Tata Associate Systems Engineer Trainee interview questions

i have selected through codevita(a coding contest) , we have been offered a salary of 3.36lpa for b.tech and 3.6lpa for m.tech. During interview all three rounds happened at a time(technical,HR,Managerial) Firstly in interview i was asked to explain the code which i have executed during the contest later i was asked whether i could able to develop a better logic ,then i solved it by using basic algorithmic techniques like hashing,dynamic programming Then TR went through my resume and asked some questions in it. after that HR asked me questions subsequently followed by MR.