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NEW QUESTION # 49
An attacker has successfully overwhelmed the Kubernetes API server in a cluster with a single control plane node by flooding it with requests.
How would implementing a high-availability mode with multiple control plane nodes mitigate this attack?
Answer: A
Explanation:
* Inhigh-availability clusters, multiple API server instances run behind a load balancer.
* Thisdistributes client requests across multiple API servers, preventing a single API server from being overwhelmed.
* Exact extract (Kubernetes Docs - High Availability Clusters):
* "A highly available control plane runs multiple instances of kube-apiserver, typically fronted by a load balancer, so that if one instance fails or is overloaded, others continue serving requests."
* Other options clarified:
* A: Network segmentation does not directly mitigate API server DoS.
* C: Adding resources helps, but doesn't solve single-point-of-failure.
* D: Rate limiting is a valid mitigation but not provided by HA alone.
References:
Kubernetes Docs - Building High-Availability Clusters: https://kubernetes.io/docs/setup/production- environment/tools/kubeadm/high-availability/
NEW QUESTION # 50
What is Grafana?
Answer: D
Explanation:
* Grafana:An open-source analytics and visualization platform widely used with Prometheus, Loki, etc.
* Exact extract (Grafana Docs):"Grafana is the open-source analytics and monitoring solution for every database. It allows you to query, visualize, alert on, and understand your metrics no matter where they are stored."
* A is wrong:That describesJaeger(distributed tracing).
* B is wrong:That'sKubernetesitself.
* D is wrong:That'sTrivy/Aqua/Prismatype tools.
References:
Grafana Docs: https://grafana.com/docs/grafana/latest/
NEW QUESTION # 51
Which standard approach to security is augmented by the 4C's of Cloud Native security?
Answer: C
Explanation:
* The 4C's model (Cloud, Cluster, Container, Code) is presented in the official Kubernetes documentation as alayeredmodel that explicitly maps todefense-in-depth.
* Exact extracts from Kubernetes docs(security overview):
* "The 4C's of Cloud Native Security are Cloud, Clusters, Containers, and Code."
* "You can think of the 4C's asa layered approach to security; applying security measures at each layer reduces risk."
* "This layered approach is commonly known asdefense in depth."
References:
Kubernetes Docs - Security overview #The 4C's of Cloud Native Security: https://kubernetes.io/docs
/concepts/security/overview/#the-4cs-of-cloud-native-security
NEW QUESTION # 52
A container running in a Kubernetes cluster has permission to modify host processes on the underlying node.
What combination of privileges and capabilities is most likely to have led to this privilege escalation?
Answer: B
Explanation:
* hostPID:When enabled, the container shares the host's process namespace # container can see and potentially interact with host processes.
* SYS_PTRACE capability:Grants the container the ability to trace, inspect, and modify other processes (e.g., via ptrace).
* Combination of hostPID + SYS_PTRACE allows a container toattach to and modify host processes, which is a direct privilege escalation.
* Other options explained:
* hostPath + AUDIT_WRITE:hostPath exposes filesystem paths but does not inherently allow process modification.
* hostNetwork + NET_RAW:grants raw socket access but only for networking, not host process modification.
* A:Incorrect - such combinationsdo exist(like B).
References:
Kubernetes Docs - Configure a Pod to use hostPID: https://kubernetes.io/docs/tasks/configure-pod-container
/share-process-namespace/
Linux Capabilities man page: https://man7.org/linux/man-pages/man7/capabilities.7.html
NEW QUESTION # 53
What mechanism can I use to block unsigned images from running in my cluster?
Answer: B
Explanation:
* KubernetesAdmission Controllers(particularlyValidatingAdmissionWebhooks) can be used to enforce policies that validate image signatures.
* This is commonly implemented withtools like Sigstore/cosign, Kyverno, or OPA Gatekeeper.
* PodSecurityPolicy (PSP):deprecated and never supported image signature validation.
* Pod Security Standards (PSS):only apply to pod security fields (privilege, users, host access), not image signatures.
* CRI:while runtimes (containerd, CRI-O) may integrate with signature verification tools, enforcement in Kubernetes is generally done viaAdmission Controllersat the API layer.
Exact extract (Admission Controllers docs):
* "Admission webhooks can be used to enforce custom policies on the objects being admitted." (e.g., validating signatures).
References:
Kubernetes Docs - Admission Controllers: https://kubernetes.io/docs/reference/access-authn-authz
/admission-controllers/
Sigstore Project (cosign): https://sigstore.dev/
Kyverno ImageVerify Policy: https://kyverno.io/policies/pod-security/require-image-verification/
NEW QUESTION # 54
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