Top 10 Jquery Interview Questions And Answers

What is JQuery?

• Jquery is a well-written javascript code and is not a programming language.
• Jquery seems to be more popular.

What are the features of the Jquery Library?

• HTML event methods
• CSS Manipulation
• Ajax using Jquery
• HTML/DOM manipulation
• Jquery has plugins for almost tasks

What are the advantages of Jquery?

• Very good documentation for third party library
• lightweight when compared to other frameworks
• Many plugins available for various specific needs

Is jquery is a Javascript or JSON library file?

• Jquery is said to be a single javascript file.
• Jquery is a library of the javascript file which contains features like HTML/DOM manipulation, CSS Manipulation, HTML event methods, etc.

What are the operating systems more compatible with jquery?

• Linux, windows, and mac

What are Jquery selectors?

• Jquery selectors are used to selecting and manipulate HTML Elements

Element selector:

• It selects based on the element name.  
• $("p") => Select all p elements in the page

Id selector:

• It selects elements based on the id.
• $("#id_test") => Select the element containg the id 'id_test'

class selector

• Find elements with specific class name
•  $(".class_test")

What are the methods used to provide effects in Jquery?

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

What are the events in Jquery?

• An event represents a moment when something happens.
• Examples:
  • Selecting the radio button
  • Selecting an element
  • Moving the mouse over the element
• Mouse events: click, dblclick, mouseenter, mouseleave.  
• Keyboard Events: keyup, keydown, keypress.
• Document or Window Events: unload, scroll, load, resize.
• Form Events: submit, focus, change, blur.

Is jquery a server-side scripting or client-side scripting?

• Jquery is client-side scripting.

Which are the fastest selector in Jquery?

• id and element