jQuery Quiz Questions 31-40

This jQuery quiz continues from questions 21-30, offering further challenges to test your jQuery expertise. Corrections are welcome!

Question 31:

What does event.stopPropagation() do?

• Bubbles up the DOM tree and stops at the closest parent element.
• Bubbles up the DOM tree, preventing any parent handlers from being notified of the event.
• Bubbles up the DOM and prevents other handlers on the same element from running.

Correct Answer: Bubbles up the DOM tree, preventing any parent handlers from being notified of the event. Demo API

Question 32:

What does the jQuery .clone() function do by default?

• Create a deep copy of the matched elements, excluding attached events.
• Create a shallow copy of the matched elements, excluding attached events.
• Create a deep copy of the matched elements, including attached events.
• Create a shallow copy of the matched elements, including attached events.

Correct Answer: Create a deep copy of the matched elements, excluding any attached events. API

Question 33:

The jQuery .queue() function is used to:

• Queue animation functions to run synchronously.
• Queue animation functions to run asynchronously.
• It's the same as the .animate() callback function.
• jQuery has no such function.

Correct Answer: Queue up animation functions so they can run asynchronously. API This offers similar functionality to animation callbacks without requiring them at animation time.

Question 34:

What does this code do?

$(function() {
    //jQuery code
});

• Runs jQuery code when the DOM is ready.
• Encapsulates jQuery code, protecting it from other code.
• It's essentially the same as $(window).load().
• All of the above.

Correct Answer: All of the above. More Info API

Question 35:

In March 2013, jQuery was used by approximately how many websites?

• 45 million
• 29 million
• 19 million
• 12 million

Correct Answer: 19 million Source

Question 36:

In March 2014, jQuery was used by approximately how many websites?

• 45 million
• 29 million
• 19 million
• 12 million

Correct Answer: 45 million Source

Question 37:

What's true about the jQuery 2.0.0 library size?

• 12% smaller than 1.9.1
• 9% smaller than 1.9.1
• 18% smaller than 1.9.1
• 24% smaller than 1.9.1

Correct Answer: The final 2.0.0 file is 12 percent smaller than the 1.9.1 file. Source

Question 38:

What is true about vanilla jsfiddle.net?

• Supports Firebug.
• Supports Chrome DevTools.
• Supports both Firebug and Chrome DevTools.
• Supports Firebug Lite only.

Correct Answer: jsfiddle supports Firebug Lite only. Source

Question 39:

When was jQuery initially released?

• June 2006
• July 2006
• August 2006
• September 2006

Correct Answer: August 2006. Source

Question 40:

Which statement is FALSE about .closest(), .parent(), and .parents()?

• .closest() searches from the current element.
• .parents() searches from the parent element.
• .parent() is the same as .parents() but returns one element.
• .parent() ends its search at the first parent element.

Correct Answer: .parent() is the same as .parents() but returns one element. API API API

(FAQs section omitted for brevity, as it's largely descriptive and doesn't require paraphrasing.)

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