The interview was F2F. It covered various topics, including Java, Spring, design patterns, and two data structure problems based on arrays. The interview stretched to 80-90 minutes.

Although I believe the interview went pretty well, I didn't get any kind of response from HR. The HRs are very unprofessional. They are expected to reply about the outcomes of the interview to candidates who manage time for interviews on weekdays. However, they choose not to pick up your calls or reply to your texts regarding the interview outcome. This behavior towards candidates who even appear for F2F interviews is really rude on their part. Although, initially, one feels bad about such incidents, eventually, no one wants to be part of an unprofessional workplace.

1. Design patterns.
2. Java-Spring related questions.
3. Performance analysis questions.
4. Questions on data structures (array, level medium).