What is the main purpose of language objects in JavaScript?

To perform general-purpose tasks like computations and data handling.

What is the DOM primarily used for?

Manipulating the structure and content of a web page.

Which of these is a feature of the BOM (Browser Object Model)?

Gives access to the browser's properties like navigator and screen.

Which of the following statements is true about language objects?

They include objects like Math and String.

Choose the correct JavaScript syntax to change the content of the following HTML code.

document.getElementById(“geek”).innerHTML=”I am a Geek”;

What is the difference between language objects and model objects?

Language objects: General computations.Model objects: Browser interactions.

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Introduction to JS

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Questions 17

Answers

1
What is the main purpose of language objects in JavaScript?
To interact with the DOM.
To create browser pop-ups.
To perform general-purpose tasks like computations and data handling.
To manipulate browser-specific elements.
2
The external JavaScript file must contain <script> tag.
False
True
3
What is the output of this code?console.log(typeof null);
“number”
“undefined”
“null”
“object”
4
The output of this script
“5*6”
30
5*6
“30”
5
Which of the following are legal?
document.h1
document.body.h1
document.body.style
document.body
6
What is the DOM primarily used for?
Parsing JSON data.
Manipulating the structure and content of a web page.
Performing mathematical operations.
Managing server-side data.
7
Referring to the code in the previous question, what kind of thing is myLi referring to?
a CSS rule
an HTML li element in the tree
the string wizard
a string
8
Which of these is a feature of the BOM (Browser Object Model)?
Gives access to the browser's properties like navigator and screen.
Represents and manipulates the content of a web page.
Allows you to parse JSON data.
Provides utility methods like parseFloat() and parseInt().
9
Which of the following statements is true about language objects?
They include objects like Math and String.
They are specific to web browsers.
They allow direct interaction with web page elements.
They are created by the browser environment.
10
Which object provides access to the browser's current URL?
navigator
document
History
location
11
Choose the correct JavaScript syntax to change the content of the following HTML code.
document.getElementById(“geek”).innerHTML=I am a Geek;
document.getId(“geek”)=”I am a Geek”;
document.getElement(“geek”).innerHTML=”I am a Geek”;
document.getElementById(“geek”).innerHTML=”I am a Geek”;
12
Predict the output of the following JavaScript code.
88
16
Compilation Error
Run Time Error
13
What is the difference between language objects and model objects?
There is no difference between the two.
Language objects are part of the DOM, while model objects are not.
Language objects are browser-specific, while model objects are universal.
Language objects: General computations.Model objects: Browser interactions.
14
Which of the following is an example of a model object?
Array
Dte
Math
window
15
How do you create a function in JavaScript?
function:myFunction()
function = myFunction()
function myFunction()
create myFunction()
16
Given the following Javascript snippet, what will the alert box say?
dragon
castle
wizard
dungeon
17
What will this code return?console.log(0.1+ 0.2 === 0.3);
NaN
True
False
TypeError

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