Design related interview questions

1. Object oriented design principles
2. Software design interview questions
3. When to use interface
4. Java enum is class or interface
5. Java67 design pattern questions and answers
6. Java revisited programming interview questions
7. How to analyze the thread dump
8. Understanding various design patterns
9. UML class diagram understanding & creation
10. Points to consider while implementing Observer design pattern
11. Difference between dependency injection and dependency lookup
12. How to program multithreading communication 
13. Managing code maintainability 
14. Maintaining code robustness 
15. Implementing extensible code
16. Optimistic concurrency control concept
17. Optimistic vs Pessimistic locking in Hibernate
18. What is time complexity
19. What is big O notation 
20. How to calculate the complexity of algorithm  
21. Sorting Algorithms -
    
    • Merge Sort 
    • Insertion Sort
22. Searching Algorithms -
    
    • Hash Table  
    • Binary Search Tree
    • B Tree 
    • B+ Tree