NVIDIA Software Engineer(Internship) interview questions

Talked to recruiter at career fair, emailed 1 week later to arrange interview. Interview consists of 2 phone rounds, first was mainly discussing projects and goals (some theoretical knowledge), second was purely coding (4 questions)

Talked to an engineer at campus career fair, had 2 phone interviews. First interview had more c and general programming questions, second was more focused on testing os and virtual memory concepts