13.03 Performance And Page Load Management - Quiz

Check your understanding

1. What is the primary benefit of implementing server-side caching for database queries?

   • Reduces network latency between server and database { data-correct }
   • Eliminates the need for database indexes
   • Increases database storage capacity
   • Prevents SQL injection attacks

2. Which HTTP header is most important for enabling browser caching of static assets?

   • Content-Type
   • Cache-Control { data-correct }
   • Content-Length
   • Accept-Encoding

3. What compression algorithm is most commonly used for web content compression?

   • ZIP
   • RAR
   • GZIP { data-correct }
   • BZIP2

4. What is the main advantage of asset bundling in web applications?

   • Reduces the number of HTTP requests { data-correct }
   • Decreases file sizes through compression
   • Improves code readability
   • Enables better version control

5. Which technique loads non-critical resources after the initial page render?

   • Asset bundling
   • Lazy loading { data-correct }
   • Compression
   • Caching

6. What is the purpose of a Content Delivery Network (CDN) in performance optimization?

   • To provide database backup services
   • To distribute static assets geographically closer to users { data-correct }
   • To compress dynamic content
   • To implement user authentication

7. Which of the following is an effective cache invalidation strategy?

   • Never invalidating cached data
   • Invalidating all cache entries every hour
   • Using cache keys that include version numbers or timestamps { data-correct }
   • Only caching data for 1 second

8. What does “above-the-fold” content refer to in performance optimization?

   • Content that is compressed
   • Content visible without scrolling when the page loads { data-correct }
   • Content stored in the browser cache
   • Content served from a CDN

9. Which performance monitoring technique helps identify slow-running code sections?

   • Cache hit rate monitoring
   • Code profiling { data-correct }
   • Bandwidth testing
   • Error logging

10. What is the benefit of progressive enhancement in web performance?

    • It reduces server costs
    • It ensures core functionality loads first, with enhancements added later { data-correct }
    • It eliminates the need for caching
    • It automatically compresses all assets