#Performance

Design a system of concurrent progress bars that handle multiple tasks running in parallel. Implement features for starting, pausing, and resetting actions, ensuring independent states for each progress bar. Use simulated asynchronous tasks like setInterval or Promises.

Design the frontend for an Airbnb search listings page. Describe the component hierarchy including filters, list, map, and pagination. Where does the state live? Discuss how you would handle loading and error states, pagination vs infinite scroll, caching search results, and performance optimizations for large result lists.

Describe how you would optimize rendering for a list of 10,000+ items in a React application to ensure smooth user experience.

Tell me about a time you had to manage someone's performance. What challenges did you face and how did you address them?

Explain the concepts of throttling and debouncing in JavaScript. Provide examples of their usage in web applications.