group discussion round, puzzles, aptitude, basic core java questions: what is method overloading, method overriding, collections, inheritance, abstraction, polymorphism, oops, sql queries: joins, subqueries, questions related to backend server, springboot, mvc

They conduct 4 rounds of interview 1st apti and coding 2nd round GD 3rd round TR1 4th round TR2 I cleared all round but i don't know on what basis they are judging