Q
How can you optimize the performance of event handlers?

Answer & Solution

Answer: Option C
Solution:
Event delegation optimizes performance by reducing the number of event handlers needed.
Related Questions on Average

How can you batch DOM changes to improve performance?

A). Use .addClass() and .removeClass()

B). Use document fragments

C). Use inline styles

D). Use .hide() and .show()

Which method detaches elements from the DOM in jQuery?

A). .remove()

B). .hide()

C). .detach()

D). .append()

How can you cache AJAX responses in jQuery?

A). By setting cache: false

B). By setting cache: true

C). By using the .promise() method

D). By using the .then() method

What is the purpose of caching jQuery selectors?

A). To reduce memory usage

B). To improve readability

C). To improve performance

D). To reduce code length

What is the best practice for handling frequent events like scroll or resize?

A). Use .off() to remove handlers

B). Use inline event handlers

C). Use debounce or throttle

D). Use .bind() method

What jQuery method is used for event delegation?

A). .on()

B). .off()

C). .click()

D). .bind()

What is the effect of using the .append() method inside a loop without caching?

A). Improved readability

B). Improved performance

C). Increased DOM manipulations

D). Reduced memory usage

How can you optimize AJAX requests for better performance?

A). Use synchronous requests

B). Use POST method for all requests

C). Minimize data transferred

D). Avoid using AJAX

What is the advantage of using native JavaScript methods over jQuery methods?

A). Better readability

B). Better browser compatibility

C). Improved performance

D). Easier to use

How can you minimize DOM manipulation reflows?

A). Use inline styles

B). Use CSS classes

C). Batch DOM changes

D). Avoid using jQuery