IBS Software interview questions in Bangalore Rural

I had interview at ibs software as java developer, there 3 rounds but i have attened two rounds ,second round was failed they have asked write java 8 program for find department has max employees and project,java,spring boot,mvc,java 8 related questions, its great experience for me, but i didn't selecetd for hr round, some how i have dissppointed, be confidence at interview, give anwsers clearly and more innovatily