How does a Java class make immutable: In case I explained the use of final in classes, the interviewer expected it to extend some class and be immutable in its own way. 2.- Explanation of threads: Explain how threads work, how they work, how they interact. I didn't remember some methods so I was honest and told him that + add what was his way of interacting, it means how .run() / sleep() vs wait() and use of notify() works, also the reserved word synchronize . At the end of the question and a couple of questions about collections API, he only answered, you are too stupid to answer the questions correctly. I hope you prepare better, make leetcode faster and learn all the basics of java much better. And he closed the Zoom session.

Two MCQs and then two DSA online rounds, then if we pass both of them, then only the actual interview with the hr team. Then it will be contuacted as a normal intervew if we pass the nwe move on