Typical recruiter vetting, then interview with the hiring manager. Simple exercise based on Docker. I would say it was not too hard. Anyone with the Docker knowledge would be able to pass.
Regarding my current experience Kubernetes related questions
The following metrics were computed from 1 interview experience for the Proofpoint DevOps Engineer role in Detroit, Michigan.
Proofpoint's interview process for their DevOps Engineer roles in Detroit, Michigan is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Proofpoint's DevOps Engineer interview process in Detroit, Michigan.