I had a Karat interview where I was able to answer the first coding question but didn't have time to move on to second question. Karat allows a redo for interviews, where CZI is supposed to take the stronger of the two interviews, so I also did a second interview with Karat. During the second interview, I completed the coding question as well as had time to discuss and begin (but not finish) the implementation of the second coding question. Interviewer provided feedback that it was ok that I didn't finish implementation and seemed to agree with my verbalized approach. Based off of feedback from interviewer as well as my own performance on both the coding and system design sections, I felt I had a strong interview, but was still rejected without any feedback. Feels a bit odd that interviews are outsourced to Karat, and you don't get the opportunity to learn anything about CZI from someone who actually works there.