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

Jquery

Ques:- Why use jQuery filter() Methods?

Asked In :- Apttus Software, Atidan Technologies, confluent,

Right Answer:
The jQuery `filter()` method is used to select a subset of elements from a jQuery object based on specific criteria, allowing you to narrow down the selection to only those elements that match the given condition.

Jquery

Ques:- How does the jQuery pushStack function work?

Asked In :- Aruba Networks, FOX SOLUTIONS,

Right Answer:
The jQuery `pushStack` function is used to add a set of elements to the end of the current jQuery object stack. It allows you to maintain a chain of jQuery objects while keeping track of the previous set of elements, enabling you to return to them later using the `end()` method.

Jquery

Ques:- Why do we need to go for JQuery?

Asked In :- Indocosmo Systems, Oakland Systems, object edge,

Right Answer:
We use jQuery to simplify HTML document traversal and manipulation, handle events, create animations, and make AJAX requests more easily, all while ensuring cross-browser compatibility.

Jquery

Ques:- Will Events Are Also Copied On Clone In Jquery?

Asked In :- Harman, brain station 23 limited,

Right Answer:
No, events are not copied on clone in jQuery by default.

Jquery

Ques:- How can you get the type of arguments passed to a function?

Asked In :- MAXVY, Sonora Software, NITYA Software Solutions, snva ventures,

Right Answer:
You can use the `typeof` operator to get the type of arguments passed to a function. For example:

```javascript
function checkType(arg) {
return typeof arg;
}
```

Jquery

Ques:- How do I check if the DOM is ready?

Asked In :- Proton Expert Systems & Solutions, ThoughtClan Technologies, mobile programming llc., astegic, proxima, pangasinan state university,

Right Answer:
You can check if the DOM is ready by using the following jQuery code:

```javascript
$(document).ready(function() {
// Your code here
});
```

Alternatively, you can use the shorthand:

```javascript
$(function() {
// Your code here
});
```

Jquery

Ques:- How can you delay document.ready until a variable is set?

Asked In :- Unvired, protech solutions,

Right Answer:
You can use a combination of a variable and a function to delay `$(document).ready()`. Here’s an example:

```javascript
var isReady = false;

function checkReady() {
if (isReady) {
// Your code here
$(document).ready(function() {
// Code to execute when the document is ready
});
} else {
setTimeout(checkReady, 100); // Check again after 100ms
}
}

checkReady();

// When the variable is set to true
isReady = true; // This should be done when your condition is met
```

Jquery

Ques:- How to Use the jQuery load() Method?

Asked In :- iSteer,

Right Answer:
The jQuery `load()` method is used to load data from a server and place the returned HTML into the selected element. It can be used as follows:

```javascript
$('#elementID').load('url/to/resource');
```

You can also specify a selector to load only a portion of the response:

```javascript
$('#elementID').load('url/to/resource #selector');
```

Additionally, you can pass data to the server:

```javascript
$('#elementID').load('url/to/resource', { key: 'value' });
```

Jquery

Ques:- What were the biggest challenges of getting the jQuery 1.7 release ?

Asked In :- Pinnacleworks Infotech, Vertoz Advertising, Doyen Infosolutions Ltd, valuemomentum,

Right Answer:
The biggest challenges of getting the jQuery 1.7 release included ensuring compatibility with older browsers, improving performance, and integrating new features while maintaining a stable API.

Jquery

Ques:- Difference between javascript and jquery?

Asked In :- iNube Software Solutions, Shiash Info Solutions, Influx Solution,

Right Answer:
JavaScript is a programming language used to create dynamic content on websites, while jQuery is a fast, small JavaScript library that simplifies HTML document manipulation, event handling, and animation.

Jquery

Ques:- How do I check if an HTML element is empty using jQuery?

Asked In :- tyler technologies, charles river development, recro,

Right Answer:
You can check if an HTML element is empty using jQuery with the following code:

```javascript
if ($('.your-selector').is(':empty')) {
// The element is empty
}
```

Replace `'.your-selector'` with the actual selector for your element.

Jquery

Ques:- How To Use Ajax In Jquery?

Asked In :- Rural Sourcing, raja software labs,

Right Answer:
To use Ajax in jQuery, you can use the `$.ajax()` method. Here’s a simple example:

```javascript
$.ajax({
url: 'your-url-here',
type: 'GET', // or 'POST'
dataType: 'json', // or 'html', 'text', etc.
success: function(data) {
console.log(data); // handle the response data
},
error: function(xhr, status, error) {
console.error(error); // handle errors
}
});
```

Jquery

Ques:- Whether jQuery HTML work for both HTML and XML documents?

