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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cloud Native Architecture | 16% | - Infrastructure and Practices
|
| Topic 2: Kubernetes Fundamentals | 46% | - Kubernetes API
|
| Topic 3: Cloud Native Application Delivery | 8% | - CI/CD
|
| Topic 4: Cloud Native Observability | 8% | - Logging
|
| Topic 5: Container Orchestration | 22% | - Service Mesh
|
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NEW QUESTION # 200
What is the purpose of the CRI?
Answer: A
Explanation:
The Container Runtime Interface (CRI) exists so Kubernetes can support pluggable container runtimes behind a stable interface, which makes C correct. In Kubernetes, the kubelet is responsible for managing Pods on a node, but it does not implement container execution itself. Instead, it delegates container lifecycle operations (pull images, create pod sandbox, start/stop containers, fetch logs, exec/attach streaming) to a container runtime through a well-defined API. CRI is that API contract.
Because of CRI, Kubernetes can run with different container runtimes-commonly containerd or CRI-O- without changing kubelet core logic. This improves portability and keeps Kubernetes modular: runtime innovation can happen independently while Kubernetes retains a consistent operational model. CRI is accessed via gRPC and defines the services and message formats kubelet uses to communicate with runtimes.
Option B is incorrect because replication and scaling are handled by controllers (Deployments/ReplicaSets) and schedulers, not by CRI. Option D is incorrect because resource criteria (requests/limits) are expressed in Pod specs and enforced via OS mechanisms (cgroups) and kubelet/runtime behavior, but CRI is not "for defining dynamic resource criteria." Option A is vague and not the primary statement; while CRI enables runtime integration, its key purpose is explicitly to make runtimes pluggable and interoperable.
This design became even more important as Kubernetes moved away from Docker Engine integration (dockershim removal from kubelet). With CRI, Kubernetes focuses on orchestrating Pods, while runtimes focus on executing containers. That separation of responsibilities is a core container orchestration principle and is exactly what the question is testing.
So the verified answer is C.
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NEW QUESTION # 201
What cloud-native construct does a kubernetes pod wrap?
Answer: D
Explanation:
Kubernetes is an orchestrator of containerized apps. However, containers must be wrapped in pods before they can be deployed on kubernetes.
NEW QUESTION # 202
In a Kubernetes cluster, which scenario best illustrates the use case for a StatefulSet?
Answer: C
Explanation:
A StatefulSet is a Kubernetes workload API object specifically designed to manage stateful applications.
Unlike Deployments or ReplicaSets, which are intended for stateless workloads, StatefulSets provide guarantees about the ordering, uniqueness, and persistence of Pods. These guarantees are critical for applications that rely on stable identities and durable storage, such as databases, message brokers, and distributed systems.
The defining characteristics of a StatefulSet include stable network identities, persistent storage, and ordered deployment and scaling. Each Pod created by a StatefulSet receives a unique and predictable name (for example, database-0, database-1), which remains consistent across Pod restarts. This stable identity is essential for stateful applications that depend on fixed hostnames for leader election, replication, or peer discovery. Additionally, StatefulSets are commonly used with PersistentVolumeClaims, ensuring that each Pod is bound to its own persistent storage that is retained even if the Pod is rescheduled or restarted.
Option A is incorrect because web applications that scale horizontally for load balancing are typically stateless and are best managed by Deployments, which allow Pods to be created and destroyed freely without preserving identity. Option B is incorrect because traffic routing to microservices is handled by Services or Ingress resources, not StatefulSets. Option C is incorrect because periodic background jobs that do not maintain state are better suited for Jobs or CronJobs.
Option D correctly represents the ideal use case for a StatefulSet. Databases require persistent data storage, stable network identities, and predictable startup and shutdown behavior. StatefulSets ensure that Pods are started, stopped, and updated in a controlled order, which helps maintain data consistency and application reliability. According to Kubernetes documentation, whenever an application requires stable identities, ordered deployment, and persistent state, a StatefulSet is the recommended and verified solution, making option D the correct answer.
NEW QUESTION # 203
What native runtime is Open Container Initiative (OCI) compliant?
Answer: B
Explanation:
The Open Container Initiative (OCI) publishes open specifications for container images and container runtimes so that tools across the ecosystem remain interoperable. When a runtime is "OCI-compliant," it means it implements the OCI Runtime Specification (how to run a container from a filesystem bundle and configuration) and/or works cleanly with OCI image formats through the usual layers (image # unpack # runtime). runC is the best-known, widely used reference implementation of the OCI runtime specification and is the low-level runtime underneath many higher-level systems. In Kubernetes, you typically interact with a higher-level container runtime (such as containerd or CRI-O) through the Container Runtime Interface (CRI). That higher-level runtime then uses a low-level OCI runtime to actually create Linux namespaces
/cgroups, set up the container process, and start it. In many default installations, containerd delegates to runC for this low-level "create/start" work.
The other options are related but differ in what they are: Kata Containers uses lightweight VMs to provide stronger isolation while still presenting a container-like workflow; gVisor provides a user-space kernel for sandboxing containers; these can be used with Kubernetes via compatible integrations, but the canonical
"native OCI runtime" answer in most curricula is runC. Finally, "runV" is not a common modern Kubernetes runtime choice in typical OCI discussions. So the most correct, standards-based answer here is A (runC) because it directly implements the OCI runtime spec and is commonly used as the default low-level runtime behind CRI implementations.
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NEW QUESTION # 204
You are developing a microservices application where each service requires a specific configuration. Which Kubernetes feature best addresses this need for service-specific configuration?
Answer: E
Explanation:
ConfigMaps allow you to store key-value pairs of configuration data, which can be easily mounted as environment variables or files within your containers. This is ideal for handling service-specific configurations.
NEW QUESTION # 205
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