What does 'return this' achieve in a jQuery plugin?

What is a common use of jQuery plugins?

A). Enhancing user interfaces

B). Connecting to databases

C). Server-side scripting

D). File handling

What is the primary purpose of jQuery plugins?

A). Extend jQuery's prototype object

B). Simplify HTML documents

C). Manage CSS styles

D). Enhance server-side scripting

What is the purpose of the self-invoking function in jQuery plugins?

A). Encapsulation

B). Event binding

C). Animation

D). Ajax handling

How can you extend an existing jQuery plugin with new methods?

A). $.fn.pluginName.newMethod = function()

B). $.pluginName.extend()

C). $.fn.extend(pluginName, newMethod)

D). $.extend(pluginName, newMethod)

How do you ensure a jQuery plugin supports method chaining?

A). Return this

B). Use $.fn.chain

C). Call the chain() method

D). Use return false

Which jQuery method is used to merge two or more objects?

A). $.extend()

B). $.merge()

C). $.combine()

D). $.concat()

What does the $.each() method do in jQuery?

A). Iterates over elements

B). Filters elements

C). Binds events

D). Animates elements

Which jQuery method is used to apply a plugin to selected elements?

A). $(selector).pluginName()

B). $(selector).usePlugin()

C). $(selector).applyPlugin()

D). $(selector).newPlugin()

How can you pass options to a jQuery plugin?

A). As an object

B). As a string

C). As an array

D). As a number

In a jQuery plugin, how do you select the current element?

A). this

B). $(this)

C). element

D). $(element)