C# supports OOP concepts—classes, objects, inheritance, polymorphism, encapsulation, abstraction. Key features include pipiline , consturcutor private,static., exception handling, interfaces, solid principles , configuration method vs configuration serivce. and memory management via garbage collection.

Interviewed on 23rd Nov ,2019. Only 3 rounds but consumed the entire day (there were many other candidates too). The 1st round is purely technical specially focusing on how strong is ur base. Simple questions but twisting them makes its bit difficult to understand. If your concepts are clear, then it wud b easy else u wud have a difficult time. My first round took 1 hr 45 mins (I know, really long) but d interviewer got into each technology I worked on. The 2nd round was managerial, mainly focusing on Angular, .net core, scenario questions, situation or team handling skills, how ease u r wrt location n time. It took 45 mins to complete. Then finally d HR round. Each round has elimination, 20 mins. If everything goes well, you get the offer on spot.