I received a call from a consultancy, and the interview was conducted on the same weekend. I believe it was a walk-in.

• Aptitude test
• Technical interview
• HR interview

The aptitude and technical interviews were on Friday. The HR round was telephonic on Monday.

1. Quick merge sort
2. Hibernate caching
3. SessionFactory vs. Session
4. Spring DI: constructor vs. setter DI, which is better?
5. Exception vs. Error
6. Runtime vs. compile-time errors, needed
7. ClassDefNotFoundException vs. NoClassFoundException: which occurs at compile time? How to avoid compile exceptions?
8. ArrayList vs. LinkedList
9. HashSet
10. Data structures for HashSet and ArrayList
11. Internal working of HashSet
12. Employee e = new Employee(); Employee e1 = e; e == null; System.out.println(e1);