What is a promise in jQuery?

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 you handle errors in an asynchronous operation in jQuery?

A). Using the done() method

B). Using the fail() method

C). Using the always() method

D). Using the then() method

How can event delegation improve performance?

A). By reducing the number of event handlers

B). By increasing the number of event handlers

C). By attaching handlers directly to elements

D). By using inline event handlers

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

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

Which jQuery method is used to chain multiple asynchronous operations?

A). done()

B). fail()

C). then()

D). always()

Which method is used to delegate an event handler in jQuery?

A). .on()

B). .delegate()

C). .bind()

D). .attach()

What is the purpose of the done() method in jQuery promises?

A). To handle failed operations

B). To handle completed operations

C). To handle pending operations

D). To create a new deferred object