Siemens Software Engineer - Java Developer interview questions

The first round is Technical i dont know abt other round bcs got rejected in first only. Interviewer asked sm code snipets abt core java most focus on multiple inheritence, up-casting,down casting and abstract class and interface final static methods . questions are not straight forward i feel disaappointing like i know everything but couldnt anser sm questions bcs of questions are not straight forward..? but its my fault i couldnt answer it then sm questions on spring basic questions like on DI,IOC, Bean, mapping Db