Question 1

What is a Manifest file?

Accepted Answer

A Manifest file is a simple text file that tells the browser what to cache and what not to cache There are three sections of a Manifest file: i) CACHE MANIFEST - Files listed here are cached after they are downloaded for the first time ii) NETWORK - Files listed here require a connection to the server, and are never cached iii) FALLBACK - Files listed here specify fallback pages if a page is inaccessible

Question 2

What is a Web Worker?

Accepted Answer

- A web worker is a JavaScript which runs in the background It exists in external files - It is independent of other scripts and does not affect the performance of the page - Web workers are usually used for CPU intensive tasks

Question 3

Which JavaScript objects are not accessible to web worker?

Accepted Answer

Following JavaScript objects are not accessible to web worker: - The window object - The document object - The parent object

Question 4

What are the new attributes provided in HTML5 for "form" tag ?

Accepted Answer

The new attributes provided in HTML5 for are: a) autocomplete – It specifies if a form or input field should have autocomplete as on or off – If autocomplete is on, the browser is able to fill the values based on the values filled by the user earlier – autocomplete works for following input types: text, search, url, tel, email, password, datepickers, range, and color b) novalidate - This is a boolean attribute - When present, it signifies that the form-data should not be validated when submitted

Question 5

Can HTML 5 get the geographical position of a user?

Accepted Answer

- Yes, HTML 5 can get the location of a user with the use of Geolocation API - Use getCurrentPosition() method to get the user’s current position

Question 6

HTML 5 provides drag and drop facility. How do you make an image draggable?

Accepted Answer

To make an image draggable, the draggable attribute is set to true:

Question 7

Which method is used to draw an image on the canvas?

Accepted Answer

drawImage(image,x,y) method is used to draw an image on the canvas

Question 8

What are meta tags used for?

Accepted Answer

To store information usually relevant to browsers and search engines

Question 9

What is the difference between XML and HTML?

Accepted Answer

XML is used for exchanging data, HTML is not

Question 10

What does an HTML tag do?

Accepted Answer

It specifies formatting and layout instructions for your web page

Question 11

DOM stands for

Accepted Answer

Document object model

Question 12

What is the advantage of using frames?

Accepted Answer

- Frames make it easier to navigate through a site - The links that appear in the frame can appear through out the site

Question 13

What is a better way to design the layout of a web page – a table tag or div?

Accepted Answer

- The better way to design the layout of the webpage is by using the tag - The tag is used to present the data in tabular format

Question 14

Explain Non Breaking space in HTML.

Accepted Answer

When we add many spaces in the content then HTML remove all space except one space this is Non Breaking Space To overcome this problem we use “ ” Suppose we want to add 3 space between two words then we have to use &nbp three time

Question 15

Explain marquee tag.

Accepted Answer

Marquee tag: Marquee tag is used when we want that some text or content move in the web page whether horizontally or vertically Syntax of Marquee tag: content you want to move Attribute of Marquee tag are: bgcolor, direction, height, width, vspace etc

Question 16

What is the Use of SPAN in HTML and give one example?

Accepted Answer

The tag is used to group inline-elements in a document The tag provides no visual change by itself The tag provides a way to add a hook to a part of a text or a part of a document EX : My Car Color is blue

Question 17

What is difference between HTML and HTML5?

Accepted Answer

The differences between HTML and HTML5 are: - Document of HTML is very large as compare to the HTML5 - Audio and Video tags are not present in HTML whereas HTML5 contains audio and video tags - Vector technology is not integral part of HTML whereas HTML5 Vector technology is the integral part of it - HTML supported by all old browsers whereas HTML5 is supported by new browser - In HTML web sockets are not available whereas in HTML5 Full duplex communication channel is present

Question 18

How to insert Javascript in HTML?

Accepted Answer

We can insert JavaScript in HTML using Example:

Question 19

What is the importance of Doctype in HTML?

Accepted Answer

Doctype tag is not a HTML tag, it is just an instruction that is passed to the web browser to check for the information that is being provided by the markup language in which the page is written Doctype is sometimes referred as Document type definition (DTD) that describes some rules that has to be followed while writing the markup language so to make the web browser understand the language and the content correctly Doctype is very important to be placed in the beginning of the HTML and before the tag to allow easy rendering of the pages that are used

Question 20

Differentiate different types of Doctypes from one another.

Accepted Answer

Doctype helps the web browser to correctly render the web pages There are different types of Doctype that are available and they are as follows: => Strict Doctype: it consists of all the HTML elements and it is also known as DTD (Document type definition) but it doesn't include the presentational and deprecated elements ie font, center, etc Framesets related elements are also not allowed in this For example: => Transitional Doctype: it consists of all the HTML elements and attributes It is also known as DTD (Document type definition) It includes the presentational and deprecated elements ie font, center, etc Framesets related elements are also not allowed in this For example: => Frameset Doctype: it consists of all the HTML elements and attributes It is also known as DTD (Document type definition) It includes the presentational and deprecated elements ie font, center, etc Framesets related elements are also allowed in this For example:

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