BNP Paribas Python Developer interview questions

Interview Experience The interview started with a standard “Tell me about yourself.” Based on my introduction, the discussion moved into Django, followed by an in-depth focus on Python, which formed the major part of the interview. The Python section covered core concepts thoroughly, including: Mutable vs immutable data types Lambda functions map, filter, and reduce with examples Public, protected, and private variables (with examples and runtime behavior) Difference between @staticmethod and @classmethod Difference between == and is in Python Global Interpreter Lock (GIL) and whether Python supports multithreading Whether a list can be used as a key in a dictionary and why The interview then moved to Pandas, where I was asked about: Difference between loc and iloc apply vs map merge vs join Finally, there was a SQL round, which included: Types of joins Explanation and example of a self join What a stored procedure is Overall, the interview was concept-heavy and technical, focusing on fundamentals and real understanding rather than superficial answers. Being thorough with Python basics, Pandas, and SQL concepts is key to doing well.