{
  "id": "kubectl-essentials-mcq",
  "title": "Essential kubectl Commands",
  "category": "Core Concepts",
  "difficulty": "Easy",
  "type": "mcq",
  "weight": 2,
  "description": "## Essential kubectl Commands\n\nYou need to quickly view the **logs** of a container named `api` inside a pod named `backend-7d9f`. The pod has multiple containers.\n\nWhich command is correct?",
  "options": [
    {
      "id": "a",
      "text": "`kubectl describe pod backend-7d9f`"
    },
    {
      "id": "b",
      "text": "`kubectl logs backend-7d9f`"
    },
    {
      "id": "c",
      "text": "`kubectl logs backend-7d9f -c api`"
    },
    {
      "id": "d",
      "text": "`kubectl exec backend-7d9f -- cat /var/log/api.log`"
    }
  ],
  "correct_option": "c",
  "explanation": "When a pod has **multiple containers**, you must specify which container's logs you want using the `-c <container-name>` flag: `kubectl logs <pod-name> -c <container-name>`. Without `-c`, kubectl returns an error if the pod has more than one container. `kubectl describe` shows metadata and events, not live logs. `kubectl exec` can work but is cumbersome and container-runtime dependent.",
  "hints": [
    {
      "title": "kubectl logs flags",
      "body": "Key flags: `-c` (container name for multi-container pods), `-f` (follow/stream), `--previous` (crashed container logs), `--since=1h` (time filter).",
      "command": "kubectl logs --help | head -30"
    }
  ],
  "setup_commands": [],
  "default_namespace": "default",
  "teardown_commands": []
}