As someone who interviews the potential interns, I generally stick to the work they have done in earlier internships. If they have worked in litigation, my questions generally revolve around constitutional law. If they have worked on fintech or cryptocurrency, I ask questions related to those fields and so on. Of course, these are basic questions to assess the work done in past. Since we are not hiring them for a job, the idea is to keep it simple to understand if the intern has got the basics right.

HR related questions- why law etc. I am strictly against it and generally, I do not think it serves much purpose given they are already in 4th or 5th year.

Just had a internship interview last week.
It will be a general interaction. The HR along with SA will be in the panel.
Be prepared for normal HR questions like "Tell me something about yourself" and "Why Law". SA will focus more on your CV. Be thorough with your CV entries, majorly publications and internships. The questions will be around your CV entries largely, though my interview had questions of technical understanding too. But they are were not difficult and connected with my internship experience.
In all, it will be a 15-20 minute interaction. I am sure you will enjoy it.
Goodluck!

If anyone from the readers have prior experience of sitting and qualifying the HR Interview of Khaitan & Co's please share their experiences, questions to expect and any kindly give any additional suggestions or caveats which you want to give me. It"ll be really helpful for me. Thank you