Your question is LINQ and OOP Principles. 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).
Tell me about your experience using LINQ, where you used it, and the main principles of OOP design.
Describe the LINQ operators and execution behavior you have used in production, including how you decide between query and method syntax, deferred and immediate execution, and in-memory versus provider-backed queries. Explain the core OOP principles and how they influence maintainable C# design. Use a concrete example from your experience or a representative code path.