Troubleshooting Interview Questions — All Categories
141 questions across 32 categories
Real production incidents, spanning Kubernetes, AWS, Docker, Terraform, CI/CD, networking, and databases — diagnosing a specific symptom back to its actual cause, not textbook definitions.
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's p99 latency is dominated by cold starts under bursty traffic — how would you mitigate this, and what's the actual cost trade-off?
IntermediateGCPCloud Functions7 min
A Pub/Sub-triggered Cloud Function occasionally processes the same message twice — is this a bug, and how do you actually fix it?
IntermediateGCPCloud FunctionsPub/Sub7 min
A Cloud Function has been silently failing for days with no alert firing — what's typically missing in the observability setup, and how do you fix it?
IntermediateGCPCloud Functions6 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
A Cloud Function works perfectly with the Functions Framework locally but fails immediately in production — how do you systematically narrow down why?
IntermediateGCPCloud Functions7 min
A browser-based app can list bucket contents but fails to upload directly to Cloud Storage with a CORS error — how do you fix the bucket's CORS configuration?
IntermediateGCPCloud Storage6 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
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