Learn the IT-English vocabulary of Helm: charts, values, templates, releases, upgrades and rollbacks.
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1 / 10
What is a Helm 'chart'?
A Helm chart bundles templated manifests and defaults so an application can be deployed as one unit.
2 / 10
A 'values.yaml' file is used to do what?
values.yaml provides the configuration values Helm injects into the chart templates at install time.
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Installing a chart creates a 'release'. What is a release?
A release is a specific deployed instance of a chart, tracked by name and revision.
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You run 'helm rollback'. What does it do?
helm rollback restores a prior revision of a release, undoing a problematic upgrade.
5 / 10
Which sentence correctly uses 'templating'?
Templating parameterises manifests so the same chart adapts to dev, staging or prod via different values.
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Alice: 'Hey team, I'm deploying a new version of the service using Helm. I've created a chart with some configuration options in values.yaml. Can someone explain what 'release' means in this context?'
A 'release' in Helm refers to the actively running instance of your chart – it's how Helm tracks and manages changes to that particular deployment. It includes all the resources created by the chart and allows you to roll back or upgrade this specific deployment. Option A is incorrect because values.yaml doesn't store code; option D describes a Git repository.
7 / 10
During a code review, Bob comments on your PR: 'This looks good, but can you use Helm templating to dynamically set the number of replicas based on the environment?' What does Bob mean by 'Helm templating'?
Helm templating allows you to use variables defined in your values.yaml file to control how resources are created within your chart. This is crucial for creating environment-specific configurations – Bob's comment highlights this key capability. Options A and D describe different aspects; option C is unrelated to the core concept of templating.
8 / 10
You're investigating an issue with a deployed service. The Helm CLI shows you have a release named 'my-app-prod'. You run `helm status my-app-prod` and it indicates the number of replicas is incorrect. What should you do?
When a Helm release encounters an issue, running `helm upgrade` again (with the same values.yaml) is often the first step in resolving it – this allows Helm to re-apply the configuration. Deleting the release immediately (option A) can lead to data loss; ignoring errors (option B) is generally discouraged; and scaling the database (option D) isn't directly related to a Helm deployment problem.
9 / 10
Charlie in Slack asks: 'I'm trying to update my chart, but I want to keep the old version around for a backup. How can I do that?'
Helm's `upgrade` command, when used with the same release name, automatically creates a new release while preserving the previous state. This is the standard way to maintain multiple versions of your deployments. Option A is incorrect; option C is too manual and less reliable; and option D would lose the backup.
10 / 10
You're writing a PR description for updating your Helm chart. Which sentence best describes using 'substitutions'?
'Substitutions' in Helm refer to the dynamic replacement of values from your values.yaml file into templates within the chart's manifests – this is a core mechanism for environment-specific configuration. Options A and C are incorrect; option B accurately describes the functionality, and option D relates to scaling, not substitutions.
Learn the IT-English vocabulary of Helm: charts, values, templates, releases, upgrades and rollbacks.
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