Essentially a carbon copy of the Amazon interview as OCI started by ex AWS staff. with 5 interviews - 2 coding interviews, 1 system design interview, 2 behavioural interviews (with the first interview being with the "bartender" who is someone outside the team). The coding questions were standard Leetcode easy questions and the system design questions was also pretty simple. But as with Amazon interviews the marking tends to be weighted to the behavoural questions to make sure you align with the 9 OCI "values". So I think the best way to prepare is to concentrate on memorising the 9 values, identify which of the values that the question is related to then just try to repeat the values in your answer.