Website Performance Interview Questions

  1. How can you speed up a slow website?
  2. Name some ways to optimize load times.
  3. What is critical CSS?
  4. What is critical JavaScript?
  5. Name some next-generation image formats.
  6. What is Layout Shifting?
  7. What is Time-To-Interactivity?
  8. What is Perceived-Load-Time?
  9. What is the Critical Rendering Path?
  10. What is the Main Thread?
  11. What are the different types of performance testing?
  12. What are some common problems in terms of performance a user might face — how would you remedy them?
  13. Why is web security important?
  14. What is HTTPS?
  15. What is a bundler? Why is it important and when would you use one?