Q
How can event delegation improve performance?

Answer & Solution

Answer: Option A
Solution:
Event delegation improves performance by reducing the number of event handlers, as a single handler on a parent element can manage events for multiple child elements.
Related Questions on Average

How can you ensure that a callback runs only once, even if the promise is resolved multiple times?

A). Using the done() method

B). Using the fail() method

C). Using the once() method

D). Using the then() method

How does event delegation handle dynamically added elements?

A). By re-attaching event handlers

B). By attaching event handlers to the parent element

C). By using the .bind() method

D). By using the .on() method with a selector

What is a deferred object in jQuery?

A). An object that stores HTML elements

B). An object that represents a task that will finish in the future

C). An object that handles CSS styles

D). An object that manages event listeners

How do you attach multiple callbacks to a jQuery promise?

A). Using multiple then() methods

B). Using multiple done() methods

C). Using multiple fail() methods

D). Using multiple always() methods

Which method is used to define custom validation rules in jQuery?

A). validateRule()

B). addRule()

C). addMethod()

D). validateMethod()

How can developers handle multiple asynchronous operations concurrently in jQuery?

A). Using the done() method

B). Using the when() method

C). Using the fail() method

D). Using the always() method

What does the fail() method do in jQuery promises?

A). Attaches a callback for when the promise is rejected

B). Attaches a callback for when the promise is resolved

C). Attaches a callback for when the promise is pending

D). Attaches a callback for when the promise is created

Which method allows you to specify multiple callbacks for different outcomes of a promise in jQuery?

A). done()

B). fail()

C). always()

D). then()

Which jQuery method is used to chain multiple asynchronous operations?

A). done()

B). fail()

C). then()

D). always()

How can you create a promise from a deferred object in jQuery?

A). Using the promise() method

B). Using the then() method

C). Using the done() method

D). Using the fail() method