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

1. How do you select all elements that do not have a specific class in jQuery?

:not(.classname)

:without(.classname)

:exclude(.classname)

:hasNoClass(.classname)

2. What is the purpose of the jQuery `slideToggle()` 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

3. Which jQuery method is used to retrieve the current computed width of an element, including padding and border?

.innerWidth()

.outerWidth()

.width()

.getComputedWidth()

4. 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

5. 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

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

$('[^abc]')

$('[abc*]')

$('[abc^]')

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

7. What does the jQuery `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

8. In jQuery, how do you select elements that do not have a specific attribute?

$(':not([attribute])')

$(':missing([attribute])')

$(':without([attribute])')

$(':noAttribute([attribute])')

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

.onLoad()

.ready()

.load()

.init()

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

:odd

:even

:nth-child(odd)

:nth-child(even)

11. Which jQuery method is used to get the position of an element relative to its offset parent?

.position()

.offset()

.getLocation()

.calculatePosition()

12. 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

13. 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

14. 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

15. Which jQuery method is used to remove all matched elements from the DOM?

.delete()

.removeAll()

.remove()

.discard()

16. 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()

17. 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]')

18. How can you achieve event delegation in jQuery?

Using the `.delegate()` method

Using the `.on()` method

Using the `.eventDelegation()` method

Using the `.bind()` method

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

.remove()

.empty()

.deleteChildNodes()

.discardChildren()

20. Which jQuery method is used to set the HTML content of an element?

.html()

.text()

.setContent()

.modifyHTML()

21. 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

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

.wait()

.setTimeout()

.delay()

.pause()

23. 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

24. 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

25. 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

26. How can you dynamically create elements and add them to the DOM using jQuery?

.create()

.newElement()

.addElement()

$('<element>')

27. Which jQuery method is used to hide an HTML element?

.hide()

.visible(false)

.toggle()

.remove()

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

$('.example')

#example

selectClass('example')

find('.example')

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

.animate()

.startAnimation()

.playAnimation()

.runAnimation()

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

.loadScript()

.loadJS()

.includeScript()

$.getScript()

31. What does the jQuery `toggleClass()` method do?

It toggles between hide and show for an element

It toggles between add and remove class for an element

It toggles between fade in and fade out for an element

It toggles between slide up and slide down for an element

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

.animate()

.multiAnimate()

.animateAll()

.animateProperties()

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

.attachClick()

.bind('click')

.on('click')

.clickHandler()

34. 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

35. 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

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

It detaches the selected element from the DOM

It removes all child nodes of the selected element

It detaches all matched elements from the DOM

It removes the selected element and its descendants

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

.create()

.newElement()

.addElement()

$('<element>')

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

:not(.classname)

:without(.classname)

:exclude(.classname)

:hasNoClass(.classname)

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

.load()

.onLoad()

.ready()

.initialize()

40. 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

41. 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

42. In jQuery, what does the `data()` method do?

It adds a new data attribute to an element

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

It removes a data attribute from an element

It changes the data content of an element

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

.stop()

.haltAnimations()

.endAnimations()

.pauseAnimations()

44. How can you prevent the default behavior of an event in jQuery?

.stopPropagation()

.preventDefault()

.halt()

.cancelEvent()

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

$('[data-role]')

$('.data-role')

$('#data-role')

selectByAttribute('data-role')

46. 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

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

.parent()

.getParent()

.findParent()

.closest()

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

$.ajax()

$.get()

$.post()

$.load()

49. What is the purpose of the jQuery `slideDown()` method?

It slides an element up

It slides an element down

It fades an element out

It fades an element in

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

.wait()

.delay()

.pause()

.timeout()

jQuery MCQ Test 1