Two senior engineers interviewed me. I was told to study operating systems and know basic C for the interview (the position was Junior Core SE with C/C++), but nothing on OS was asked in either interview.

The first interview had three questions, and the second interview had one question. I reached the second interview but did not continue.

Both interviews were 1.5 hours long. The people were professional and good.

1. Implement a data structure with the following operations in O(1) time complexity:

   • get()
   • set()
   • setAll()

2. Implement a Spinlock using Compare & Set/Test & Set.

3. Implement a ReaderWriterLock using Spinlocks from question 2.

4. LeetCode-style question on disks & storage: how to seek to the correct disk/page according to a given pointer (the pointer is a byte in the system).