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JavaScript Basics Quiz

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Question 1/15

How do you call a method named "calculate" of an object named "mathObj"?

Select your answer

mathObj:calculate()

mathObj.calculate()

mathObj.calculate

mathObj(calculate)

Question 2/15

What method is used to add new elements to the end of an array?

Select your answer

append()

add()

push()

insert()

Question 3/15

What is the correct syntax for referring to an external JavaScript file called 'app.js'?

Select your answer

Question 4/15

What will the following function return?

function myFunction() {
    return 5 + 3;
}

Select your answer

undefined

Question 5/15

Which operator is used to assign a value to a variable?

Select your answer

===

Question 6/15

What is the correct way to declare a variable in JavaScript?

Select your answer

declare myVariable;

v myVariable;

variable myVariable;

var myVariable;

Question 7/15

What is a typical use case for the "isNaN()" function?

Select your answer

To check if a value is not a number.

To append a string to a number.

To convert a value to a string.

To find the maximum number.

Question 8/15

Which company developed JavaScript?

Select your answer

Apple

Sun Microsystems

Microsoft

Netscape

Question 9/15

What will the following code output?

var fruits = ['Apple', 'Banana', 'Mango'];
console.log(fruits[1]);

Select your answer

fruits

Apple

Mango

Banana

Question 10/15

What is the output when you execute the following code?

console.log(typeof 42);

Select your answer

object

string

number

integer

Question 11/15

Which of the following data types exists in JavaScript?

Select your answer

Character

Hexadecimal

String

Tuple

Question 12/15

Which of these is not a reserved word in JavaScript?

Select your answer

program

throw

default

switch

Question 13/15

Which one of these is an Arrow Function syntax?

Select your answer

func (x, y) => x + y

function(x, y){ return x + y; }

(x, y) => x + y

function => (x, y){ x + y }

Question 14/15

How do you create a function in JavaScript?

function myFunction() {
    // code here
}

Select your answer

create function myFunction()

function:myFunction()

new Function myFunction()

function myFunction()

Question 15/15

Which of the following is a string method in JavaScript?

Select your answer

getElementById()

setTimeout()

toUpperCase()

parseInt()

Your Results

You did not answer any questions correctly.

Your Answers

Question 1/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you call a method named "calculate" of an object named "mathObj"?

Available answers

mathObj:calculate()

mathObj.calculate()

mathObj.calculate

mathObj(calculate)

Methods of objects are called using the dot notation:

object.method()

Question 2/15

😊 Your answer was correct 🙁 Your answer was incorrect

What method is used to add new elements to the end of an array?

Available answers

append()

add()

push()

insert()

The

push()

method adds one or more elements to the end of an array.

Question 3/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is the correct syntax for referring to an external JavaScript file called 'app.js'?

Available answers

To include an external JavaScript file, you use the

<script src='app.js'></script>

syntax.

Question 4/15

😊 Your answer was correct 🙁 Your answer was incorrect

What will the following function return?

function myFunction() {
    return 5 + 3;
}

Available answers

undefined

The function calculates

5 + 3

and returns

Question 5/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which operator is used to assign a value to a variable?

Available answers

===

The assignment operator in JavaScript is

, used to assign values to variables.

Question 6/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is the correct way to declare a variable in JavaScript?

Available answers

declare myVariable;

v myVariable;

variable myVariable;

var myVariable;

In JavaScript, you declare a variable using the

var

let

, or

const

keyword, such as

var myVariable;

Question 7/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is a typical use case for the "isNaN()" function?

Available answers

To check if a value is not a number.

To append a string to a number.

To convert a value to a string.

To find the maximum number.

The

isNaN()

function checks if a value is NaN (Not-a-Number).

Question 8/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which company developed JavaScript?

Available answers

Apple

Sun Microsystems

Microsoft

Netscape

JavaScript was developed by Netscape as a client-side scripting language.

Question 9/15

😊 Your answer was correct 🙁 Your answer was incorrect

What will the following code output?

var fruits = ['Apple', 'Banana', 'Mango'];
console.log(fruits[1]);

Available answers

fruits

Apple

Mango

Banana

Arrays in JavaScript are zero-indexed, so

fruits[1]

contains

'Banana'

Question 10/15

😊 Your answer was correct 🙁 Your answer was incorrect

What is the output when you execute the following code?

console.log(typeof 42);

Available answers

object

string

number

integer

The

typeof

operator returns

'number'

for numerical literals like

Question 11/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which of the following data types exists in JavaScript?

Available answers

Character

Hexadecimal

String

Tuple

JavaScript supports data types such as

String, Number, Boolean, Object

, but not specific types like

Character

Tuple

Question 12/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which of these is not a reserved word in JavaScript?

Available answers

program

throw

default

switch

The word

program

is not a reserved keyword in JavaScript, unlike

switch, throw, default

Question 13/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which one of these is an Arrow Function syntax?

Available answers

func (x, y) => x + y

function(x, y){ return x + y; }

(x, y) => x + y

function => (x, y){ x + y }

An Arrow Function does not use the

function

keyword and looks like

(x, y) => x + y

Question 14/15

😊 Your answer was correct 🙁 Your answer was incorrect

How do you create a function in JavaScript?

function myFunction() {
    // code here
}

Available answers

create function myFunction()

function:myFunction()

new Function myFunction()

function myFunction()

To define a function in JavaScript, use the syntax:

function myFunction() { /* code */ }

Question 15/15

😊 Your answer was correct 🙁 Your answer was incorrect

Which of the following is a string method in JavaScript?

Available answers

getElementById()

setTimeout()

toUpperCase()

parseInt()

The

toUpperCase()

method converts a string to uppercase letters.