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| Section | Objectives |
|---|---|
| Topic 1: Kubernetes Fundamentals | - Core Kubernetes concepts
|
| Topic 2: Cloud Security and Governance | - Security fundamentals in cloud native systems
|
| Topic 3: Container Orchestration | - Container lifecycle and scheduling
|
| Topic 4: Cloud Native Observability | - Monitoring and logging
|
| Topic 5: Cloud Native Architecture | - Microservices and distributed systems
|
| Topic 6: Cloud Native Application Delivery | - CI/CD and deployment strategies
|
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NEW QUESTION # 90
You are using Prometheus to monitor a Kubernetes cluster. You want to set up an alert that triggers when the average CPU usage of all nodes in the cluster exceeds 80% for the last 10 minutes. Which Prometheus query can achieve this?
Answer: B
Explanation:
The query > 0.8' calculates the average system CPU usage across all nodes over the last 10 minutes. The filter ensures that only system CPU usage is considered. If the average exceeds 0.8 (80%), the alert will trigger.
NEW QUESTION # 91
How is application data maintained in containers?
Answer: A
Explanation:
Container filesystems are ephemeral: the writable layer is tied to the container lifecycle and can be lost when containers are recreated. Therefore, maintaining application data correctly means storing it in volumes, making D the correct answer. In Kubernetes, volumes provide durable or shareable storage that is mounted into containers at specific paths. Depending on the volume type, the data can persist across container restarts and even Pod rescheduling.
Kubernetes supports many volume patterns. For transient scratch data you might use emptyDir (ephemeral for the Pod's lifetime). For durable state, you typically use PersistentVolumes consumed by PersistentVolumeClaims (PVCs), backed by storage systems via CSI drivers (cloud disks, SAN/NAS, distributed storage). This decouples the application container image from its state and enables rolling updates, rescheduling, and scaling without losing data.
Options A and B ("folders") are incomplete because folders inside the container filesystem do not guarantee persistence. A folder is only as durable as the underlying storage; without a mounted volume, it lives in the container's writable layer and will disappear when the container is replaced. Option C is incorrect because "sidecar containers" are not a data durability mechanism; sidecars can help ship logs or sync data, but persistent data should still be stored on volumes (or external services like managed databases).
From an application delivery standpoint, the principle is: containers should be immutable and disposable, and state should be externalized. Volumes (and external managed services) make this possible. In Kubernetes, this is a foundational pattern enabling safe rollouts, self-healing, and portability: the platform can kill and recreate Pods freely because data is maintained independently via volumes.
Therefore, the verified correct choice is D: Store data into volumes.
NEW QUESTION # 92
Which style of operations are preferred for K8S and cloud native applications?
Answer: C
NEW QUESTION # 93
What's the most adopted way of conflict resolution and decision-making for the open-source projects under the CNCF umbrella?
Answer: D
Explanation:
B (Discussion and Voting) is correct. CNCF-hosted open-source projects generally operate with open governance practices that emphasize transparency, community participation, and documented decision-making. While each project can have its own governance model (maintainers, technical steering committees, SIGs, TOC interactions, etc.), a very common and widely adopted approach to resolving disagreements and making decisions is to first pursue discussion (often on GitHub issues/PRs, mailing lists, or community meetings) and then use voting/consensus mechanisms when needed.
This approach is important because open-source communities are made up of diverse contributors across companies and geographies. "Project Founder Say" (D) is not a sustainable or typical CNCF governance norm for mature projects; CNCF explicitly encourages neutral, community-led governance rather than single-person control. "Financial Analysis" (A) is not a conflict resolution mechanism for technical decisions, and "Flipism Technique" (C) is not a real governance practice.
In Kubernetes specifically, community decisions are often made within structured groups (e.g., SIGs) using discussion and consensus-building, sometimes followed by formal votes where governance requires it. The goal is to ensure decisions are fair, recorded, and aligned with the project's mission and contributor expectations. This also reduces risk of vendor capture and builds trust: anyone can review the rationale in meeting notes, issues, or PR threads, and decisions can be revisited with new evidence.
Therefore, the most adopted conflict resolution and decision-making method across CNCF open-source projects is discussion and voting, making B the verified correct answer.
NEW QUESTION # 94
A DevOps engineer must ensure Pods in the testing namespace cannot run with elevated privileges. Which action correctly enforces this restriction?
Answer: C
Explanation:
Pod Security Admission enforces Pod Security Standards at the namespace level. Applying the restricted enforcement profile to the testing namespace prevents privileged containers and other unsafe privilege-escalation settings.
NEW QUESTION # 95
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