Ajax interview questions and Answers

It uses the following technologies:-

• HTML & CSS: Used for presentation
• DOM: Used for data interaction and dynamic display
• JSON or XML: Used for carrying data from and to server
• XMLHttpRequest: Used for asynchronous communication between server and client.
• JSP or ASP: Used for server-side
• JavaScript: Used to bring all the above technologies together.

Here are few most asked AJAX interview questions by global interviewers.

Developers use JSON to pass the updates made in AJAX between the client and the server. We can take websites with live updates can be considered as an example of AJAX with JSON. It directly assigns data to the elements present in DOM of the web pages.

The cache: false is used by developers to prevent all future AJAX requests from being cached, regardless of which jQuery method they use. We can use $.ajaxSetup({cache:false}); to apply the technique for all AJAX functions.

In AJAX, Synchronous Request ( async: false ) is used to stop JavaScript processing the program until a result has been obtained from the server side. In some situations, the Synchronous script is mandatory.

If you are looking out for best AJAX interview questions for experienced, follow this set.

The primary use of AJAX is to allow the client side of an application to communicate with the server side of the application effectively. It’s the first technique available in which the client side of a web application to communicate directly with the server.

It’s an asynchronous request initialized by the browser that doesn’t directly result in a page transition. In an AJAX call, AJAX communicates with the server using the XMLHttpRequest object.

There are 2 types of post back in AJAX.

• Asynchronous - It does not block the client.
• Synchronous - It blocks the client until the operation completes.