There were three rounds, it seems. I couldn't get through the second.

The first round was written. They gave me a question paper containing questions on Java, HTML, CSS, JavaScript, and SQL. It was easy, though.

Then came the second round, which was F2F with one-on-one interaction. He tried to comfort me by asking a few questions about my previous experience and then started with core Java. He went deep into topics like JVM architecture, why primitives and uses of wrapper classes, serialization, multithreading, etc. He asked me to write pseudocode for creating a doubly linked list and so on. This went for 25-30 minutes. He then asked me to wait outside, only to hear that my F2F feedback was negative.

Collections

Multithreading

Basics on Hibernate framework

Asked me to write pseudocode for a doubly linked list in Java.

Create a binary tree.