Ajax Interview Questions and Answers in 2025 (100+ Q&A)

Ajax

Ques:- what are difference between server-side ajax framework and client-side ajax framework?

Asked In :-

Right Answer:
Server-side AJAX frameworks handle requests on the server, processing data and returning responses to the client, while client-side AJAX frameworks manage requests directly in the browser, allowing for dynamic updates without reloading the page.

Ajax

Ques:- Define json?

Asked In :-

Right Answer:
JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It uses a text format that is completely language independent but uses conventions that are familiar to programmers of the C family of languages. JSON is often used to transmit data between a server and a web application.

Ajax

Ques:- Why do we use the xmlhttprequest object in ajax?

Asked In :- MAXVY,

Right Answer:
We use the XMLHttpRequest object in Ajax to send and receive data asynchronously from a server without refreshing the entire web page.

Ajax

Ques:- Explain what is polling in ajax?

Asked In :-

Right Answer:
Polling in AJAX refers to the technique of repeatedly sending requests to the server at regular intervals to check for updates or new data. This allows the client to stay updated with the latest information without requiring the user to refresh the page.

Ajax

Ques:- How we can send data to server using ajax?

Asked In :-

Right Answer:
You can send data to the server using AJAX by creating an XMLHttpRequest object or using the Fetch API. For example, with XMLHttpRequest:

```javascript
var xhr = new XMLHttpRequest();
xhr.open("POST", "your-server-url", true);
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.send("key1=value1&key2=value2");
```

Or with Fetch API:

```javascript
fetch("your-server-url", {
method: "POST",
headers: {
"Content-Type": "application/json"
},
body: JSON.stringify({ key1: "value1", key2: "value2" })
});
```

Ajax

Ques:- Should I consider ajax?

Asked In :- MAXVY, vtiger,

Right Answer:
Yes, you should consider Ajax if you want to create a more dynamic and responsive web application that can update parts of a page without reloading the entire page.

Ajax

Ques:- Describe the formats and protocols used by ajax?

Asked In :-

Right Answer:
AJAX primarily uses the following formats and protocols:

1. **Protocols**:
- HTTP (Hypertext Transfer Protocol)
- HTTPS (HTTP Secure)

2. **Data Formats**:
- JSON (JavaScript Object Notation)
- XML (eXtensible Markup Language)
- HTML (Hypertext Markup Language)
- Plain Text

These formats and protocols facilitate asynchronous communication between the client and server.

Ajax

Ques:- Which are limitations of ajax?

Asked In :-

Right Answer:
1. Limited browser support for older versions.
2. SEO challenges, as content may not be indexed properly.
3. Increased complexity in debugging and error handling.
4. Potential for security issues, such as cross-site scripting (XSS).
5. Dependency on JavaScript being enabled in the user's browser.
6. Can lead to performance issues if not implemented efficiently.

Ajax

Ques:- Describe the accordionextender control?

Asked In :-

Right Answer:
The AccordionExtender control is a component in ASP.NET AJAX that allows you to create a collapsible panel interface. It enables multiple sections to be expanded or collapsed, displaying one section at a time while hiding others, enhancing user experience by organizing content in a compact format.

Ajax

Ques:- How to cancel the current request in ajax?

Asked In :-

Right Answer:
To cancel the current AJAX request, you can use the `abort()` method on the XMLHttpRequest object. For example:

```javascript
var xhr = new XMLHttpRequest();
xhr.open('GET', 'your-url', true);
xhr.send();

// To cancel the request
xhr.abort();
```

Ajax

Ques:- What are the differences between ajax and javascript?

Asked In :- vtiger,

Right Answer:
AJAX (Asynchronous JavaScript and XML) is a technique that allows web pages to update asynchronously by exchanging data with a server in the background, while JavaScript is a programming language used to create dynamic content on web pages. AJAX uses JavaScript to send and receive data without refreshing the page, but JavaScript can be used independently for various tasks beyond AJAX.

Ajax

Ques:- Describe how to handle concurrent ajax requests?

