Python Job Interview Questions | Decorators - in Hindi

If you’ve ever wondered what decorators really do in Python or struggled to explain them in interviews, this video will clear it all up. In this complete guide, I’ll take you from the basics of decorators to advanced, real-world patterns used in professional codebases and FAANG interviews. We’ll go step by step — building decorators from scratch, understanding how they work under the hood, and applying them to real coding challenges. 🧠 What You’ll Learn 1. What exactly is a Decorator, and how Python treats functions as first-class objects 2. How to write your own decorators from scratch 3. Handling parameters using *args and **kwargs 4. Preserving metadata with @wraps 5. Timer Decorator – measure performance like a pro 6. Factory Decorator – parameterized decorators 7. Exception Handling Decorator – write clean, safe code 8. Understanding Closures – the secret behind decorators 9. Multiple Decorators – how they stack and execute 10. Class-Based Decorator & Decorating Class Methods 11. Memoization – boost performance with caching 12. Retry API Decorator – exponential backoff, jitter, and circuit breaker 13. Summary – recap of concepts & interview tips 💬 Why You Should Watch This This isn’t just another tutorial — it’s interview-focused learning. You’ll learn how to explain decorators confidently, use them in real-world scenarios, and solve tricky coding challenges that interviewers love to ask. By the end of this video, you’ll not only understand how decorators work, but also why they’re powerful — and how to use them to write clean, reusable, and professional Python code. 👇 If you’re preparing for: Python technical interviews Backend developer roles FAANG or top-tier company interviews This video will give you both the coding depth and the clarity of explanation you need to stand out. ⭐ Subscribe for more advanced Python and interview prep content — explained in a simple, real-world way. 00:00:00 Introduction 00:00:57 What is a Decorator 00:02:27 Function as First Class Object 00:05:03 Writing First Decorator 00:08:01 Using @wraps 00:09:41 Passing Parameters (*args, **kwargs) to a Decorated Function 00:13:21 Return value from Decorated Function 00:14:45 Timer - Decorator 00:16:10 Factory Decorator 00:20:10 Exception Handling - Decorator 00:22:06 Understanding Closure 00:24:15 Using Multiple Decorators 00:26:21 Class-Based Decorator 00:29:15 Decorating Class Methods 00:29:55 Memoization 00:33:04 Retry API with Exp. Backoff, Jitter, and Circuit Breaker 00:41:02 Summary Python Function - https://youtu.be/PFrwibZfYyI Music by: Bensound.com/free-music-for-videos License code: VO4NZ1BKSGUQOKFU