When it gets to the round 2 or 3 technical interview, there is little to no questions on pandas. It is strictly focused on Python. Focus on looking at a table with unorganized data and thinking about how you would reorganize it, know your For Loops, and crush bloomberg starred leetcode easy questions. Also, you might be asked a question on statistics, for me it was how to sample a population, and how to sample a population of a million or more. Know the names and if possible the formulas.