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A preview from our curated question bank. The generator produces fresh, AI-tailored questions on each run.
What is the difference between a Docker image and a Docker container?
Tip: Image: read-only template with filesystem layers (like a class). Container: running instance of an image with its own writable layer (like an object). Multiple containers share the same image layers, saving disk space.
What is CI/CD? Describe the stages of a typical pipeline.
Tip: CI: automatically build + test on every commit. CD: automatically deploy to staging or production. Typical stages: source, build, unit test, integration test, security scan, staging deploy, smoke test, production deploy.
What is Kubernetes? Explain pods, deployments, and services.
Tip: Pod: smallest deployable unit, one or more co-located containers. Deployment: manages replica sets, handles rolling updates and rollbacks. Service: stable DNS name + load balancing across pods — because pod IPs are ephemeral.
What is infrastructure-as-code (IaC)? Compare Terraform and AWS CloudFormation.
Tip: IaC: manage infra via version-controlled config files. Terraform: cloud-agnostic, HCL language, state file management. CloudFormation: AWS-native, YAML/JSON, deeper AWS integration. Terraform is the industry standard for multi-cloud.
What is a blue-green deployment? How does it reduce downtime?
Tip: Two identical production environments (blue = live, green = new version). Deploy to green, run smoke tests, then switch the load balancer. Instant rollback by switching back to blue. Drawback: 2x infrastructure cost. Canary deployments are a cost-efficient alternative.
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