JQuery Interview Questions

Jquery

jQuery is a JavaScript Library. jQuery greatly simplifies JavaScript programming. jQuery is easy to learn.

1: What is jQuery?

Answer: jQuery is a feature-rich JavaScript library that makes HTML document traversal and manipulation, event handling, animation, and Ajax much simpler and faster. jQuery has an easy-to-use API that works across many browsers. UI related functions can be written with minimal lines of code using jQuery.

2: What is the difference between JavaScript and jQuery?

Answer: JavaScript is an interpreted programming language whereas jQuery is a library with APIs built for JavaScript. jQuery simplifies the use of the JavaScript language.

3: What are the effects methods used in jQuery?

Answer: jQuery enables us to add effects on a web page. jQuery effects can be categorized into fading, sliding, hiding/showing and animation effects. jQuery provides many methods for effects on a web page

These are the effects methods used in jQuery:

  • show() – It displays or shows the selected elements.
  • hide() – It hides the matched or selected elements.
  • toggle() – It shows or hides the matched elements. In other words, it toggles between the hide() and show() methods.
  • fadeIn() – It shows the matched elements by fading it to opaque. In other words, it fades in the selected elements.
  • fadeOut() – It shows the matched elements by fading it to transparent. In other words, it fades out the selected elements.

4: What is jQuery Ajax?

Answer: AJAX is an acronym standing for Asynchronous JavaScript and XML and this technology helps us to load data and exchange data with the server without a browser page refresh. JQuery is a great tool which provides a rich set of AJAX methods to develop next-generation web applications.

5: What does ajax() method do?

Answer: This method sends an asynchronous http request to the server.

6: What does the ajax method load() do?

Answer: The load() method sends an http request to load the html or text content from the server and adds them to the DOM element(s).

7: What are the jQuery Ajax Events?

Answer: The jQuery library also includes events that will be fired based on the state of the Ajax request, these are called Ajax events.

8: What does the jQuery Ajax event method ajaxComplete() do ?

Answer: Whenever an Ajax request completes, jQuery triggers the ajaxComplete event. Any and all handlers that have been registered with the .ajaxComplete() method are executed at this time.

9: Can a jQuery library be used for server scripting?

Answer: jQuery is designed with the functionality for client-side scripting. jQuery is not compatible with server-side scripting.

10: What are Events in jQuery?

Answer: Responding to user actions on a webpage is called events. jQuery provides simple methods for attaching event handlers to selections. When an event occurs, the provided function is executed.

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