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Question 341

Which Helm command displays available chart repositories?

1. helm repo list
2. helm charts show
3. helm sources
4. helm repository view

Correct Answer: 1

Explanation:

The helm repo list command displays the chart repositories currently configured in the local Helm client. Repository configuration allows Helm to locate charts published by external or internal chart repositories. Administrators can add repositories with helm repo add, refresh their indexes with helm repo update, and inspect configured repositories using helm repo list. This is useful when troubleshooting why a chart cannot be located or when verifying which repositories are available before installing an application. The command lists repository aliases and their associated URLs.

Question 342

Which Helm command refreshes repository indexes?

1. helm refresh
2. helm repo update
3. helm index sync
4. helm repos reload

Correct Answer: 2

Explanation:

helm repo update downloads the latest chart information from repositories already configured in Helm. Updating repository indexes allows Helm to discover newer chart versions and recently published charts. It does not upgrade applications that are already installed. An administrator typically runs this command before searching for or installing an updated chart version. Repository configuration itself remains intact during the update. If Helm continues showing outdated chart information, refreshing the repository index is an appropriate troubleshooting step.

Question 343

Which Helm command searches configured repositories for charts?

1. helm find
2. helm catalog
3. helm search repo
4. helm locate

Correct Answer: 3

Explanation:

The helm search repo command searches charts available from repositories configured in the local Helm client. It can help administrators locate charts by name or keyword before installation. The command searches repository indexes rather than deployed releases. This distinction is useful because Helm provides separate commands for discovering available charts and inspecting releases that are already installed. After finding a suitable chart, an administrator can inspect its metadata and values before deploying it into the cluster.

Question 344

Which Helm command removes an installed release?

1. helm erase
2. helm delete-release
3. helm remove chart
4. helm uninstall

Correct Answer: 4

Explanation:

helm uninstall removes an installed Helm release from the Kubernetes cluster. The release name identifies the deployed application instance rather than the chart repository entry. Uninstalling a release generally removes the Kubernetes resources managed by that release, subject to Helm behavior and resource-specific considerations. It does not remove the chart from a configured repository. Administrators can use helm list to inspect existing releases before deciding which release should be removed.

Question 345

Which Helm command displays deployed releases in a namespace?

1. helm release list
2. helm list
3. helm deployments
4. helm installed

Correct Answer: 2

Explanation:

The helm list command displays Helm releases installed in the current namespace context. Namespace selection can be controlled through Helm’s namespace-related options. This command is useful when identifying deployed applications, checking release names, or determining which release should be upgraded or removed. Helm releases are instances of charts, so the output helps distinguish multiple deployments that may use the same chart. Administrators commonly inspect the release list before performing upgrade, rollback, or uninstall operations.

Question 346

Which Helm command shows a release’s revision history?

1. helm history
2. helm revisions
3. helm release-log
4. helm versions

Correct Answer: 1

Explanation:

helm history displays the revision history associated with a Helm release. Each upgrade can create a new revision, allowing administrators to review previous deployment states. This history is particularly useful when investigating an unsuccessful upgrade or determining which revision should be restored. The command reports revision information and release status, helping administrators identify an appropriate rollback target. It does not display the complete Kubernetes resource output of every revision; other Helm commands can be used when detailed release information is required.

Question 347

Which Helm command restores a previous release revision?

1. helm revert
2. helm restore
3. helm rollback
4. helm reset

Correct Answer: 3

Explanation:

helm rollback changes a release back to a previously stored revision. This is useful when an upgrade introduces configuration errors, application problems, or unexpected behavior. The administrator specifies the release and target revision, and Helm creates a new deployment state based on that earlier revision. Rollback does not simply erase history; the release history remains available for future inspection. Administrators should review helm history before selecting the target revision so that the intended previous state is clearly identified.

Question 348

Which Helm command renders templates without installing a release?

1. helm preview
2. helm template
3. helm render-only
4. helm manifest

Correct Answer: 2

Explanation:

helm template renders a chart’s templates locally and outputs the resulting Kubernetes manifests without creating a Helm release. This makes it useful for inspecting generated YAML before deployment. Administrators can supply values and other chart options to see how configuration changes affect the rendered resources. It is especially valuable for troubleshooting templating logic, checking generated fields, and reviewing manifests before applying them. Because the command performs local rendering rather than installing the chart, it does not create the normal Helm release record.

Question 349

Which Helm file normally stores default chart configuration values?

1. settings.yaml
2. chart-config.yaml
3. defaults.yaml
4. values.yaml

Correct Answer: 4

Explanation:

A Helm chart normally stores its default configurable values in values.yaml. Templates can reference these values to generate Kubernetes manifests dynamically. Administrators can override defaults during installation or upgrades by supplying additional values. This separation between templates and configuration makes charts reusable across environments. For example, development and production deployments can use the same chart while providing different resource settings or image configurations. Understanding values.yaml is important when troubleshooting why a rendered manifest contains an unexpected configuration.

Question 350

Which Helm directory contains chart template files?

1. templates
2. manifests
3. resources
4. renderfiles

Correct Answer: 1

Explanation:

The templates directory contains the Kubernetes manifest templates used by a Helm chart. Helm processes these templates together with chart values and other metadata to produce Kubernetes resource definitions. Template files commonly use Go templating syntax and Helm-specific functions to create dynamic manifests. Administrators working with custom charts frequently inspect this directory when debugging rendering behavior or modifying resource definitions. The directory is distinct from values.yaml, which primarily provides configurable data consumed by the templates.

Question 351

Which Kustomize file defines an application’s customization?

