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✅ *Top Python Basics Interview Q&A* 📚 1️⃣ *What is Python?* Python is a high-level, interpreted programming language known for its readability and versatility. It supports multiple paradigms: procedural, object-oriented, and functional. 2️⃣ *Difference between Python 2 and Python 3?* Python 3 is the future — it has better Unicode support, print() as a function, and improved syntax. Python 2 is outdated and no longer maintained. 3️⃣ *What are variables and data types in Python?* Variables store data. Python has dynamic typing. Common types: int, float, str, bool, list, tuple, dict, set 4️⃣ *What are Python operators?* Operators perform operations on variables: – Arithmetic: +, -, *, / – Comparison: ==, !=, >, < – Logical: and, or, not – Assignment: =, +=, -= 5️⃣ *What is type conversion and casting?* Changing data types manually or automatically. Example: int("5") converts string to integer. 6️⃣ *What are if-else statements?* Used for decision-making.

if x> 0:
    print("Positive")
else:
    print("Non-positive")

7️⃣ *What is a loop in Python?* Used to repeat code. – for loop: iterates over sequences – while loop: runs while condition is true 8️⃣ *What is the use of break, continue, pass?* – break: exits loop – continue: skips to next iteration – pass: placeholder, does nothing 9️⃣ *What is a ternary operator?* One-line if-else:

result = "Yes" if x> 0 else "No"

🔟 *What is list comprehension?* A concise way to create lists:

squares = [x*x for x in range(5)]

💬 *Double Tap ❤️ for more*

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✅ *50 Must-Know Java Concepts for Interviews* ☕💡 📍 *Java Basics* 1. What is Java? 2. JVM, JRE, JDK 3. Data Types & Variables 4. Operators 5. Type Casting 📍 *Control Flow* 6. if-else 7. switch-case 8. for, while, do-while loops 9. break & continue 10. Ternary operator 📍 *OOP Concepts* 11. Class & Object 12. Inheritance 13. Polymorphism (compile-time & runtime) 14. Abstraction 15. Encapsulation 📍 *Core OOP in Java* 16. Method Overloading 17. Method Overriding 18. Constructor & Constructor Overloading 19. ‘this’ & ‘super’ keywords 20. Static keyword 📍 *Exception Handling* 21. try-catch-finally 22. throw vs throws 23. Checked vs Unchecked Exceptions 24. Custom Exceptions 25. Common exceptions (NullPointer, ArrayIndex, etc.) 📍 *Collections Framework* 26. List, Set, Map 27. ArrayList vs LinkedList 28. HashSet vs TreeSet 29. HashMap vs TreeMap 30. Iterator & Enhanced for-loop 📍 *Strings & Arrays* 31. String vs StringBuilder vs StringBuffer 32. Common String methods 33. 1D & 2D Arrays 34. Array vs ArrayList 35. String immutability 📍 *Advanced Java* 36. Interfaces & Abstract Classes 37. Lambda Expressions 38. Functional Interfaces 39. Streams API 40. File I/O (FileReader, BufferedReader) 📍 *Multithreading & Concurrency* 41. Thread class vs Runnable 42. Thread Lifecycle 43. Synchronization 44. wait(), notify(), notifyAll() 45. Executor Framework 📍 *Best Practices & Tools* 46. Writing Clean Code 47. Java Memory Model (Heap vs Stack) 48. Garbage Collection basics 49. Unit Testing (JUnit) 50. Version control (Git + GitHub) 💬 *Tap ❤️ if you found this helpful!*

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