The interview discussed the tech skills and projects mentioned in my resume. Since I had recently started one NLP based project, the interviewer asked me a challenge that I might face in that domain and how I am planning to overcome it. I thought for a while and gave a simple answer which I could think of at that time.

Explain the internal working of HashMaps in Java.
What is the importance of hash code function?
How does Java work internally (JVM and its use)
How is Java different from Python?