What is jQuery primarily used for?

• HTML/CSS styling
• JavaScript library for DOM manipulation
• Database queries
• Server-side programming

Which symbol is used to access jQuery?

• %
• $
• #
• &

How do you select an element with id “main” in jQuery?

• $("main")
• $("#main")
• $(.main)
• $main

Which method is used to hide an element?

• hide()
• displayNone()
• invisible()
• none()

What does $(document).ready() ensure?

• Page is fully loaded including images
• HTML is loaded and DOM is ready
• CSS is applied
• JavaScript is disabled

Which method is used to find descendants of an element?

• find()
• child()
• descend()
• getChildren()

What does closest() do in jQuery?

• Finds nearest sibling
• Finds nearest ancestor matching selector
• Finds nearest child
• Finds nearest element by index

Which method is best for event delegation?

• bind()
• delegate()
• on()
• trigger()

What does preventDefault() do?

• Stops event bubbling
• Prevents default browser action
• Stops script execution
• Cancels DOM rendering

Which method stops event bubbling?

• stopPropagation()
• preventDefault()
• stopEvent()
• haltEvent()

Which method is the most customizable AJAX method in jQuery?

• $.get()
• $.ajax()
• $.post()
• $.load()

What does the dataType option in $.ajax() specify?

• Request type
• Response format expected
• Timeout duration
• Encoding

Which callback runs when an AJAX request fails?

• done()
• fail()
• always()
• error()

Which callback runs regardless of AJAX success or failure?

• done()
• fail()
• always()
• complete()

What is $.Deferred() used for?

• Event binding
• DOM manipulation
• Managing asynchronous operations
• CSS styling