Your question is Merchandise Catalog Top-K. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Low-level design/machine coding: implement a merchandise catalog that tracks item popularity (e.g. by clicks) and returns the top-K popular items.
Asked in the LLD round stage. Explain your class design, APIs, data structures, update semantics, and complexity. Discuss how your design behaves under concurrent updates and ties in popularity.