Helm Intermediate Quiz

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Welcome! 🚀 Challenge yourself with intermediate Helm concepts including templating, hooks, and release strategies.

Instructions:

• Select the best answer for each question.
• Your score will be shown at the end.
• Aim for 100% mastery!

#

What templating engine does Helm use?

Go templates

Jinja2

Mustache

Handlebars

Helm uses the Go template language, allowing you to inject values into your YAML manifests.

#

Which file is used to define reusable named templates?

_helpers.tpl

_templates.tpl

helpers.yaml

functions.go

_helpers.tpl (starting with an underscore) is the convention for defining named templates.

#

How do you perform a dry-run to validate templates against the server?

helm install --dry-run

helm validate

helm lint

helm verify

--dry-run simulates the install, validating the generated manifests against the Kubernetes API server.

#

What does the . (dot) represent in a template?

The current scope/context

The global root

The current variable

The root of the filesystem

The dot represents the current context, which changes inside range/with blocks.

#

Which command helps debug a failing template by printing the manifests?

helm template --debug

helm debug

helm install --verbose

helm log

--debug outputs the generated YAML (even if invalid) so you can inspect errors.

#

What is a Helm Hook?

A mechanism to run tasks at specific points in a release lifecycle

A way to connect two charts

A git webhook

A security policy

Hooks allow you to intervene at certain points in a release’s life cycle (e.g., pre-install, post-upgrade).

#

How do you define dependencies for a chart?

In Chart.yaml under dependencies

In requirements.yaml (Old way)

In values.yaml

In subcharts.txt

Dependencies are defined in the dependencies list in Chart.yaml (Helm 3).

#

Which command downloads chart dependencies?

helm dependency update

helm modules download

helm get dependencies

helm install deps

helm dependency update downloads archives for matching dependencies into the charts/ directory.

#

What is the helm upgrade --install command used for?

It installs the chart if it doesn't exist, or upgrades it if it does

It forces a reinstall

It only upgrades existing charts

It installs only the dependencies

This idempotent command is commonly used in CI/CD pipelines.

#

How do you access the Release Name in a template?

{{ .Release.Name }}

{{ .Name }}

{{ .Chart.Name }}

{{ .Values.Name }}

The Release object contains release details like Name, Namespace, and Service.

#

What is .helmignore used for?

To exclude files from the chart package

To ignore errors

To skip tests

To ignore values

It prevents specified files from being included in the helm chart archive (.tgz).

#

How do you retrieve the user-supplied values for a release?

helm get values

helm list values

helm show values

helm inspect values

helm get values downloads the user-supplied value overrides for a named release.

#

Does Helm manage the lifecycle of CRDs in the crds/ directory?

No, it only installs them; it does not upgrade or delete them

Yes, fully managed

Only upgrades, no deletes

Only deletes, no upgrades

Helm intentionally does not manage CRD updates to prevent data loss.

#

Which function converts a structure into a YAML string?

toYaml

toJson

yaml

toString

The toYaml function is crucial for dumping entire blocks of configuration (like securityContext or resources) into templates.

#

How do you package a chart into a .tgz file?

helm package

helm bundle

helm zip

helm compress

helm package creates a versioned chart archive.

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What does the required function do?

Fails template rendering if a value is missing

Marks a field as optional

Imports a required file

Validates Kubernetes version

It enforces that a specific value must be provided, otherwise generation fails with an error message.

#

Which action is used to loop over a list?

range

loop

for

each

The {{ range }} action iterates over slices/arrays or maps.

#

What does helm upgrade --atomic do?

Rolls back changes if the upgrade fails

Deletes the release on failure

Skips verification

Runs sequentially

It sets --wait and automatically rolls back if the operation fails.

#

Which function allows you to query the cluster for existing resources?

lookup

get

query

fetch

The lookup function lets you fetch resources from the live cluster during templating (except in dry-run).

#

What is a Named Template?

A reusable template snippet defined with define

A file in the templates folder

A variable in values.yaml

A Kubernetes resource name

Named templates (usually in _helpers.tpl) allows you to define a snippet once and reuse it via include or template.

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