you should learn technical basis before come to interview. just be confident when you answering question. it's okay if you wrong they'll corrected it. they also ask behaviour question and yiu should ready with your experience

The interview invitation was given only two days in advance, which made it challenging for me to arrange transportation and accommodation. The interviewers were friendly and approachable. However, I feel that I didn’t perform as well as I could have, mainly due to limited preparation for the technical questions. The interview covered my resume, included a few behavioural questions, and a case study. The case study itself was not particularly difficult.