Asked In :-

Right Answer:
No, jQuery HTML methods work primarily with HTML documents and may not function correctly with XML documents.

Jquery

Ques:- Do we need to add jQuery file in both Master and Content page?

Asked In :- Navyug Infosolutions, Paktolus Solutions, magna infotech,

Right Answer:
No, you only need to add the jQuery file once, typically in the Master page, so that it is available to all Content pages.

Jquery

Ques:- What is jQuery UI?

Asked In :- ACL Digital, rockstar games, cd projekt red,

Right Answer:
jQuery UI is a collection of user interface interactions, effects, widgets, and themes built on top of the jQuery library, designed to help developers create highly interactive web applications.

Comments

Admin May 17, 2020

jQuery UI is a curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library that can be used to build interactive web applications.

Admin May 17, 2020

Jquery UI is an library built on top of jquery.
Jquery is an library of javascript.
Jquery UI is used to built highly interactive web applications.
Jquery UI is an open source software.

Jquery

Ques:- What is the advantage of using protocol less URL while referencing jQuery from CDNs?

Asked In :- Apexon,

Right Answer:
The advantage of using a protocol-less URL (e.g., `//ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js`) is that it allows the browser to use the same protocol (HTTP or HTTPS) as the page itself, preventing mixed content issues and ensuring that the resource loads correctly regardless of the page's protocol.

Jquery

Ques:- What is jQuery plugin and what is the advantage of using plugin?

Asked In :- octane lending,

Right Answer:
A jQuery plugin is a piece of reusable code that extends jQuery's functionality by adding new methods or features. The advantage of using plugins is that they allow developers to easily implement complex functionalities without having to write all the code from scratch, promoting code reuse and reducing development time.

Comments

Admin May 17, 2020

A plug-in is piece of code written in a standard JavaScript file. These files provide useful jQuery methods which can be used along with jQuery library methods. jQuery plugins are quite useful as its piece of code which is already written by someone and re-usable, which saves your development time.

Jquery

Ques:- Can we use protocol less URL while referencing jQuery from CDNs?

Asked In :- SpeedLabs, Pocket Pill, ThiDiff Technologies, edgeverve,

Right Answer:
Yes, you can use a protocol-less URL (e.g., //code.jquery.com/jquery-3.6.0.min.js) to reference jQuery from CDNs.

Comments

Admin May 17, 2020

Yes. Below code is completely valid.
Hide Copy Code
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

Jsp

Ques:- Define Composition.

Asked In :- Newt Global India, Netcracker Technology,

Right Answer:
Composition is a design principle in object-oriented programming where a class is made up of one or more objects from other classes, allowing for a "has-a" relationship. This means that a class can contain instances of other classes as its members, enabling code reuse and better organization.

Jsp

Ques:- How to include static files in a JSP page?

Asked In :- speridian technologies,

Right Answer:
You can include static files in a JSP page using the `<jsp:include>` tag or the HTML `<link>` and `<script>` tags. For example:

1. For including a static HTML file:
```jsp
<jsp:include page="header.html" />
```

2. For including CSS:
```html
<link rel="stylesheet" type="text/css" href="styles.css">
```

3. For including JavaScript:
```html
<script src="script.js"></script>
```

The Java skill section on takluu.com is designed for freshers, intermediate developers, and experienced professionals aiming to crack Java-based technical interviews with confidence. Java remains one of the most in-demand programming languages, and mastering it opens the door to countless opportunities in backend development, enterprise solutions, Android apps, and cloud-based platforms.

Our Java category covers everything from Core Java concepts like OOPs (Object-Oriented Programming), Data Types, Loops, and Exception Handling to Advanced Java topics including Collections Framework, Multithreading, JDBC, Servlets, JSP, Lambda Expressions, and Streams. We provide practical coding examples, real interview questions (with answers), and key concept explanations that interviewers commonly test.

Whether you’re applying for a role like Java Developer, Backend Engineer, or Full Stack Developer, this section ensures you understand the logic, syntax, and problem-solving approaches that matter in real-world interviews. You’ll also find scenario-based questions and discussions around design patterns, JVM internals, garbage collection, and performance tuning — areas often explored in senior-level interviews.

Each topic is structured to help you revise quickly and efficiently, with quizzes and mock interviews to assess your understanding. Our content is curated by experts who have worked with Java across different domains and keep the material aligned with current industry trends.

At Takluu, we believe in not just learning Java — but preparing to think in Java. Get ready to face interviews with clarity, confidence, and a deep understanding of what makes Java so powerful and reliable.

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