1. What is the concept of prototypal inheritance in JavaScript?
2. How do you create a custom constructor function in JavaScript?
3. Explain the use of the bind() method in JavaScript.
4. How does the call() method differ from the apply() method?
5. What are closures, and how can they be used to create private variables?
6. Explain the concept of the module pattern in JavaScript.
7. What is a factory function, and how is it used?
8. How do you implement the revealing module pattern in JavaScript?
9. What is the difference between shallow copy and deep copy in JavaScript?
10. How do you clone an object using Object.assign()?
11. Explain how to use the spread operator for object cloning.
12. What is the purpose of the Object.create() method?
13. How can you implement a debounce function in JavaScript?
14. What is throttling, and how is it different from debouncing?
15. How do you create a simple promise in JavaScript?
16. What is the purpose of the Promise.resolve() method?
17. How do you implement chaining with promises in JavaScript?
18. What are async functions, and how do they improve asynchronous code?
19. Explain the concept of error handling in asynchronous functions.
20. How do you handle multiple asynchronous operations using Promise.all()?
21. What is the async iterator, and how is it different from a regular iterator?
22. How do you create a custom event in JavaScript?
23. Explain the concept of event delegation and its advantages.
24. How do you prevent default behavior in an event handler?
25. What is the difference between stopPropagation() and stopImmediatePropagation()?
26. How do you implement a simple event bus in JavaScript?
27. What is the purpose of the setImmediate() function?
28. Explain how to use the fetch() API for making HTTP requests.
29. How do you handle HTTP response statuses in the fetch() API?
30. What are the differences between XMLHttpRequest and the fetch() API?
31. How do you handle CORS (Cross-Origin Resource Sharing) issues in JavaScript?
32. What is the Service Worker API, and how is it used in web applications?
33. Explain the concept of IndexedDB and its use cases.
34. How do you store and retrieve data using IndexedDB?
35. What is the difference between localStorage and IndexedDB?
36. How do you implement a simple caching mechanism using JavaScript?
37. What are generators in JavaScript, and how do they work?
38. Explain the use of the yield keyword in generator functions.
39. How do you create an infinite generator in JavaScript?
40. What is the for...of loop, and how does it differ from for...in?