Asked In :-

Right Answer:
To handle concurrent AJAX requests, you can:

1. Use `Promise.all()` to manage multiple requests simultaneously and wait for all to complete.
2. Implement request cancellation using `AbortController` to cancel ongoing requests if needed.
3. Manage the order of requests by chaining them with `.then()` if the order is important.
4. Use a queue system to limit the number of concurrent requests if necessary, ensuring that only a set number of requests are processed at a time.

Ajax

Ques:- Explain fetch api in javascript?

Asked In :-

Right Answer:
The Fetch API in JavaScript is a modern interface for making network requests. It allows you to easily send and receive data from a server using promises. You can use it to fetch resources like JSON, text, or images by calling `fetch(url)`, which returns a promise that resolves to the response of the request. You can then use methods like `.json()` or `.text()` to process the response data.

Ajax

Ques:- What is xmlhttprequest object in ajax?

Asked In :-

Right Answer:
The `XMLHttpRequest` object in Ajax is a JavaScript object that allows web pages to send and receive data asynchronously from a server without reloading the page. It enables the fetching of data in various formats, such as XML, JSON, or plain text.

Ajax

Ques:- What is synchronous request in ajax?

Asked In :-

Right Answer:
A synchronous request in Ajax is a type of request where the client waits for the server to respond before continuing to execute any further code. This means that the user cannot interact with the web page until the request is completed.

Ajax

Ques:- What does json stand for?

Asked In :- WorldQuant,

Right Answer:
JSON stands for JavaScript Object Notation.

Ajax

Ques:- Is ajax considered a programming language?

Asked In :-

Right Answer:
No, Ajax is not a programming language; it is a technique for creating asynchronous web applications using JavaScript and other technologies.

Ajax

Ques:- What is asynchronous request in ajax?

Asked In :-

Right Answer:
An asynchronous request in Ajax allows a web page to send and receive data from a server without refreshing the entire page, enabling a smoother user experience by allowing other tasks to continue while waiting for the server's response.

Ajax

Ques:- Why do you use ajax?

Asked In :-

Right Answer:
Ajax is used to create asynchronous web applications that can send and receive data from the server without refreshing the entire page, resulting in a smoother and faster user experience.

Ajax

Ques:- How to handle multiple async ajax requests?

Asked In :-

Right Answer:
You can handle multiple async AJAX requests by using `Promise.all()` to execute them concurrently and wait for all of them to complete. Each AJAX request should return a promise, and `Promise.all()` will resolve when all promises are fulfilled or reject if any promise is rejected. Here's an example:

```javascript
const request1 = fetch('url1');
const request2 = fetch('url2');
const request3 = fetch('url3');

Promise.all([request1, request2, request3])
.then(responses => {
// Handle responses
return Promise.all(responses.map(response => response.json()));
})
.then(data => {
// Use the data from all requests
})
.catch(error => {
// Handle error
});
```

The AJAX category on takluu.com is designed for aspiring web developers and frontend engineers who want to build seamless, responsive user experiences. As one of the most crucial technologies in modern web development, AJAX (Asynchronous JavaScript and XML) allows web pages to send and receive data from servers without reloading the entire page—making it a core topic in interviews.

This section covers the fundamentals of AJAX, including how it works, how to make XMLHttpRequest or use fetch() for server communication, and real-world scenarios such as form validation, dynamic content loading, and live search. We also explore how AJAX integrates with frameworks like jQuery, React, Angular, and Vanilla JavaScript.

Sample questions you’ll find here include:

“What is AJAX and how does it improve UX?”
“Difference between synchronous and asynchronous requests?”
“How to handle errors in AJAX calls?”
“Explain the role of Promises and async/await with AJAX.”
“How can you prevent caching issues in AJAX requests?”

Each topic is explained in a simple, human-friendly language with practical examples and diagrams to help you visualize the flow of requests. This category is curated based on real interview questions asked at top tech companies and startups.

So if you’re preparing for a frontend, full-stack, or JavaScript developer role—Takluu’s AJAX section is your go-to guide to crack every technical round with clarity and confidence.

Questions in: Ajax

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