SanDisk interview questions

Question on array rotation, reversing alternative k nodes of a linked list. copy of a linked list with next and random pointer. Next round was on design. The interviewer asked me to design and implement the UNIX tail command. And a discussion on a memory management in user space and kernel space. Difference between them. Producer consumer problem and how would you tackle the problem to avoid starvation, Managerial round: Few behavioral questions and why do you want to work with our company etc.

Design a buffer using and gate