EPAM Systems Technical Leader interview questions

Started with Basic C# questions, than 1) How to implement the Prototype Pattern. 2) How to implement Template Pattern. 3) How to implement Decorator Pattern. 4) How to implement the versioning of Web Api. 5) Difference between Transient,Scoped and Singletone service in Asp.net core. 6) Explain SOLID principle with example. 7) Difference between IQueryable and IEnumerable. 9) Difference between First() and Single() , linq question. 10) Write a code to calculate the sum of price Different flowers using LSP solid principle. for example: The user will provide flower quantity, and price, input in form of List, (10 lilly , 20 roses, 30 lotus)