Ajax

Data availability using ajax: I was going for an interview where I had clear my first round and in the second round they had given me a form in this which lots of functionality with ajax validation of data in the database. So had stat my coding test and stuck at a point where I have to do this so I had searched about this and find the best solution.

Ajax- Asynchronous JavaScript and XML: Sometime we have a requirement to update a particuler portion of a page not whole page so we required AJAX. Conventional web application used iframe for a webpage in which we call a different-2 web page in a single pages. A page will send a request to a server for updating a page and wait for its response.