Data jobs related interview query

As for the interview round, I have to clear the technical round which includes dsa. I am confused most of the people says choosing java or c++ is best for dsa but data related rools entirely rely on python and few people says dsa with java or c++ is for sde or any other roles expect the data roles. Because we need to be strong in python for data roles. So as for data roles python would be the best, they said.Can anyone who attended or working in data roles clear my confusion? Should I continue dsa with python or for dsa I have to Swift either between jave or c++?