Wipro Tech Leader interview questions

1. if 3 method is their, methd(String), methd(int), methd(Object), if we pass method(null) what will be called. 2. Lazy initialization in hibernate 3. difference between save and persist 4. how we can achieve different environment properties using profiling in spring boot. 5. list {3,5,6,3}, sort the list, reverse order, remove duplicates using Java 8 6. What is written in main file of spring boot. 7. When two request update the same row of database, what will happen? 8. How to create the sequence in database ? 9. What is yield in multi threading ?