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NEW QUESTION # 232
What is an ephemeral container?
Answer: C
Explanation:
B is correct: an ephemeral container is a temporary container you can add to an existing Pod for troubleshooting and debugging without restarting the Pod. This capability is especially useful when a running container image is minimal (distroless) and lacks debugging tools like sh, curl, or ps. Instead of rebuilding the workload image or disrupting the Pod, you attach an ephemeral container that includes the tools you need, then inspect processes, networking, filesystem mounts, and runtime behavior.
Ephemeral containers are not part of the original Pod spec the same way normal containers are. They are added via a dedicated subresource and are generally not restarted automatically like regular containers. They are meant for interactive investigation, not for ongoing workload functionality.
Why the other options are incorrect:
* D describes init containers, which run before app containers start and are used for setup tasks.
* C resembles the "sidecar" concept (a supporting container that runs alongside the main container), but sidecars are normal containers defined in the Pod spec, not ephemeral containers.
* A is not a definition; ephemeral containers are not "root by design" (they can run with various security contexts depending on policy), and they aren't limited to infosec use cases.
In Kubernetes operations, ephemeral containers complement kubectl exec and logs. If the target container is crash-looping or lacks a shell, exec may not help; adding an ephemeral container provides a safe and Kubernetes-native debugging path. So, the accurate definition is B.
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NEW QUESTION # 233
What is the difference between a Deployment and a ReplicaSet?
Answer: D
Explanation:
A Deployment is a higher-level controller that manages ReplicaSets and provides rollout/rollback behavior, so D is correct. A ReplicaSet's primary job is to ensure that a specified number of Pod replicas are running at any time, based on a label selector and Pod template. It's a fundamental "keep N Pods alive" controller.
Deployments build on that by managing the lifecycle of ReplicaSets over time. When you update a Deployment (for example, changing the container image tag or environment variables), Kubernetes creates a new ReplicaSet for the new Pod template and gradually shifts replicas from the old ReplicaSet to the new one according to the rollout strategy (RollingUpdate by default). Deployments also retain revision history, making it possible to roll back to a previous ReplicaSet if a rollout fails.
Why the other options are incorrect:
A is false: Deployments absolutely control the number of replicas via spec.replicas and can also be controlled by HPA.
B is false: ReplicaSets do guarantee that a stable number of replicas is running (that is their core purpose).
C is false: a Deployment is not "a ReplicaSet with annotations." It is a distinct API resource with additional controller logic for declarative updates, rollouts, and revision tracking.
Operationally, most teams create Deployments rather than ReplicaSets directly because Deployments are safer and more feature-complete for application delivery. ReplicaSets still appear in real clusters because Deployments create them automatically; you'll commonly see multiple ReplicaSets during rollout transitions. Understanding the hierarchy is crucial for troubleshooting: if Pods aren't behaving as expected, you often trace from Deployment → ReplicaSet → Pod, checking selectors, events, and rollout status.
So the key difference is: ReplicaSet maintains replica count; Deployment manages ReplicaSets and orchestrates updates. Therefore, D is the verified answer.
NEW QUESTION # 234
Which of the following is a recommended security habit in Kubernetes?
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 # 235
kubeadm is an administrative dashboard for kubernetes
Answer: A
Explanation:
https://kubernetes.io/docs/reference/setup-tools/kubeadm/
NEW QUESTION # 236
Which of the following best describes the way kubernetes Role-based access control (RBAC) works?
Answer: B
Explanation:
https://kubernetes.io/docs/reference/access-authn-authz/rbac/
NEW QUESTION # 237
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