From what I’ve seen on Glassdoor and my own experience, the process is usually split into two parts.
HR round is more about behavioral fit and motivation — why this role, why the company, and how you communicate.
Hiring manager round goes much deeper. They typically walk through your resume in detail, especially your projects. They focus a lot on:
how you manipulated and cleaned data
how you approached business problems
and how you handled challenges like imbalanced datasets
For example, they might ask what techniques you used — like resampling, class weighting, or choosing the right evaluation metrics like recall or AUC