LTM Limited Interview Question

### **Technical Questions** 1. Explain OOP concepts like Inheritance, Polymorphism, Abstraction, and Encapsulation. 2. What are `final`, `finally`, and `finalize()` in Java? 3. Write a program to reverse a string without using built-in functions. 4. Explain garbage collection in Java. 5. What is the difference between `StringBuffer` and `StringBuilder`? 6. Write a program to implement a binary search algorithm. 7. What is the difference between a list, tuple, and set in Python? 8. Write a program to count the frequency of words in a string using Python. 9. What are *lambda functions*? Provide an example. 10. How does Python handle memory management? 11. Write a program to find duplicates in an array. 12. Solve a problem to find the **smallest missing positive integer** in an array. 13. Explain the difference between linear search and binary search. 14. How does a hash table work? What is its time complexity? 15. Implement a LinkedList in your preferred programming language. --- ### **Database Questions** 16. What is normalization? Explain its types. 17. What are primary keys, foreign keys, and unique constraints? 18. Write an SQL query to find the second highest salary from a table. 19. Explain the difference between **DELETE** and **TRUNCATE** in SQL. 20. What are joins in SQL? Explain INNER JOIN, LEFT JOIN, and RIGHT JOIN. --- ### **Cloud and DevOps** 21. What is AWS EC2, and what are its use cases? 22. Explain the purpose of S3 and Lambda in AWS. 23. What is CI/CD, and how does it help in DevOps? 24. What are containers, and how do tools like Docker and Kubernetes work? --- ### **Behavioral Questions** 25. Tell me about yourself. 26. Why do you want to join LTIMindtree? 27. Describe a challenging project and how you overcame the challenges. 28. Where do you see yourself in five years? 29. What are your strengths and weaknesses? --- ### **Aptitude and Problem-Solving** 30. Solve a problem to find the **sum of all even numbers** in an array. 31. Write an algorithm to check if a string is a palindrome. 32. Solve a problem to find the **longest common prefix** in an array of strings. 33. Write a program to implement bubble sort and explain its time complexity. 34. Find the missing number in a sequence of integers from 1 to N.