NVIDIA Senior Systems Software Engineer interview questions

They showed me a relatively simple function, with some resource allocation logic inside, and asked how I would design the function's signature so that a caller would be able to access the allocated resource but leave the release of it to the same callee.

typical ice breakers like volatile, static etc. question about compiler optimization. what happens if compiler can't store variable in a register ? then gave me a code snippet to find bug. was an array out of bounds access in a for loop. then in last 10 mins or so, asked me to write malloc and free for a fixed buffer array and return offset to user.