Supreme Jquery Test - 77+ MCQs: jQuery test: Evaluate Your Knowledge with jQuery Questions and Answers

1. In jQuery, what does the `siblings()` method do?

It selects all siblings of the matched elements

It selects the first sibling of the matched elements

It selects the last sibling of the matched elements

It selects only the immediate siblings of the matched elements

2. In jQuery, how do you select elements that are visible on the screen?

:visible

:hidden

:inView

:outOfView

3. In jQuery, what does the `slideUp()` method do?

To make an element visible

To gradually change the opacity of an element to 0

To slide an element up

To hide an element using CSS

4. In jQuery, what does the `.empty()` method do?

It removes all matched elements from the DOM

It removes all child nodes of the selected element

It detaches the selected element from the DOM

It empties the content of the selected element

5. Which jQuery method is used to add a click event handler to an element?

.attachClick()

.bind('click')

.on('click')

.clickHandler()

6. How do you select all elements with the attribute 'data-role' in jQuery?

$('[data-role]')

$('.data-role')

$('#data-role')

selectByAttribute('data-role')

7. Which jQuery method is used to filter elements based on a selector?

.filter()

.find()

.select()

.search()

8. In jQuery, how do you select all odd-indexed elements?

:odd

:even

:nth-child(odd)

:nth-child(even)

9. What is the purpose of the jQuery `fadeToggle()` method?

To toggle between hide and show for an element

To toggle between add and remove class for an element

To toggle between fade in and fade out for an element

To toggle between slide up and slide down for an element

10. Which method is used in jQuery to perform an asynchronous HTTP request?

$.ajax()

$.get()

$.post()

$.load()

11. Which jQuery method is used to create a new element?

.create()

.newElement()

.addElement()

$('<element>')

12. How do you select the parent element of a specific child element in jQuery?

.parent()

.getParent()

.findParent()

.closest()

13. How can you delay the execution of a function in jQuery?

.wait()

.setTimeout()

.delay()

.pause()

14. In jQuery, what does the `.replaceWith()` method do?

It replaces the selected element with new content

It replaces all matched elements with new content

It replaces the parent element of each selected element with new content

It replaces the content of the selected element with new content

15. Which jQuery method is used to animate multiple properties simultaneously?

.animate()

.multiAnimate()

.animateAll()

.animateProperties()

16. Which jQuery method is used to attach a function to be executed when the DOM is fully loaded?

.load()

.onLoad()

.ready()

.initialize()

17. What does the jQuery `off()` method do?

It turns off all events for the matched elements

It turns off a specific event for the matched elements

It removes all matched elements from the DOM

It removes a specific element from the DOM

18. In jQuery, what does the `.hasClass()` method do?

It checks if the element has a specific class

It adds a new class to the element

It removes a class from the element

It toggles between add and remove class for the element

19. Which jQuery method is used to remove all child nodes of an element?

.remove()

.empty()

.deleteChildNodes()

.discardChildren()

20. In jQuery, what does the `.unwrap()` method do?

It unwraps the selected element from its parent

It removes the parent element of each selected element

It unwraps all matched elements from their parents

It removes all child nodes of the selected element

21. In jQuery, what does the `serialize()` method do?

It serializes a form into a query string

It serializes a JSON object into a string

It serializes a string into a JSON object

It serializes an array into a string

22. In jQuery, what is the purpose of the `Deferred` object?

It represents a sequence of asynchronous operations

It delays the execution of functions in the queue

It dynamically creates elements and adds them to the DOM

It animates multiple properties simultaneously

23. Which jQuery method is used to delay the execution of functions in the queue?

.wait()

.delay()

.pause()

.timeout()

24. How do you use the `noConflict` mode in jQuery?

By including jQuery twice in the same document

By removing conflicting jQuery libraries

By using `jQuery.noConflict()` and assigning the result to a variable

By disabling conflicting plugins

25. How can you dynamically load a JavaScript file using jQuery?

.loadScript()

.loadJS()

.includeScript()

$.getScript()

26. What is the purpose of the jQuery `slideUp()` method?

To make an element visible

To gradually change the opacity of an element to 0

To slide an element up

To hide an element using CSS

27. What is the purpose of the jQuery `promise()` method?

To add a new parent element around each selected element

To retrieve the current computed width of an element, including padding and border

To represent a promise that is resolved or rejected based on the completion of a set of asynchronous operations

To filter elements based on a selector

28. How can you select elements that do not have a specific class in jQuery?

:not(.classname)

:without(.classname)

:exclude(.classname)

:hasNoClass(.classname)

29. What is the purpose of the jQuery `map()` method?

To add elements to an array based on a mapping function

To modify the elements of an array based on a mapping function

To remove elements from an array based on a mapping function

To find the index of an element in an array

30. Which jQuery method is used to add a class to an element?

.addClass()

.append()

.alterClass()

.insertClass()

jQuery MCQ Test 3