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| Section | Objectives |
|---|---|
| Cloud Native Observability | - Monitoring and logging
|
| Cloud Native Application Delivery | - CI/CD and deployment strategies
|
| Cloud Security and Governance | - Security fundamentals in cloud native systems
|
| Kubernetes Fundamentals | - Core Kubernetes concepts
|
| Container Orchestration | - Container lifecycle and scheduling
|
| Cloud Native Architecture | - Microservices and distributed systems
|
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NEW QUESTION # 202
What is the main role of the Kubernetes DNS within a cluster?
Answer: B
Explanation:
Kubernetes DNS (commonly implemented by CoreDNS) provides service discovery inside the cluster by assigning stable, consistent DNS names to Services and (optionally) Pods, which makes D correct. In a Kubernetes environment, Pods are ephemeral-IP addresses can change when Pods restart or move between nodes. DNS-based discovery allows applications to communicate using stable names rather than hardcoded IPs.
For Services, Kubernetes creates DNS records like service-name.namespace.svc.cluster.local, which resolve to the Service's virtual IP (ClusterIP) or, for headless Services, to the set of Pod endpoints. This supports both load-balanced communication (standard Service) and per-Pod addressing (headless Service, commonly used with StatefulSets). Kubernetes DNS is therefore a core building block that enables microservices to locate each other reliably.
Option A is not Kubernetes DNS's purpose; it serves cluster workloads rather than external VMs. Option B describes a managed DNS hosting product (creating zones/registries), which is outside the scope of cluster DNS. Option C describes protocol translation, which is not the role of DNS. Dual-stack support relates to IP families and networking configuration, not DNS translating IPv6 to IPv4.
In day-to-day Kubernetes operations, DNS reliability impacts everything: if DNS is unhealthy, Pods may fail to resolve Services, causing cascading outages. That's why CoreDNS is typically deployed as a highly available add-on in kube-system, and why DNS caching and scaling are important for large clusters.
So the correct statement is D: Kubernetes DNS provides consistent DNS names so workloads can communicate reliably.
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NEW QUESTION # 203
Which of the following is NOT a benefit of using a community-driven approach for governing a cloud native application?
Answer: D
Explanation:
While a community-driven approach promotes collaboration and knowledge sharing, it doesn't necessarily lead to stronger security due to centralized control. In fact, it could potentially introduce vulnerabilities if proper security practices are not followed within the community.
NEW QUESTION # 204
You are running a containerized application that requires access to a persistent storage volume. Which of the following Kubernetes objects is primarily used to define the storage request and access modes?
Answer: E
Explanation:
A 'PersistentVolumeClaim• (PVC) is the mechanism used to request and manage persistent storage within Kubernetes. It defines the storage requirements (size, access mode, etc.) for a Pod. While the 'Pod' uses the PVC, the PVC itself describes the storage request, not the Pod.
NEW QUESTION # 205
You are using a Kubernetes deployment to run a web application. You want to roll out a new version of the application with minimal downtime. Which strategy can be used to achieve this?
Answer: B,C,D
Explanation:
RollingUpdate, BlueGreen, and Canary are all strategies that can be used to roll out new application versions with minimal downtime. RollingUpdate updates Pods one by one, ensuring that there are always healthy Pods running. BlueGreen creates two separate environments, one for the old version and one for the new version, and then switches traffic over to the new environment. Canary gradually rolls out the new version to a small subset of users before making it available to everyone. Option 'A' (Recreate) would completely stop the old Pods before creating new ones, which could lead to downtime. Option 'E' (Immutable) is not a deployment strategy for rolling out updates.
NEW QUESTION # 206
What is OPA?
Answer: C
Explanation:
https://www.cncf.io/projects/open-policy-agent-opa/
NEW QUESTION # 207
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