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.
terraform plan shows changes to a resource you didn't touch, and the diff traces back to a data source — what's actually happening?
AdvancedTerraform7 min
Converting a resource block from count to for_each caused Terraform to want to destroy and recreate every instance — why, and how do you migrate safely?
AdvancedTerraform7 min
terraform init fails with a provider checksum mismatch after a teammate on a different OS committed the lock file — what's happening?
IntermediateTerraform6 min
terraform plan fails with Error acquiring the state lock — how do you diagnose whether it's a genuine concurrent run or a stale lock?
IntermediateTerraform6 min
A Terraform pipeline that worked yesterday suddenly fails today with no code changes — how does an unpinned provider version cause this?
IntermediateTerraform6 min
terraform plan shows a production RDS instance will be destroyed and recreated after a change you thought was trivial. What would you investigate before running apply?
AdvancedTerraformAWS10 min