My friend had recent interview in October, 2020 and failed due to System Design Question:

The questions asked to him were similar to the following:

1. https://leetcode.com/problems/word-ladder/
2. https://leetcode.com/problems/maximum-non-negative-product-in-a-matrix/
3. Code implementation UNIX find command with file size search and file type search
4. Design Video Streaming service