How would you answer an interview scenario involving expression trees and reusable predicates in LINQ?

For an interview scenario involving expression trees and reusable predicates, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. Expression trees represent code as data so IQueryable providers can inspect and translate it. For production, compose Expression<Func<T,bool>> carefully, test provider translation, and keep abstractions understandable. I would then explain the main alternatives and tradeoffs, identify likely failure modes, and describe how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.