Staff / Principal Interview Questions
228 questions across 34 categories
Expert-level and system-design questions — the scope, trade-offs, and organizational reasoning expected at the most senior technical levels.
A function migrated from Gen 1 to Gen 2 started returning occasionally-wrong results under load — what changed, and how do you fix it?
ExpertGCPCloud Functions8 min
A Cloud Function times out mid-execution after partially completing a multi-step operation — what state does it leave behind, and how do you design around this?
AdvancedGCPCloud Functions7 min
After adding a Serverless VPC Access connector to a Cloud Function, cold starts got noticeably slower — why, and is this avoidable?
AdvancedGCPCloud Functions6 min
How would you audit an entire GCP organization to find every principal holding Owner or Editor at the project level, before a security review?
AdvancedGCP7 min
A GCP service account key was accidentally committed to a public repository — walk through your incident response, GCP-specific steps included.
AdvancedGCP8 min
How would you design a CI/CD pipeline's GCP authentication using service account impersonation instead of a downloaded key, and why is that safer?
AdvancedGCP7 min
How would you design a fast, event-driven alerting system to catch an accidentally-public Cloud Storage bucket within minutes, GCP-native?
ExpertGCPCloud Storage8 min
A bucket scan flags a bucket as publicly readable, but Public Access Prevention shows as enabled — how is that possible, and how do you investigate it?
AdvancedGCPCloud Storage7 min
A signed URL was accidentally shared publicly — can you revoke it before it expires, and how would you design around this risk?
AdvancedGCPCloud Storage7 min
Object versioning was enabled for safety, but a lifecycle rule deleting noncurrent versions caused the same data loss versioning was meant to prevent — how?
AdvancedGCPCloud Storage7 min