Tata Consultancy Services Sr. Software Engineer interview questions

Two Rounds are there 1) Technical 2) Managerial in Technical round they ask about OPPS, Dependency Injection, Extension Methods , What is difference between abstraction and Interfaces. Difference between Method Overloading and Overriding. What is difference between Primary key and Foreign Key.

It was easy to crack compared to other interviews which i had attended before. I was even asked HR questions in technical interview which purely depends in the interviewer. Be prepared for both.