Tata Consultancy Services Software Developer interview questions

it was an onsite interview and questions were mainly around my current project and tech stack based questions. Some OOP's questions were also there like, How is abstract class different from interface. What is Polymorphism, runtime polymorphism vs compile time polymorphism.

hard interview process but was good by fast time and very flexible hours so it was easy but ques asked were hard and solution was easy and no offer by the HR