I recently gave interview for summer internship at coinbase.
The OA included easy leetcode problems and logical reasoning paper. Coding OA had 4 problems and in first 3 even suboptimal solutions would pass.
The interview was system design/ low level design based a question with multiple parts was asked with focus on writing clean oop code.

P.S. I haven't recieved any sort of communication from HR for over a month now, If anybody who also gave the interview for this internship did recieve any followup please do tell.