removeAttr()

deleteAttribute()

removeAttribute()

deleteAttr()

element.appendChild()

element.insertChild()

element.addChild()

element.attachChild()

element.getChildren()

element.childNodes

element.getElementsByTagName()

element.getChildNodes()

It checks if a value is a number

It checks if a value is not a number

It converts a value to a number

It checks if a value is undefined

var defines a variable while let defines a constant.

There is no such major difference between them.

The value of a variable declared with var can be changed while the value of a variable declared with let cannot be changed.

var defined function scoped variable while let define block scoped variable.

<javascript>

<script>

<scripting>

<link>

classList.add()

classList.remove()

classList.toggle()

classList.replace()

onkeypress

onkeydown

onkeyup

All of the above

jscript.write("Sky is blue")

document.write("Sky is blue")

print("Sky is blue")

jscript.print("Sky is blue")

Display()

Prompt()

Alert()

Confirm()

element.addEventListener("click", function);

element.addEventHandler("click", function);

element.attach("click", function);

element.on("click", function);

=

==

===

!=

JavaScript interpreter processes programs written in Java.

JavaScript interpreter processes commands in a script written in JavaScript.

Java and JavaScript are almost similar

JavaScript cannot be embedded in HTML.

integers

double precision floating point

double

floating point

document.getElementByTagName()

document.getElementsByTagName()

document.querySelectorAll()

document.tagName()

onprogress

onload

onerror

oncomplete

<script href="xxx.js">

<script src="xxx.js">

<script name="xxx.js">

<script id="xxx.js">

onchange

onkeydown

oninput

onkeypress

onblur fires when an element loses focus, and onfocus fires when an element gains focus

Both events fire when the window is minimized

Both events trigger when the page is loaded

onblur fires when an element is clicked, and onfocus fires when the mouse moves over an element

CSS

Python

HTML

JavaScript

Division by zero

Missing of semicolons

Syntax error

Both A and B

Client Side

Server Side

Both A and B

None of These

keyword

function

Declaration Statement

Data type

insertBefore()

insertPrevious()

appendBefore()

addBefore()

ondblclick

onclick

onmouseclick

onhoverclick

To style HTML Pages

To perform server-side scripting operation

To execute query related to DB on server

To add interactivity to HTML Pages

if(a!=null)

if (!a)

if(a!null)

if(a!==null)

oncontextmenu

onmousedown

onrightclick

onselect

//This is a comment

<!--This is a comment-->

/* This is a comment */

Both A and C

onclickmouse

onmouseover

onmouseout

onmouseup

parseInt ()

Number()

parseFloat()

valueOf()

insertBefore()

insertAfter()

appendChild()

prependChild()

upload

load

onmouseout

onmouseover

Displays a message in an alert box

Prints output to the console

Writes data to a file

Logs an error in the browser console

Volatile variable

Mutable variable

Immutable variable

Dynamic variable

replaceNode()

replaceElement()

replaceChild()

replaceWith()

.html

.java

.js

.css

innerHTML

outerHTML

textContent

value

onerror

onexception

onwarning

onfail

stopImmediatePropagation()

preventDefault()

stopPropagation()

cancelPropagation()

onsize

onresize

onzoom

onexpand

Remove the element with the ID "myDiv" from the DOM

Remove all child elements inside the element with the ID "myDiv"

Hide the element with the ID "myDiv"

Move the element with the ID "myDiv" to a different location

To Perform Server Side Scripting Opertion

To Execute Query Related to DB on Server

To add interactivity to HTML Pages

To Style HTML Pages

round(7.25)

Math.rnd(7.25)

rnd(7.25)

Math.round(7.25)

alert("Hello World")

alertBox("Hello World")

msgBox("Hello World")

msg("Hello World")

document. write()

console.log()

innerHTML

document.getElementById()

Null type

Undefined type

Number type

All of the mentioned

document. write()

console.log()

window. alert()

innerHTML

22

4

2

syntax error

Boolean

String

Number

Function