Q
How can you delay the loading of images to improve performance?

Answer & Solution

Answer: Option B
Solution:
Lazy load plugins delay loading of images until they are needed, improving initial load performance.
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()

How can you minimize DOM manipulation reflows?

A). Use inline styles

B). Use CSS classes

C). Batch DOM changes

D). Avoid using jQuery

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 advantage of using native JavaScript methods over jQuery methods?

A). Better readability

B). Better browser compatibility

C). Improved performance

D). Easier to use

What is event delegation?

A). Binding events to each child element

B). Binding events to a parent element

C). Using inline event handlers

D). Using anonymous functions

Why should you use the latest version of jQuery?

A). To improve compatibility with older browsers

B). To access new features

C). To improve performance and fix bugs

D). To reduce file size

Which method detaches elements from the DOM in jQuery?

A). .remove()

B). .hide()

C). .detach()

D). .append()

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

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

Which of the following methods improves performance by reducing the number of reflows?

A). .html()

B). .text()

C). .css()

D). .detach()