Interviewers focus on prior experience and applicable skill rather than technical knowledge of the position you are applying. Hence, it is best to study on how prior experience and skill could contribute to the applied position.

Lots of assessments carried out before reaching the individual interview. After submitting the documents required, you are asked to record a video (~1 min), write a BM essay (~150 words), take an assessment (math, english, logic). After that, there'll be a group and individual interview. If you're looking to join the digital career, you could be given 2 extra assessments. I personally think this is the hardest interview I ever had because the questions asked by the interviewers were super specific. But if you've made enough preparation, you should be fine.