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频道帖子
| 2 |  🖥 Docker Commands Basics | 250 |
| 3 |  🖥 Docker Commands Basics | 250 |
| 4 |  🌐 Git Fundamentals | 394 |
| 5 | ✅ Top 50 Java Interview Questions ☕
1. What are the main features of Java?
2. Difference between JDK, JRE, and JVM
3. What is the Java Virtual Machine (JVM)?
4. Explain the concept of Object-Oriented Programming in Java
5. What is the difference between == and .equals()?
6. What are access modifiers in Java?
7. Difference between abstract class and interface
8. What is a constructor? Types of constructors?
9. What is method overloading and overriding?
10. What is the difference between static and non-static methods?
11. What is the final keyword?
12. What is a package in Java?
13. What is the use of this and super keywords?
14. Difference between String, StringBuilder, and StringBuffer
15. What are exceptions? Checked vs unchecked exceptions
16. What is try-catch-finally in Java?
17. What is the difference between throw and throws?
18. Explain multithreading in Java
19. What is synchronization?
20. What is a thread lifecycle?
21. Explain collections in Java
22. Difference between List, Set, and Map
23. What is the difference between ArrayList and LinkedList?
24. What is HashMap?
25. Difference between HashMap and Hashtable
26. What is the hashCode() and equals() contract?
27. Explain generics in Java
28. What is an enum in Java?
29. What is a lambda expression?
30. What is functional interface?
31. What is the Stream API in Java 8?
32. What is Optional in Java 8?
33. What are default and static methods in interfaces?
34. What is garbage collection in Java?
35. What is the finalize() method?
36. What are annotations?
37. What is reflection in Java?
38. What is serialization and deserialization?
39. What is the transient keyword?
40. How does Java handle memory management?
41. What is JDBC in Java?
42. How do you connect to a database in Java?
43. What is the difference between Statement and PreparedStatement?
44. What is a singleton design pattern?
45. What is the factory pattern?
46. What is dependency injection?
47. What is the difference between stack and heap memory?
48. What are inner classes in Java?
49. What are best practices in exception handling?
50. How do you debug a Java application? | 466 |
