Your question is Design Patterns Used. 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).
What design patterns have you used in past projects?
Asked in the LLD / Hiring Manager Round stage. Asked during the last 10 minutes of the HM round. Answer using one or two real projects, explaining the problem, pattern selection, alternatives considered, implementation, and outcome. Do not list patterns without connecting them to concrete design decisions.