Terrible interview process. The position was already low-paying, and half the interviewers were pompous or incompetent.

During my system design interview, the interviewer gave me a vague question and refused to provide further clarification. I proposed a correct solution, but he shot it down several times. Then, after 20 minutes, he became irate and said the answer was obvious. I could not understand at all what the question he was asking was.

System design: Design a way to determine the lineage of a data source.

Example: A is a result of B and C being joined, so return A -> B, C -> ...