Freecharge Payments Technologies Pvt Ltd Software Developer (Backend) interview questions

first the do online resume shortlisting Personal interview in PR basically they check the problem solving skill and finally they give final job offer sometimes they give offer in axis bank also as requirement the follow

Interview Process was online Total 3 Technical Interviews were taken. 1st round was DS and Algo, I was asked alternate approaches. The interviewer was helping with the hints and everything 2nd round Java Fundamentals(Hashmap internal working, design patterns, mysql queries), it was taken by a senior employee. Interview went over for an hour 3rd was Hiring Manager Round(DS), Interviewer seemed to be in a hurry, interview finished in 25 minutes, and got a negative feedback few days later