jQuery MCQs (Chapterwise Multiple Choice Questions)

Which of the following is NOT a custom jQuery form selector?

:checkbox

:form

:selected

:enabled

Answer & Explanation

Correct Answer: :form

Note: This Question is unanswered, help us to find answer for this one

Which of the following will get the first column of all tables using jQuery?

$('table.tblItemTemplate first-child');

$('table.tblItemTemplate tr:first-child');

$('table.tblItemTemplate td:first-child');

$('tabletblItemTemplate td:first-child');

Answer & Explanation

Correct Answer: $('table.tblItemTemplate td:first-child');

Note: This Question is unanswered, help us to find answer for this one

Though jQuery offers visual effects, it is considered a best practice to use CSS to set up different states triggered by classes, where it makes sense. What's the easiest way to enable and disable a class bounce on an element with the ID dialog?

$('#dialog').classToggle('bounce')

$('#dialog.bounce').removeClass().addClass()

$('#dialog').addOrRemoveClass('bounce')

$('#dialog').toggleClass('bounce')

Answer & Explanation

Correct Answer: $('#dialog').toggleClass('bounce')

Note: This Question is unanswered, help us to find answer for this one

What is a particular performance concern when dealing with event handlers, and how can you cope with it?

Finding which element an event occurred on is expensive. Assign most events to document.body and use .is() to act on the element of interest.

Some events, such as mousemove and scroll, happen a lot on a typical page. Debounce or throttle their handlers to make sure the handlers are not called more than you actually need.

Listening for an event that does not exist can create serious memory leaks. Be careful to spell event names correctly to avoid consuming too much memory.

DOM elements with an ID wil fire events more efficiently than with classes. Always use IDs instead of classes where possible.

Answer & Explanation

Correct Answer: Some events, such as mousemove and scroll, happen a lot on a typical page. Debounce or throttle their handlers to make sure the handlers are not called more than you actually need.

Note: This Question is unanswered, help us to find answer for this one

Which protocol should you use when referencing a CDN script in a web page?

Always use https so that it works with secure pages

Let the browser figure out the protocol by using //

Always use http

None of the above

Answer & Explanation

Correct Answer: Let the browser figure out the protocol by using //

Note: This Question is unanswered, help us to find answer for this one

True or False: .position() accepts an optional argument as a selector

true

false

Answer & Explanation

Correct Answer: false

Note: This Question is unanswered, help us to find answer for this one

Which will get the CURRENT COORDINATES of the first element in the set of matched elements, RELATIVE TO THE DOCUMENT?

pos()

coord()

offset()

position()

Answer & Explanation

Correct Answer: offset()

Note: This Question is unanswered, help us to find answer for this one

What index value does the :nth-child() selector starts with?

0

1

2

Answer & Explanation

Correct Answer: 1

Note: This Question is unanswered, help us to find answer for this one

Which of the following selectors is NOT equivalent to the others?

:first

:nth-child(1)

:first-child

Answer & Explanation

Correct Answer: :first

Note: This Question is unanswered, help us to find answer for this one

How do you execute code 2 seconds after the page was loaded.

window.setTimeout(function(){ // some code }, 2);

window.delayed(function(){ // some code }, 2000);

window.timeOut(function(){ // some code }, 2);

window.setTimeout(function(){ // some code }, 2000);

Answer & Explanation

Correct Answer: window.setTimeout(function(){ // some code }, 2000);

Note: This Question is unanswered, help us to find answer for this one

JQuery Quick Quiz

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Correct Answers: 0/10

Start Practicing with our MCQs given below.

JQuery MCQ

JQuery Quick Quiz

Which of the following is NOT a custom jQuery form selector?

Which of the following will get the first column of all tables using jQuery?

Though jQuery offers visual effects, it is considered a best practice to use CSS to set up different states triggered by classes, where it makes sense. What's the easiest way to enable and disable a class bounce on an element with the ID dialog?

What is a particular performance concern when dealing with event handlers, and how can you cope with it?

Which protocol should you use when referencing a CDN script in a web page?

True or False: .position() accepts an optional argument as a selector

Which will get the CURRENT COORDINATES of the first element in the set of matched elements, RELATIVE TO THE DOCUMENT?

What index value does the :nth-child() selector starts with?

Which of the following selectors is NOT equivalent to the others?

How do you execute code 2 seconds after the page was loaded.