Capgemini Interview Question

A very common questions like, 1. Serialization 2.Synchronization 3. Internal implementation of HashMap 4. Default Size of HashMap and ArrayList 5. Struts Configuration file 6. Lazy loading and Eager loading 7. Dispatch Action VS SwitchAction VS LookupDispatchAction 8. Decode and second max salry of an employee query 9.wait and sleep 10. Some questions on Collections