False

Of the following which one shows an example of a string primitive?

Please refer to JavaScript Datatypes for more details.

"A string" new String("A string") Both of the above None of the above

In JavaScript we can give comments using

Please refer to JavaScript Comments for more details.

// /**/ Both of the above None of the above

JavaScript variable names are case-sensitive.
True or false?

Please refer to JavaScript Variables for more details.

True False

A unary operator takes how many operands?

Unary, binary and tertiary operators take 1, 2 and 3 operands respectively. For more info refer to JavaScript Operations.

1 2 3

Foundation

Values and References

Numbers

Basics

JavaScript

Completed

Foundation

Numbers

Strings

Conditions

Loops

Arrays

Functions

Objects

Exceptions

HTML DOM

CSSOM

Events

Drag and Drop

Touch Events

Misc

JavaScript Foundation Quiz

Quiz prerequisites

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150+ JavaScript Questions (with Answers)

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