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NEW QUESTION # 277
What is the correct hierarchy of Kubernetes components?
Answer: A
Explanation:
The correct hierarchy is Cluster → Nodes → Pods → Containers. A Kubernetes cluster contains multiple nodes; each node runs pods, and each pod contains one or more containers.
NEW QUESTION # 278
What Kubernetes resource would allow you to run one Pod on some of your Nodes?
Answer: D
Explanation:
https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/
NEW QUESTION # 279
What is the main role of CNCF Ambassadors in the cloud native ecosystem?
Answer: D
Explanation:
CNCF Ambassadors are community leaders who advocate for cloud native technologies, support local communities, organize events, and help drive adoption of CNCF projects.
NEW QUESTION # 280
What service account does a Pod use in a given namespace when the service account is not specified?
Answer: A
Explanation:
D (default) is correct. In Kubernetes, if you create a Pod (or a controller creates Pods) without specifying spec.serviceAccountName, Kubernetes assigns the Pod the default ServiceAccount in that namespace. The ServiceAccount determines what identity the Pod uses when accessing the Kubernetes API (for example, via the in-cluster token mounted into the Pod, when token automounting is enabled).
Every namespace typically has a default ServiceAccount created automatically. The permissions associated with that ServiceAccount are determined by RBAC bindings. In many clusters, the default ServiceAccount has minimal permissions (or none) as a security best practice, because leaving it overly privileged would allow any Pod to access sensitive cluster APIs.
Why the other options are wrong: Kubernetes does not automatically choose "admin," "sysadmin," or "root" service accounts. Those are not standard implicit identities, and automatically granting admin privileges would be insecure. Instead, Kubernetes follows a predictable, least-privilege-friendly default: use the namespace's default ServiceAccount unless you explicitly request a different one.
Operationally, this matters for security and troubleshooting. If an application in a Pod is failing with "forbidden" errors when calling the API, it often means it's using the default ServiceAccount without the necessary RBAC permissions. The correct fix is usually to create a dedicated ServiceAccount and bind only the required roles, then set serviceAccountName in the Pod template. Conversely, if you're hardening a cluster, you often disable automounting of service account tokens for Pods that don't need API access.
Therefore, the verified correct answer is D: default.
NEW QUESTION # 281
You are running a microservice-based application in Kubernetes. Each service has its own HPA configured for scaling. How can you ensure that the scaling decisions for different services are coordinated to prevent resource contention?
Answer: B,D
Explanation:
Both resource quotas and a custom controller can help prevent resource contention. Resource quotas limit the resources each service can consume, preventing one service from monopolizing resources- A custom controller can monitor resource usage across all services and make coordinated scaling decisions to avoid over-provisioning and resource exhaustion.
NEW QUESTION # 282
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