Ajax Interview Questions (10+ Sample Answers)

Ajax Interview Question (At Least10 With Short Sample Answers)

Ajax is a framework for web development approaches that use various client-side web technology to construct asynchronous web programs. Ajax allows web applications to transmit & retrieve information to a server asynchronously while interrupting the current page’s appearance and behavior. Ajax is a collection of technologies more than a singular technology. For mark-up as well as style data, HTML & CSS could be used together. The web page could then be changed using JavaScript to dynamically show the new data and enable the client to connect with it.  We will present Ajax Interview Question here.

We can use AJAX to modify parts of our web apps asynchronously. Whenever the Ajax connection is over, JavaScript changes the page’s HTML source. Without mandating a page refresh, the modifications are implemented instantly. Ajax interactions could be used to check form submissions applying server-side logic as the user enters the input, gets information from the system, and dynamically changes data on a website.

Ajax is a group of technologies that enable a website to submit asynchronous demands to a server. This means that a website does not need to be completely reloaded to retrieve or submit data to the web server, allowing for speedier interactions.

  • For interactive content displaying, Ajax includes XHTML for data, CSS for display, Document Object Model, and JavaScript.
  • Synchronous requests are used by traditional web applications to send and receive data to & from the server. It means that once users submit a form, users will be redirected to a fresh page with updated data from the webserver.
  • Once you submit a form using AJAX, JavaScript sends a request to the web server, interprets the response, and updates the present screen. In the truest sense, the users would have no idea that anything was sent to the server at all.
  • Whereas XML is the most typical format for collecting server data, every format, even plain text, could be utilized.

How does Ajax work?

  • When a user does an action on a web page, such as clicking a button.
  • The HTTPRequest object is set up with the query parameter and transmitted to the website through XMLHTTPRequest and over the web.
  • An asynchronous connection to the network is made with XMLHTTPRequest.
  • A servlet and an activity listener execute the client’s request on the web server, such as data fetched from the databases. In the form of an XML document, the answer is constructed using the required information.
  • An XMLHTTPRequest object collects input, processes it, and modifies the HTML DOM to show the page with the updated data given by the customer while using the push callback feature.

When Should You Use Ajax?

Ajax could be utilized in any online project where little data are saved and received from the network without having to reload the full page. Data quality on submit actions is a nice illustration of this. Another illustration is changing the contents in the drop-down list-box dependent on some other inputs, like state & college lists. Each college list box should regenerate with only universities & colleges within this state after the customer chooses a state.

Another good illustration is when a user wants to save and receive session settings on the server depending on the user’s choice, such as an item’s height, width, or location. Changing the width might trigger a callback to a server, which would create the current width’s session parameter. The server can then alter the object’s width depending on this session parameter every time the page is reloaded. Instead, the object will revert to its original width.

Ajax’s Important Features

  • It improves the speed of a website.
  • Unaffected by server technology.
  • Improve the web page’s speed.
  • Live data linking is supported.
  • Data Views control is supported.
  • Client-side template loading is supported.
  • Customer interfaces that are both rich & responsive
  • Server resources are used more sparingly.
  • No need to refresh the entire webpage after pressing the submit button.
  • And no requirement to reload the entire page; just the section that needs to be refreshed is reloaded.
  • Create web applications that are faster as well as more engaging by using ajax.

Ajax Interview Question With Sample Answers

  • Q1. What exactly is Ajax?

Asynchronous Javascript & XML are the abbreviations for Ajax. This is a new methodology for making web systems better, quicker, and thus more engaging apps. Ajax involves a web server as well as the asynchronous movement of data in between Browsers. This technology is being used to make the internet more user-friendly & speedier. It is not a software program.

  • Q2: What are Ajax applications, and what do they do?

Ajax uses browser-based apps & separate platform apps

  • Q3: How many triggers seem to be available in the update panel?

The updated panel contains two sorts of triggers:

  • PostBackTrigger – operates as a complete postback and does not operate asynchronously.
  • AsyncPostBackTrigger — Asynchronous partial postback.
  • Q4: What is the DLL name which includes the toolkit Ajax control?

Ajaxcontroltoolkits.dll are the DLLs that you can obtain through the Internet using Ajax control toolkits. You can insert this into the toolbox and manually copy it in your bin directory.

  • Q5: What is the panel update?

A server controller is an updating panel intended for the web page’s section. When using the update panel, Scripting Manager should be used. The user cannot manage external controls by using the update panel.

  • Q6: What is JSON and how does it relate to Ajax?

The full form of JSON is JavaScript Object Notation. JSON is a secure, trustworthy, user- and machine-friendly JavaScript data transmission standard.

  • Q7: Does Ajax say it is a tool for technology and an architectural theme

The technology & architecture are supported by Ajax.

  • Q8: How do you debug AJAX apps?

Debugging is done with two tools:

  • Fiddler for Internet Explorer
  • Mozilla’s Firebug.
  • Q9: What do you mean by Script Manager?

Script Manager is a tool for managing AJAX client-side scripts. Because AJAX relies on JavaScript, it functions as a middleman. A Script Manager is available on every website that supports AJAX to allow AJAX frameworks.

  • Q10: Can you set up Javascript session data sets?

No, any consulting variables cannot be determined immediately from javascript because they are only a generation of the customer. Although asynchronous, you might use AJAX.

  • Q11: Can Ajax work in a different language?

Definitely, Java is an excellent AJAX suit! Users can develop an AJAX consumers page and receive AJAX requests using Java Commercial Version Servers, modifying server countries for AJAX consumers, and joining AJAX users for their business. The dimension update of JavaServer is indeed a premium suit to delineate as well as utilize AJAX additives.

  • Q12: In AJAX, what does it mean to make the synchronous request?

AJAX uses synchronous as well as asynchronous requests depending on the website server’s demand priorities. They should be set up carefully so that the server responds to the customers’ requirements. While requesting to continue with the first stage of the script processing, the synchronous request pauses for the site’s response, which is important in a quick reaction mechanism. To keep the server accessible, this must be presented regularly. Asynchronous request technique should be utilized whenever it is necessary or inevitable.

  • Q13: What are the drawbacks of using Ajax?

Users of AJAX face few drawbacks:

  • Cannot browse between different page states using the forward as well as back buttons.
  • Users are unable to bookmark specific states in this application.
  • Users who do not have JavaScript support and have deactivated JavaScript will be unable to access the AJAX features provided by developers. Main search engines do not index AJAX-loaded data
  • Q14: What is the best way to terminate the Ajax request?

When a customer takes an action that initiates an Ajax request, an existing request is terminated. It could be demonstrated using auto-complete capability for a search box which allows customers to be assisted with similar search phrases depending on their present input by sending such an AJAX request every time they enter a button in the search field.  

  • Q15: What is the update panel and how does it work?

A server control that updates the part of the web page is utilized to refresh the update panel. While using the update panel, make sure to be using Script Manager. The client could not use external controls with the update panel.


In this article, we learned how to use AJAX to asynchronously transfer data across the internet, changing the page constantly without having to reload the full content. AJAX is a set of robust technology for developing versatile web pages, and it aids us in creating more responsive websites by sending just the type of data necessary to the servers. AJAX is becoming more famous as a scripting language based on JavaScript that offers several benefits. We have given all the relevant interview questions, which the interviewers mostly ask. 

Also read Web API Interview Questions and Sample Answers

Ajax Interview Questions (10+ Sample Answers)

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