The initial stage involves an online HackerRank test, spanning two hours. It is crucial to remain on the test page throughout this duration, as switching browser tabs is prohibited and will trigger a warning from the HackerRank. The assessment comprises 30 questions covering a variety of topics, including operating systems (e.g., the banker's algorithm, threads, CPU scheduling), programming in C (e.g., structures, unions, strings), security, and several coding problems.

Was asked to write code for a given question. Interviewer disagreed to my solution for a question on doubly linked list [which was correct way of doing it), and never listened.