IBS Software Senior Software Engineer interview questions

The basic design patterns in java

Peak element, string, immutable classes, new features of java, try with resources, records, actuators, aop, stream API, arraylist vs linkedlist, internal working of hashmap, volatile , execuotservice, how to write a thread, what is deadlock, what to do if load increase, memory efficiency what to do, controlleradvice, cap theorem spring depency injection in detail, is beans, DI,IOC part of spring or java, how is transactions manged in db, what is acid and how is it done, transactional annotaion in detail, how is the APIs exposed, how is authentication and authorization done, how is the authorities fetched,if jwt token is expired then how can it be refreshed and if user logs out how is it handled, restcontroller vs controller, can otherformats be hndled in restcontroller other than json like xml, fetch eager vs lazy in detail, ORM, relationships in db, how many table will be there in many to many