Preguntas de entrevista para el cargo de Java Developer en SecurView

First round was aptitude test(Java) 25 que 30 min. basic questions on multi threading, exception handeling, Collection framework. Immediately followed by 2nd round. Second round was coding test(pen-paper) having 1 program on stack operations. U need to know collection framework for writing that prpgram. 3rd -technical interview 4th -manageral round 5th -HR I have not cleared the test but HR told us about entire selection process. (out of 9 students, only 1 student was called for 3rd round)