Ajax Interview Questions
Following are some of the most frequently asked Ajax interview questions in the interview, here are the answers for them.
What is Ajax?
This technique is used to make internet faster and user friendly. It is not a programming language.
What are Ajax applications?
Browser based applications and platform independent applications are used by Ajax.
How many types of triggers are present in update panel?
There are two types of triggers used in update panel:
PostBackTrigger – This works as full postback and it cannot work asynchronously
AsyncPostBackTrigger – Partial post back asynchronously
What are all the controls of Ajax?
Following are the controls of Ajax:
What is the name of the DLL that contains Ajax control tool kit?
Ajaxcontroltoolkit.dll is the DLL used for Ajax control tool kit and it can be downloaded from the internet. It can be added in the tool box or copied directly in the bin folder.
What are disadvantage of Ajax?
It does not crawl to search Engine.
Describe how to handle concurrent AJAX requests?
JavaScipt Closures can be used for handling concurrent requests.
What is Asynchronous in Ajax?
We can set the Asynchronous value as true OR false.
Ajax request execute independently, Its response can come earlier than other request which is execute later .
Ajax request does not execute independently, Its response can comes when earlier request finished.
AJAX sends a request to the server and doesn’t wait for the response. It doesn’t reload the page so consumes less bandwidth.
What are the different ready states of a request in AJAX?
There are 5 ready states of a request in AJAX.
0 means UNOPENED
1 means OPENED
2 means HEADERS_RECEIVED
3 means LOADING
4 means DONE
What does XMLHttpRequest?
sends data in the background
updates data without reloading the page
What are the real web applications of AJAX currently running in the market?
What is JSON in AJAX?
What are the properties of XMLHttpRequest?
The important properties of XMLHttpRequest object are given below.
What are the technologies used by AJAX?
HTML/XHTML and CSS
What do the different readystates in XMLHttpRequest?
Following are different stats(0-4) of ready state in XMLHttpRequest
0 Ajax Request not initialized
1 Ajax Request’s server connection established
2 Ajax Request received
3 Ajax Request processing
4 request finished and response is ready.
What js library are available to use the Ajax?
Following are few JS library which are used for Ajax
What are advantage of AJax?
Its faster as it load only required content.
More user friendly.
One page application possible due to Ajax.
Reduce the loading of page.
What is XMLHttpRequest?
It is used to send HTTP/HTTPS requests to a web server and load the server’s response into the script.