Helm charts concept in Kubernetes - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

What is the primary purpose of a Helm chart in Kubernetes?

Choose the best description of what a Helm chart does in Kubernetes.

A It packages Kubernetes resources into a reusable and configurable unit for easy deployment.

B It monitors the health of Kubernetes nodes and reports failures.

C It automatically scales pods based on CPU usage without configuration.

D It replaces Kubernetes API server to manage cluster state.

💡 Hint

Think about what helps you install and manage apps easily on Kubernetes.

A Helm chart bundles Kubernetes manifests and settings so you can deploy apps repeatedly with different configurations.

💻 Command Output

intermediate

What is the output of 'helm list' command?

After installing several Helm charts, you run helm list. What information does it show?

A A list of all Helm charts available in the remote repository.

B A list of all Docker images used in the cluster.

C A list of all Kubernetes pods running in the default namespace.

D A list of all deployed Helm releases with their status and namespace.

💡 Hint

Think about what Helm tracks after you deploy apps.

The helm list command shows all Helm releases installed in the cluster, including their names, namespaces, and current status.

❓ Configuration

advanced

Which Helm chart file defines default configuration values?

In a Helm chart directory, which file is used to set default values that users can override during installation?

A values.yaml

B Chart.yaml

C templates/deployment.yaml

D requirements.yaml

💡 Hint

This file holds settings like image tags and replica counts.

The values.yaml file contains default configuration values for the chart. Users can override these when installing or upgrading.

❓ Troubleshoot

advanced

What error occurs if a Helm template references a missing value?

If a Helm chart template tries to use a value not defined in values.yaml or overrides, what happens when you run helm install?

A Helm install ignores the missing value and uses the last known value.

B Helm install fails with a template rendering error about the missing key.

C Helm install succeeds but the missing value is replaced with zero.

D Helm install automatically adds the missing value to <code>values.yaml</code>.

💡 Hint

Think about what happens if a required setting is not provided.

Helm templates require all referenced values to be defined. Missing keys cause rendering errors and stop installation.

🔀 Workflow

expert

What is the correct order of Helm commands to update a deployed release with new configuration?

Arrange these Helm commands in the order you would use to update an existing release with changed values.

A 1,3,2,4

B 1,2,3,4

C 3,1,2,4

D 3,2,1,4

💡 Hint

Think about checking the repo first, then updating it, then upgrading the release, and finally verifying.

First, search the repo to find the chart. Then update the repo to get latest charts. Next, upgrade the release with new values. Finally, list releases to verify.