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[General] Linux Foundation KCNA Pdf Version, Reliable KCNA Test Objectives

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【General】 Linux Foundation KCNA Pdf Version, Reliable KCNA Test Objectives

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Linux Foundation Kubernetes and Cloud Native Associate Sample Questions (Q37-Q42):NEW QUESTION # 37
You are using ArgoCD to manage your Kubernetes cluster with GitOps. How can you configure ArgoCD to automatically update the cluster when a new image tag is pushed to a container registry?
  • A. Configure ArgoCD to use a webhook that triggers an update whenever a new image tag is pushed.
  • B. Use the *imagelJpdateStrategy' field in the deployment configuration to define the update policy.
  • C. Configure ArgoCD to use a Cron job that regularly checks for new image tags.
  • D. Use the *imagePullPolicys field in the container definition to automatically pull the latest image.
  • E. Use the *imagePullSecrets• field in the deployment configuration to provide the registry credentials to ArgoCD.
Answer: A
Explanation:
ArgoCD can be configured to use webhooks, which are HTTP callbacks triggered by events like image pushes to container registries. This allows ArgoCD to automatically update the cluster whenever a new image tag is pushed, ensuring your deployments are always using the latest image versions.

NEW QUESTION # 38
You have a Kubernetes cluster with a pod that uses a resource limit of 100m CPU. What happens if the pod requests more CPU resources than the limit?
  • A. The pod will be scheduled on a different node with more available resources.
  • B. The pod will be throttled and its performance will be impacted.
  • C. The pod will be automatically scaled down to 100m CPU.
  • D. The pod will continue to run using the requested amount of CPU.
  • E. The pod will be killed and restarted.
Answer: B
Explanation:
The pod will be throttled and its performance will be impacted. The CPIJ limit acts as a hard ceiling, preventing the pod from consuming more resources than specified. Even if the pod requests more CPU, it will be constrained to the limit, leading to performance degradation. The pod will not be killed, restarted, or automatically scaled down. It will continue to run, but its performance will be affected due to the resource constraint.

NEW QUESTION # 39
Which of the following Kubernetes components is responsible for authenticating and authorizing users who access the Kubernetes API?
  • A. kube-proxy
  • B. kubelet
  • C. kubectl
  • D. apiserver
  • E. etcd
Answer: D
Explanation:
The Kubernetes API server (apiserver) is responsible for authenticating and authorizing users who access the Kubernetes API. It enforces access control rules based on RBAC (Role-Based Access Control) configurations. The apiserver acts as the central control point for all Kubernetes interactions, ensuring secure and controlled access to cluster resources.

NEW QUESTION # 40
You are running a Kubernetes cluster with multiple nodes. Your application's Pods need to be scheduled across different nodes for high availability. Which Kubernetes concept allows you to control the distribution of Pods across the cluster?
  • A. Node Affinity
  • B. Service
  • C. Ingress
  • D. Deployment
  • E. Pod Security Policy
Answer: A
Explanation:
Node Affinity lets you define rules to control where your Pods are scheduled. You can specify hard (required) or soft (preferred) preferences for nodes based on labels or other criteria. This helps to distribute Pods across the cluster for better resource utilization and fault tolerance.

NEW QUESTION # 41
Which of the following is a recommended security habit in Kubernetes?
  • A. Run the containers as the user with user ID 0 (root) and any group ID.
  • B. Allow privilege escalation from within a container as the default option.
  • C. Run the containers as the user with group ID 0 (root) and any user ID.
  • D. Disallow privilege escalation from within a container as the default option.
Answer: D
Explanation:
The correct answer is B. A widely recommended Kubernetes security best practice is to disallow privilege escalation inside containers by default. In Kubernetes Pod/Container security context, this is represented by allowPrivilegeEscalation: false. This setting prevents a process from gaining more privileges than its parent process-commonly via setuid/setgid binaries or other privilege-escalation mechanisms. Disallowing privilege escalation reduces the blast radius of a compromised container and aligns with least-privilege principles.
Options A and C are explicitly unsafe because they encourage running as root (UID 0 and/or GID 0). Running containers as root increases risk: if an attacker breaks out of the application process or exploits kernel/runtime vulnerabilities, having root inside the container can make privilege escalation and lateral movement easier. Modern Kubernetes security guidance strongly favors running as non-root (runAsNonRoot: true, explicit runAsUser), dropping Linux capabilities, using read-only root filesystems, and applying restrictive seccomp/AppArmor/SELinux profiles where possible.
Option D is the opposite of best practice. Allowing privilege escalation by default increases the attack surface and violates the idea of secure defaults.
Operationally, this habit is often enforced via admission controls and policies (e.g., Pod Security Admission in "restricted" mode, or policy engines like OPA Gatekeeper/Kyverno). It's also important for compliance: many security baselines require containers to run as non-root and to prevent privilege escalation.
So, the recommended security habit among the choices is clearly B: Disallow privilege escalation.

NEW QUESTION # 42
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