The interviewer asked about basic concepts of programming and basic cs fundamentals. Like what is java, python. Basic programs in any language like Fibonacci series, prime number, etc. They can ask to explain the project you have mentioned in your resume. If you have the basic knowledge, you can easily crack the interview.

Good interview they ask about basic details then they ask what you have worked on and what are you looking to work on and more about technical questions and some theoretical questions and some suitation based.