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

1. 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

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

:visible

:hidden

:inView

:outOfView

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

.lastChild()

.getLastChild()

.findLastChild()

.children(':last')

.last()

4. 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

5. What is the purpose of the jQuery `fadeOut()` method?

To make an element visible

To gradually change the opacity of an element to 0

To append an element to the DOM

To hide an element using CSS

6. 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

7. What does the $ symbol represent in jQuery?

It represents a variable

It is a shorthand for the jQuery function

It signifies a global selector

It denotes a specific HTML element

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

:not(.classname)

:without(.classname)

:exclude(.classname)

:hasNoClass(.classname)

9. What does the jQuery `remove()` method do?

It removes an attribute from an element

It removes a property from an element

It removes all child nodes of an element

It removes the selected element and its descendants

10. What does the jQuery `attr()` method do?

It removes an attribute from an element

It adds a new attribute to an element

It retrieves the value of an attribute for the first element in the set of matched elements

It changes the CSS style of an element

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

:odd

:even

:nth-child(odd)

:nth-child(even)

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

.load()

.onLoad()

.ready()

.initialize()

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

.addClass()

.append()

.alterClass()

.insertClass()

14. What is the purpose of the jQuery `fadeIn()` method?

To gradually change the opacity of an element to 1

To fade an element in

To fade an element out

To toggle between fade in and fade out for an element

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

$.ajax()

$.get()

$.post()

$.load()

16. In jQuery, how do you select elements that contain a specific text?

:contains()

:textContains()

:hasText()

:text()

17. 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

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

.filter()

.find()

.select()

.search()

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

.wait()

.setTimeout()

.delay()

.pause()

20. How can you select all elements with the class 'example' in jQuery?

$('.example')

#example

selectClass('example')

find('.example')

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. How do you select all elements that have a specific attribute with a value ending with 'xyz' in jQuery?

$('[attribute$="xyz"]')

$('[attribute*=xyz]')

$('[attribute^="xyz"]')

$('[attribute~=xyz]')

23. 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

24. What is the purpose of the jQuery `serializeArray()` method?

To serialize a form into an array of objects

To serialize an array into a string

To serialize a JSON object into a string

To serialize a string into a JSON object

25. Which jQuery method is used to execute a function for each element in the set of matched elements, but in reverse order?

.forEachReverse()

.eachReverse()

.reverseEach()

.executeReverse()

26. What does the jQuery `fadeIn()` method do?

It fades an element out

It fades an element in

It slides an element up

It slides an element down

27. Which jQuery method is used to perform an animation with a callback function?

.animate()

.startAnimation()

.playAnimation()

.runAnimation()

28. Which jQuery method is used to change the text content of an element and all its descendants?

.modifyText()

.changeText()

.text()

.setText()

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

.animate()

.multiAnimate()

.animateAll()

.animateProperties()

30. How can you select all elements with an attribute value starting with 'abc' in jQuery?

$('[^abc]')

$('[abc*]')

$('[abc^]')

$('[abc^="abc"]')

31. What is the purpose of the jQuery `wrap()` method?

To add a new parent element around each selected element

To remove the parent element of each selected element

To wrap each selected element with a new element

To unwrap each selected element from its parent

32. 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

33. In jQuery, what does the `prop()` method do?

It retrieves the value of a property for the first element in the set of matched elements

It sets the value of a property for all elements in the set of matched elements

It removes a property from an element

It adds a new property to an element

34. What event handler is used to execute a function when the document is fully loaded?

.onLoad()

.ready()

.load()

.init()

35. Which jQuery method is used to stop all animations on the matched elements?

.stop()

.haltAnimations()

.endAnimations()

.pauseAnimations()

36. What does the jQuery `slideDown()` method do?

It slides an element up

It slides an element down

It fades an element out

It fades an element in

37. What is the purpose of the jQuery library?

To style HTML elements

To manipulate HTML documents

To create responsive web designs

To define CSS styles

38. How do you select all elements with an attribute value starting with 'abc' in jQuery?

$('[^abc]')

$('[abc*]')

$('[abc^]')

$('[abc^="abc"]')

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

.parent()

.getParent()

.findParent()

.closest()

40. Which event is triggered when a user clicks on an element in jQuery?

.on('hover')

.on('click')

.on('change')

.on('submit')

jQuery MCQ Test 2