1. customize.yaml
2. kustomization.yaml
3. overlay.yaml
4. build.yaml

Correct Answer: 2

Explanation:

kustomization.yaml is the central configuration file used by Kustomize to describe resources, transformations, generators, and patches. It tells Kustomize which Kubernetes resources belong to the customization and how they should be modified. The file can reference other manifests and bases while keeping the original resource definitions reusable. Administrators commonly use Kustomize to maintain environment-specific differences without duplicating complete YAML files. The kubectl apply -k command can process a directory containing a valid Kustomization.

Question 352

Which Kustomize concept provides reusable common manifests?

1. Variant
2. Layer
3. Base
4. Profile

Correct Answer: 3

Explanation:

A Kustomize base provides reusable Kubernetes manifests that can be customized by different overlays. This structure helps organizations maintain common application definitions while allowing environments such as development, testing, and production to apply different modifications. An overlay references the base and adds environment-specific changes. This approach reduces duplicated YAML and makes configuration differences easier to manage. A well-designed base typically contains the resources and common settings shared across multiple deployment environments.

Question 353

Which Kustomize concept adds environment-specific changes?

1. overlay
2. variant
3. extension
4. layerPatch

Correct Answer: 1

Explanation:

A Kustomize overlay represents customized configuration built on top of a reusable base. Different overlays can modify values such as image references, replica counts, labels, or other resource properties without copying the entire base configuration. This pattern is useful when the same application must be deployed differently across environments. For example, a production overlay can apply production-specific resources while a development overlay uses separate settings. The base remains reusable, while each overlay expresses its environment-specific requirements.

Question 354

Which kubectl option applies a Kustomize directory?

1. –customize
2. –kustomize
3. –overlay
4. –build-config

Correct Answer: 2

Explanation:

The –kustomize option tells kubectl to process a directory containing a Kustomization. The shorter -k form is commonly used with commands such as kubectl apply -k. Kustomize builds the specified customization and produces the Kubernetes resources described by its configuration. This provides an integrated way to deploy customized manifests without manually generating a combined YAML file first. Administrators should ensure the target directory contains a valid kustomization.yaml and all referenced resources.

Question 355

Which Kubernetes interface connects kubelet with container runtimes?

1. CRI
2. CNI
3. CSI
4. KRI

Correct Answer: 1

Explanation:

The Container Runtime Interface, or CRI, provides the interface through which kubelet communicates with a container runtime. It allows Kubernetes to work with supported runtime implementations without embedding runtime-specific behavior directly into kubelet. CRI concerns container execution and lifecycle operations, while CNI focuses on networking and CSI focuses on storage integration. Understanding these interfaces helps administrators troubleshoot failures involving container startup, runtime connectivity, or node-level container management.

Question 356

Which interface handles Kubernetes container networking?

1. CSI
2. CNI
3. CRI
4. CNRI

Correct Answer: 2

Explanation:

The Container Network Interface, or CNI, provides the mechanism used to configure networking for containers and Pods. CNI plugins can create network interfaces, assign addresses, configure routes, and perform other networking operations required by a Kubernetes cluster. Different CNI implementations provide different capabilities. When Pods remain stuck without usable network connectivity, administrators may need to inspect the CNI plugin, its configuration, node interfaces, and related logs. CNI is separate from CRI and CSI, which serve container-runtime and storage functions respectively.

Question 357

Which interface integrates external storage with Kubernetes?

1. CNI
2. CRI
3. CSI
4. KSI

Correct Answer: 3

Explanation:

The Container Storage Interface, or CSI, provides a standardized mechanism for Kubernetes to interact with storage systems. CSI drivers can provision volumes, attach them to nodes, mount them for Pods, and perform other storage-related operations. This allows Kubernetes to work with many storage platforms without implementing every vendor-specific storage operation directly. When a PersistentVolumeClaim remains pending or a volume fails to mount, examining the CSI driver’s components and events can provide important troubleshooting information.

Question 358

Which resource extends the Kubernetes API with a custom type?

1. CustomResourceDefinition
2. ExtensionSchema
3. ApiExtension
4. CustomObjectSpec

Correct Answer: 1

Explanation:

A CustomResourceDefinition, commonly called a CRD, extends the Kubernetes API with a new custom resource type. After a CRD is installed, users can create objects belonging to that new type just as they create built-in Kubernetes resources. CRDs are commonly used by operators and platform extensions to represent application-specific configuration or operational state. The CRD defines the resource’s schema and API characteristics. Administrators should inspect CRDs when troubleshooting custom resources that are rejected, unavailable, or behaving differently from expected built-in objects.

Question 359

Which Kubernetes component usually reconciles custom resources?

1. scheduler
2. kube-proxy
3. operator
4. CoreDNS

Correct Answer: 3

Explanation:

An operator typically watches custom resources and continuously reconciles the cluster toward the desired state represented by those resources. Operators combine Kubernetes API mechanisms with application-specific operational logic. For example, an operator may create Deployments, Services, or storage resources when a custom application resource is created. The operator pattern extends Kubernetes automation beyond built-in controllers. If a custom resource exists but its expected dependent resources are not created, administrators should investigate the corresponding operator, its permissions, logs, and reconciliation activity.

Question 360

Which Kubernetes object stores non-sensitive configuration data?

1. Credential
2. ConfigMap
3. PrivateConfig
4. RuntimeSecret

Correct Answer: 2

Explanation:

A ConfigMap stores non-confidential configuration data that can be consumed by Pods as environment variables, command arguments, or mounted files. It separates application configuration from container images, allowing configuration to change without rebuilding the image. Sensitive information should normally be represented using a Secret instead. ConfigMaps can be created imperatively or declared through YAML manifests. When an application receives unexpected configuration, administrators can inspect the referenced ConfigMap and verify that the Pod is consuming the intended keys and values.