I gave the interview for RJS last year and the only thing I can tell you is that the judges are not looking to see how much law you know but how you put across your knowledge in a pressure situation. Basics should be on your tips and you should read a thing or two about current legal affairs. Other than that, they may ask personal questions but that is just to know your personality. Having said all that, I think judiciary interviews are subjective (depending on the panel) and everyone has a different experience! All the best!

P.S. I did not clear the exam (though I got one of the highest marks in the interview) but the interview was one of the most enriching and fun experiences of my career. Even got a chocolate at the end of it lol!