You often receive flat files or exports that need cleanup before they can be loaded, reconciled, or analyzed. In an interview, the goal is to understand how you choose functions that reduce manual work and make data more reliable.
What advanced Excel functions do you commonly use, and how do you apply them to clean, transform, or validate data? Focus on the functions you reach for most often, what problem each one solves, and how they help you prepare data for downstream SQL analysis.
Keep your answer practical and specific. You do not need to list every Excel feature; instead, explain a few functions you use regularly, why they matter, and a simple example of when each is useful.
