html5 css3 javascript interview questions and answers pdf

Html5 Css3 Javascript Interview Questions And Answers Pdf

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It is a simple yet advanced design language aimed to simplify the process of making web pages more presentable. We will discuss a set of most interviewer asked CSS3 interview questions further here for your acknowledgment. Here in this article, we will be listing frequently asked CSS3 interview questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies. Users can set multiple effects to a portion separated by commas.

Web Development, HTML, CSS, JavaScript Interview Question and Answer

What is the difference between Canvas and SVG graphics? What are web workers and why do we need them? How can we add and remove data from local storage? What is the difference between local storage and cookies? So how do we refresh the application cache of the browser?

I am ASP. So below are 40 important questions which would help you brush up your knowledge on HTML 5. These questions are not silver bullet to get a job but yes they are helpful when you want to quickly brush up the topic. Courtesy: - www. SGML Standard generalized markup language is a standard which tells how to specify document markup. It has everything from animations, videos, rich GUI etc.

A typical web page has headers, footers, navigation, central area and side bars. Output element is needed when you need calculation from two inputs to be summarized in to a label. For instance you have two textboxes see the below figure and you want to add numbers from these textboxes and send them to a label. SVG stands for scalable vector graphics. This makes it lightweight and renders faster. Below is how the code of HTML 5. You can see the SVG tag which encloses the polygon tag for displaying the star image.

To draw on the canvas area we need to first get reference of the context section. Below is the code for canvas section. Now once you have access to the context object we can start drawing on the context.

Note: - If you see the previous two questions both canvas and SVG can draw graphics on the browser. So in this question interviewer wants to know when will you use what. Selectors help to select an element to which you want to apply a style. CSS column layout helps you to divide your text in to columns.

For example consider the below magazine news which is one big text but we need to divide the same in to 3 columns with a border in between. To specify number of columns we need to us column-count. Border: - This defines the maximum area in which the element will be contained. We can make the border visible, invisible, define height and width etc.

For instance below is a simple CSS code which defines a box with border , padding and margin values. Now if we apply the above CSS to a DIV tag as shown in the below code , your output would be as shown in the figure below. Here the interviewer is expecting you to answer one of two text effects by CSS.

Below are two effects which are worth noting. Now this method execution is synchronous. In other words the complete browser will wait until the for loop completes. This can further lead to browser getting freezed and unresponsive with an error message as shown in the screen below. So if we can move this heavy for loop in a JavaScript file and run it asynchronously that means the browser does need to wait for the loop then we can have a more responsive browser.

Many times we would like to store information about the user locally in the computer. So the user would like you to store this information locally and when the internet comes back.

He would like to get that information and send it to the server for storage. Local storage does not have a life time it will stay until either the user clear it from the browser or you remove it using JavaScript code. Session storage is same like local storage but the data is valid for a session. In simple words the data is deleted as soon as you close the browser. Local storage data persists forever but session storage is valid until the browser is open, as soon as the browser closes the session variable resets.

WebSQL is a structured relational database at the client browser side. The specification is based around SQLite. The first argument is the name of the database, the next is the version, then a simple textual title and finally the size of the database.

One of the most demanded things by end user is offline browsing. Below is the structure of the manifest file One the cache manifest file is created the next thing is to provide the link of the manifest file in the HTML page as shown below.

When the above file runs first time it gets added in the browser application cache and in case server goes down the page is served from the application cache. Fallback in application cache helps you to specify the file which will displayed if the server is not reachable. What kind of questions are asked to.

This is a sample. To implement column layout we need to specify the following:- How many columns we want to divide the text in to?

Padding: - This defines the spacing between border and element. Margin: - This defines the spacing between border and any neighboring elements. In other words any shape drawn by using SVG can be remembered and manipulated and browser can render it again. Canvas is like draw and forget. Once something is drawn you cannot access that pixel and manipulate it. Here we cannot associate event handlers with drawing objects as we do not have reference of them. Data accessible both at client side and server side.

Cookie data is sent to the server side with every request. Data is accessible only at the local browser side. Cookies have expiration attached to it.

There is no expiration data. Either the end user needs to delete it from the browser or programmatically using JavaScript we need to remove the same.

HTML5 and CSS3 Interview Questions & Answers for UI Development.

In this section you can find interview questions and answers for basic of web development tools. It is the fifth and current major version of the HTML standard. Semantics: allowing you to describe more precisely what your content is. Connectivity: allowing you to communicate with the server in new and innovative ways. Offline and storage: allowing webpages to store data on the client-side locally and operate offline more efficiently. Multimedia: making video and audio first-class citizens in the Open Web. Performance and integration: providing greater speed optimization and better usage of computer hardware.


Canvas is a element of HTML5 which uses JavaScript to draw graphics on a web page. A canvas is a rectangular area. Each and every pixel of it can be controlled​.


CSS3 interview questions and Answers

SVG images can be created and edited with any text editor SVG images can be searched, indexed, scripted, and compressed SVG images are scalable SVG images can be printed with high quality at any resolution SVG images are zoomable and the image can be zoomed without degradation. You can attach JavaScript event handlers for an element. In SVG, each drawn shape is remembered as an object. If attributes of an SVG object are changed, the browser can automatically re-render the shape.

Prepare well for your job interview by using these questions and answers. Defines content tangentially related to the content surrounding it, such as related reading links and glossaries, which may or not be nested within an article element.

CSS3 interview questions and Answers

It is a language of World Wide Web. It is a standard text formatting language which is used to create and display pages on the Web. It makes the text more interactive and dynamic. It can turn text into images, tables, links.

Give the video a width of pixels by pixels. Provide the user with controls. Extensions to the JavaScript API such as geolocation and drag-and-drop as well for storage and caching. Several new semantic tags were also added to complement the structural logic of modern web applications. Web workers at long last bring multi-threading to JavaScript.


Sencha and Twitter/Bootstrap are both HTML development frameworks that integrate HTML5, CSS3, and JavaScript. The major difference is that.


3 comments

Milena L.

HTML doesn't provide support for running J.S. within the web browser. HTML5 allows JavaScript to run in the background using Web Workers. 7.

REPLY

Steve H.

In technical terms, HTML5 defines behaviours and properties of content on a web page by implementing a markup-based pattern to it.

REPLY

Knowibhangui

What is the difference between Canvas and SVG graphics?

REPLY

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