JavaScript Industry-Specific Questions

1. What are the key differences between `var`, `let`, and `const` in JavaScript, and when would you use each one?

2. Explain the concept of "hoisting" in JavaScript and how it affects variable and function declarations.

3. Can you elaborate on the event loop in JavaScript and how it handles asynchronous operations?

4. What are Promises in JavaScript, and how do they enhance the way we handle asynchronous code compared to traditional callbacks?

5. Describe the prototype chain in JavaScript. How does inheritance work in JavaScript?

6. What are some of the performance optimization techniques you would use when developing JavaScript applications?

7. Explain the differences between the `for...in` and `for...of` loops in JavaScript. When would you use each approach?

8. Discuss how to manage state in a complex JavaScript application, including the use of libraries like Redux or Context API.

9. Can you explain how closures work in JavaScript, and provide a relevant use case for them?

10. What is the significance of the `this` keyword in JavaScript, and how does its behavior differ in various contexts (e.g., regular functions, arrow functions, and methods)?