CDN setup vs npm installation in Bootsrap - Practice Questions

Challenge - 5 Problems

🧠 Conceptual

intermediate

Advantages of Using CDN for Bootstrap

Which of the following is the main advantage of using a CDN to include Bootstrap in a web project?

A Enables direct modification of Bootstrap source files

B Allows offline development without internet connection

C Faster initial load times due to caching and distributed servers

D Automatically updates Bootstrap to the latest version without developer control

💡 Hint

Think about how CDNs deliver files from servers close to the user.

CDNs host files on servers worldwide, so users download files from the nearest server, speeding up load times. Offline development and source modification are not benefits of CDN usage.

❓ Architecture

intermediate

Bootstrap Installation via npm Workflow

What is the correct sequence of steps when installing Bootstrap using npm in a project?

A 3,1,2,4

B 1,3,2,4

C 3,2,1,4

D 1,2,3,4

💡 Hint

Think about project setup before installing packages.

You first initialize the project with 'npm init', then install Bootstrap, import its files, and finally use its classes in HTML.

❓ scaling

advanced

Scaling Considerations: CDN vs npm for Bootstrap in Large Teams

In a large development team working on multiple projects, which is a key scaling advantage of using npm installation of Bootstrap over CDN setup?

A Reduced local disk usage by loading Bootstrap from external servers

B Centralized version control and consistent dependency management across projects

C Automatic performance improvements from geographically distributed servers

D No need to manage Bootstrap versions manually

💡 Hint

Consider how npm helps manage versions in code repositories.

npm allows teams to lock and control Bootstrap versions in package files, ensuring consistency. CDN usage relies on external links which may change or differ.

❓ tradeoff

advanced

Tradeoff Between Load Speed and Customization

Which tradeoff best describes choosing CDN setup over npm installation for Bootstrap?

A Better security but requires manual updates

B Slower load speed but easier offline development

C More control over Bootstrap updates but increased server costs

D Faster load speed but limited ability to customize Bootstrap source code

💡 Hint

Think about what you can change when using a CDN versus local files.

CDN delivers pre-built files quickly but does not allow modifying Bootstrap source. npm installation allows customization but requires build steps.

❓ estimation

expert

Estimating Bandwidth Savings Using CDN for Bootstrap

If a website has 1 million monthly visitors and each visitor downloads 200KB of Bootstrap CSS and JS files, approximately how much bandwidth (in GB) can be saved monthly by using a CDN with 80% cache hit rate compared to hosting Bootstrap files on the origin server?

A 160 GB

B 40 GB

C 320 GB

D 400 GB

💡 Hint

Calculate total bandwidth without CDN, then multiply by cache hit rate.

Total bandwidth without CDN = 1,000,000 × 200KB = 200,000,000 KB = ~190.7 GB. With 80% cache hit, 80% of requests served by CDN, saving ~152.56 GB. Closest option is 160 GB.