jQuery Quiz with Certificate: Test Your Skills and Earn Recognition for Jobs

Think you’ve mastered jQuery? Take this advanced quiz to assess your knowledge of event delegation, Deferred objects, custom events, and more. Perfect for experienced developers looking to sharpen their skills.

Attempt jQuery online test for certificate

jQuery Skill Quiz Exam

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1. Explain the difference between .detach() and .remove() in jQuery, and when you might choose one over the other.

a) .detach() removes an element from the DOM but keeps its data and event handlers, while .remove() completely removes the element and its associated data.

b) .detach() removes the element's data but keeps it in the DOM, while .remove() only removes the element from the DOM.

c) .detach() is faster than .remove() because it doesn't remove event handlers.

d) .detach() is used for hiding elements temporarily, while .remove() is used for permanent removal.

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2. What jQuery method is used to make an AJAX request?

a) getJSON()

b) ajax()

c) load()

d) post()

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3. Which jQuery method is used to change the text content of an element?

a) .text()

b) .html()

c) .val()

d) .content()

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4. What is the purpose of jQuery's .data() method?

a) To store arbitrary data associated with an element.

b) To fetch data from a remote server using AJAX.

c) To manipulate the data attributes of an element.

d) To serialize form data into a query string.

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5. How would you select all elements with the class "highlight"?

a) $(".highlight")

b) $("#highlight")

c) $("highlight")

d) $.("highlight")

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6. Which jQuery method is used to get the value of an input field?

a) .text()

b) .html()

c) .val()

d) .value()

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7. How would you use jQuery to efficiently find and remove all duplicate elements within a given set of elements?

a) Use the .unique() method to filter out duplicates.

b) Create a custom function to iterate through the elements and remove duplicates manually.

c) Use the .filter() method with a callback function to identify and remove duplicates.

d) There is no built-in jQuery method for this; you must use native JavaScript.

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8. How would you create a custom jQuery animation that smoothly transitions an element's opacity from 0 to 1 over a duration of 500 milliseconds?

a) $("#myElement").animate({ opacity: 1 }, 500);

b) $("#myElement").fadeIn(500);

c) $("#myElement").transition({ opacity: 1 }, 500);

d) $("#myElement").show(500);

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9. What is the purpose of jQuery's Deferred object?

a) To delay the execution of a function until a specified amount of time has passed.

b) To handle asynchronous operations and provide a way to manage their success or failure.

c) To create a queue of animations that will be executed in sequence.

d) To optimize the performance of event handlers.

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10. How do you remove an element from the DOM using jQuery?

a) delete()

b) empty()

c) remove()

d) clear()

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11. Which jQuery method is used to handle events like click or mouseover?

a) trigger()

b) bind()

c) on()

d) delegate()

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12. How can you access the index of the current element within a jQuery .each() loop?

a) Using the this keyword.

b) Using the second argument passed to the callback function.

c) Using the index() method.

d) It's not possible to access the index directly.

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13. What is the difference between .empty() and .remove() in jQuery?

a) .empty() removes child elements while .remove() removes the selected element and its descendants.

b) .empty() removes the selected element while .remove() removes child elements.

c) .empty() hides the selected element while .remove() deletes it from the DOM.

d) There is no difference; they do the same thing.

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14. What symbol is used as a shortcut for jQuery?

a) $

b) @

c) #

d) &

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15. What jQuery method is used to add a new class to an element?

a) addClass()

b) newClass()

c) appendClass()

d) insertClass()

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16. What are jQuery promises, and how can they be used to handle asynchronous operations in a more structured way?

a) Promises are objects that represent the eventual result of an asynchronous operation and allow you to chain callbacks for success, failure, and progress updates.

b) Promises are used to create animations with smooth transitions and easing effects.

c) Promises are used to store and retrieve data from the browser's local storage.

d) Promises are used to validate user input in forms before submitting them.

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17. What does the jQuery method .each() do?

a) Iterates over a set of matched elements and executes a function for each one.

b) Creates a new jQuery object with all matched elements.

c) Attaches a click event handler to each matched element.

d) Filters the set of matched elements based on a given condition.

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18. Which jQuery method is used to insert content at the beginning of an element?

a) .append()

b) .appendTo()

c) .prepend()

d) .prependTo()

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19. What is the purpose of the jQuery function $(document).ready()?

a) To wait for all images on the page to load before executing any JavaScript code.

b) To wait for the entire DOM structure to be fully loaded and parsed before executing jQuery code.

c) To register an event handler that will be executed when the user clicks on any element on the page.

d) To automatically resize all elements on the page to fit the current viewport size.

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20. What is the purpose of jQuery's .proxy() method?

a) To create a proxy server for making AJAX requests.

b) To ensure that a function is always executed in the context of a specific object.

c) To provide a way to cache the results of expensive function calls.

d) To handle cross-domain AJAX requests.

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FAQ of jQuery online free Test

1. How can I effectively prepare for an exam?

Answer: Effective exam preparation involves creating a study schedule, reviewing course material regularly, practicing with past exams or sample questions, seeking clarification from teachers or classmates, and managing stress through relaxation techniques or exercise.

2. What are some strategies for managing exam anxiety?

Answer: To manage exam anxiety, try deep breathing exercises, mindfulness techniques, positive self-talk, visualization, and getting enough sleep. It's also important to be well-prepared and avoid last-minute cramming.

3. How can I improve my time management during an exam?

Answer: Before the exam, familiarize yourself with the format and time allocation for each section. During the exam, quickly scan the entire paper to prioritize questions, allocate time for each question based on its difficulty and point value, and keep an eye on the clock to ensure you stay on track.

4. What should I avoid doing during an exam?

Answer: Avoid cheating, leaving your answers blank, and spending too much time on a single question.

5. When will I get my exam results?

Answer: This is online free jQuery test and you can get result instantly. Yes! You can download certificate instantly.