Quiz: Ajax-Programming Test Questions

What's AJAX?

Asynchronous JavaScript And XML is referred to as AJAX. In a nutshell, it involves contacting servers via the XMLHttpRequest object. JSON, XML, HTML, and text files are just a few forms it can send and receive data in. The most enticing aspect of AJAX is its "asynchronous" nature, which allows it to exchange data with the server and update the page without requiring a refresh.

Ajax outlines a technique for starting client-server communication without refreshing the page. It offers a method to allow for partial page updates. From the viewpoint of a web page user, it translates to improved interaction with a web application, giving the user greater environment control, similar to that of a desktop application.

How Does AJAX Work?

JavaScript and XML work together to provide asynchronous updating by using something called an XMLHttpRequest object. When a user accesses an AJAX-enabled website, a specified event takes place (the user loads the page, clicks a button, fills out a form, etc.) The data is then transferred in an XML format between a web browser (the application used to view the website) and a web server (the program or hardware where a website's data is stored) thanks to JavaScript's creation of an XMLHttpRequest object. The XMLHttpRequest object requests updated page data from the web server, which processes the request and sends the browser a response that was made on the server.