Mastering Web Performance Optimization

What is a cache strategy and why is it important?

• A cache strategy is only relevant for database management.

• A cache strategy is important because it optimizes data access speed and resource utilization, leading to improved application performance.

• A cache strategy is used to store data permanently.

• A cache strategy is a method for data encryption.

Name three common cache strategies used in web performance.

• Database indexing

• Browser caching, CDN caching, Server-side caching

• Data encryption

• Load balancing

What is the purpose of CSS optimization in web development?

• To reduce the number of CSS rules for easier maintenance.

• To add more colors and fonts to the website design.

• The purpose of CSS optimization in web development is to enhance performance and loading speed.

• To increase the size of CSS files for better organization.

List two techniques for optimizing CSS files.

• Using CSS preprocessors

• Adding comments in CSS

• Minification and combining CSS files.

• Using inline styles

What are the key principles of responsive design?

• Key principles of responsive design include fluid grids, flexible images, and media queries.

• CSS animations

• Fixed images

• Static layouts

How does media queries contribute to responsive design?

• Media queries are irrelevant for modern web development.

• Media queries are used to create animations in web design.

• Media queries enable responsive design by applying styles based on device characteristics, allowing layouts to adapt to different screen sizes.

• Media queries only affect text size on mobile devices.

What is a service worker and what role does it play in web performance?

• A service worker is a type of web server that hosts websites.

• A service worker is a tool for optimizing server-side code.

• A service worker is a plugin that enhances browser security.

• A service worker is a background script that improves web performance by caching resources and enabling offline functionality.

Explain how service workers can improve offline capabilities.

• Service workers only work when the network is available.

• Service workers improve offline capabilities by increasing server response times.

• Service workers can only cache images, not other resources.

• Service workers improve offline capabilities by caching resources and serving them when the network is unavailable.

What are the main features of HTTP/2 that enhance performance?

• Content delivery networks, image optimization, and lazy loading.

• Asynchronous loading, client-side caching, and SSL termination.

• Persistent connections, cookie management, and DNS prefetching.

• Multiplexing, header compression, and server push.

How does multiplexing in HTTP/2 improve loading times?

• Multiplexing in HTTP/2 limits requests to one at a time, increasing loading times.

• Multiplexing in HTTP/2 improves loading times by allowing multiple simultaneous requests and responses over a single connection, reducing latency and enabling parallel resource loading.

• HTTP/2 multiplexing requires multiple connections for each resource, slowing down loading.

• Multiplexing in HTTP/2 only works for images, not for other types of resources.