70 jQuery Interview Questions to Ace Your Next Interview

• DOM Manipulation − jQuery makes it easier to select DOM elements, traverse them and modify their content by using a cross-browser open source selector engine called Sizzle.
• Event Handling − jQuery offers a useful way to capture a wide variety of events, for example, a user clicking on a link, without the need to clutter the HTML code itself with event handlers.
• AJAX Support − Allows you to develop a responsive and feature-rich site using AJAX technology.
• Animations − jQuery comes with plenty of built-in animation effects that you can use throughout their websites.
• Lightweight −  jQuery is a very lightweight library. It is about 19KB in size (Minified and gzipped).
• Cross Browser Support − jQuery has cross-browser support which works well in IE 6.0+, FF 2.0+, Safari 3.0+, Chrome and Opera 9.0+.
• Latest Technology − Supports CSS3 selectors and basic XPath syntax.

• It serves as a JavaScript enhancement.
• It makes coding more simple, clear and reusable.
• Easy removal of writing more complex conditions and loops.

• Apply CSS static or dynamic.
• Calling functions on events.
• Manipulation purposes.
• Mainly for Animation effects.

• Show()
• Hide()
• Toggle()
• FadeIn() and
• <FadeOut()

• Local copy inside a script tag.
• Remote copy of jQuery.com.
• Remote copy of Ajax API.
• Embedded script using client script object.

1. CSS Selector
2. XPath Selector
3. Custom Selector

• Element ID
• CSS Name
• Tag Name
• DOM hierarchy

• HTML/DOM manipulation
• CSS manipulation
• HTML event methods
• effects and animations
• AJAX
• utilities

var emp = {
    name: "Zara",
    age: 10
};

1. Debugger Keyword- Add the debugger to the line from where you have to start debugging and then run a Visual Studio in Debug mode with your F5 function key.
2. Insert a breakpoint after attaching the process.

1. Microsoft – Load jQuery from Ajax CDN
2. Google – Load jQuery from Google Libraries API

var x = [];
var y = [1, 2, 3, 4, 5];

var sample = $.noConflict()

• URL – Need to specify the URL to send the request.
• Type – Specifies type of request (Get or Post).
• Data – Specifies data to be sent to the server.
• Cache – Whether the browser should cache the requested page.