{
  "id": "services-mcq",
  "title": "Kubernetes Service Types",
  "category": "Networking",
  "difficulty": "Easy",
  "type": "mcq",
  "weight": 4,
  "description": "## Choose the Right Service Type\n\nYou have a microservice running inside the cluster that needs to be reachable **from the internet** (external traffic). The cluster is hosted on a cloud provider (AWS/GCP/Azure).\n\nWhich **Service type** should you use?",
  "options": [
    {
      "id": "a",
      "text": "ClusterIP — the default service type, only reachable within the cluster"
    },
    {
      "id": "b",
      "text": "NodePort — opens a port on every node, accessible from outside if the node IP is reachable"
    },
    {
      "id": "c",
      "text": "LoadBalancer — provisions a cloud load balancer and assigns an external IP automatically"
    },
    {
      "id": "d",
      "text": "ExternalName — maps the service to a DNS name, not suitable for external ingress"
    }
  ],
  "correct_option": "c",
  "explanation": "`LoadBalancer` is the right choice for production external traffic on cloud-hosted clusters. It provisions a cloud provider load balancer (like an AWS ALB or GCP L4 LB) and assigns an external IP. `NodePort` works in theory but requires knowing node IPs and is not production-grade. `ClusterIP` is internal-only. `ExternalName` is for mapping services to external DNS names.",
  "hints": [
    {
      "title": "Recall Service types",
      "body": "There are 4 service types: ClusterIP (internal), NodePort (node-level), LoadBalancer (cloud LB), ExternalName (DNS alias). Each builds on the previous in terms of exposure level.",
      "command": "kubectl explain service.spec.type"
    }
  ],
  "setup_commands": [],
  "default_namespace": "default",
  "teardown_commands": []
}
