Nestlé interview question

Technical test : architecture design, choose the technologies and explain your choices coding exercise in python: given a list of words and a letter, write a function that returns the top 3 words starting with this letter. Same question, but with a pattern (ex: "abc"). Imagine the list of words is too big to load into memory, how would you handle it ? technical questions about database index, data file formats (iceberg, delta lake...)