The one thing they asked me was to explain the 4 pillars of OOPs (Object-Oriented Programming). They wanted me to describe each pillar in detail, and I explained Inheritance, Encapsulation, Polymorphism, and Abstraction.The interview process consisted of 3 rounds. The first round was an aptitude test, which included questions on logical reasoning, basic Java, and SQL. The second round was a technical interview, where I was asked about Java OOPs concepts, collections, and basic SQL queries. The third round was an HR interview, where they asked for a basic introduction, salary expectations, and information about the company.