Web Programming Web Performance and Optimization 2

Question 1

What is code splitting in the context of web applications?

Accepted Answer

Breaking a JavaScript bundle into smaller chunks loaded on demand

Answer

Dividing code into frontend and backend

Answer

Separating HTML, CSS, and JavaScript into different files

Answer

Splitting code across multiple developers

Question 2

What does the HTTP/2 protocol improve over HTTP/1.1?

Accepted Answer

Multiplexing — allowing multiple requests over a single connection simultaneously

Answer

Stronger encryption

Answer

Larger maximum file sizes

Answer

Improved cookie security

Question 3

What is the purpose of image optimization in web performance?

Accepted Answer

To reduce image file sizes while maintaining acceptable visual quality, improving load times

Answer

To improve image copyright protection

Answer

To apply CSS filters to images

Answer

To convert images to base64 encoding

Question 4

What is a service worker in web development?

Accepted Answer

A script that runs in the browser background, enabling offline functionality and push notifications

Answer

A background process on the web server

Answer

A database worker thread

Answer

A CSS animation process

Question 5

What does the 'render-blocking' term mean in web performance?

Accepted Answer

Resources like CSS or JavaScript that must load before the browser can render the page

Answer

JavaScript that prevents server rendering

Answer

Backend processes that block HTTP responses

Answer

CSS animations that block user input

Question 6

What is the benefit of using WebP image format over JPEG?

Accepted Answer

WebP typically provides smaller file sizes with similar or better quality for both lossy and lossless compression

Answer

WebP supports animated images only

Answer

WebP has wider browser support than JPEG

Answer

WebP supports higher resolution than JPEG