CGOA Gitops Patterns — Timed 10 Questions

Question 1

You are managing environment promotion by overlaying Kustomize patches for 'prod', 'staging', and 'dev'. Which TWO of the following practices follow the GitOps principle of 'single source of truth' for environment configuration?

10 minute time limit — choose an answer to begin.

Accepted Answer

Using a 'base' directory for common resources and 'overlays' for environment differences. Separation of base and overlays ensures that the base configuration is shared, while environment-specific differences are isolated.

Answer

Hardcoding environment-specific image tags in the base templates

Answer

Storing all environment manifests in a single monolithic flat directory

Answer

Duplicating all YAML files for every environment

Question 2

You are implementing the App-of-Apps pattern using Argo CD. You have a root Application that points to a Helm chart containing multiple sub-Application manifests. When you update the source Git repository, some sub-applications remain in an 'OutOfSync' state while others update successfully. What is the most likely cause?

Accepted Answer

The child applications have 'automated.prune' set to false within their respective SyncPolicy objects.. The App-of-Apps pattern relies on the Argo CD controller to process the root application first. If the sub-applications are not being pruned or updated, it is often due to the 'self-heal' or 'prune' policy being disabled in the Application resource definition for the child applications.

Answer

The root application lacks the 'self-heal' parameter in its SyncPolicy.

Answer

The root application is using a recursive sync interval that is too high.

Answer

Argo CD requires a Project-level permission override for nested applications.

Question 3

When using the 'Git-generator' in ApplicationSet, you want to include only a subset of directories based on a specific file content. Which feature of ApplicationSet allows you to filter the directories discovered?

Accepted Answer

The 'selector' field within the generator.. The 'template.path' field combined with 'files' or 'directories' generators allows for granular control over which paths are included, and you can use the 'paths' field to specify glob patterns.

Answer

The 'syncPolicy' field.

Answer

The 'ignoreDifferences' field.

Answer

The 'AppProject' filter.

Question 4

You are implementing progressive delivery using Flagger. After a Canary resource is defined, which metric is most critical for Flagger to automatically rollback a deployment during a blue/green shift?

Accepted Answer

Request success rate and latency metrics. Flagger uses analysis templates to evaluate Prometheus metrics; if the error rate or latency thresholds are exceeded, it triggers a rollback.

Answer

Pod CPU usage

Answer

Number of running replicas

Answer

Git commit hash parity

Question 5

In a multi-cluster GitOps architecture using Argo CD, how do you manage credentials for a remote cluster that is not the cluster where Argo CD resides?

Accepted Answer

Use the argocd cluster add command to store credentials as a secret in the Argo CD namespace. You must add the remote cluster's API server and authentication credentials to Argo CD using the 'argocd cluster add' command, which stores the secret in the Argo CD namespace.

Answer

Modify the global ConfigMap in the Argo CD namespace

Answer

Add the cluster URL to the Git repository manifest

Answer

Manually create a Kubernetes secret in the remote cluster

Question 6

Your organization uses the App-of-Apps pattern in Argo CD to manage hundreds of microservices. You need to ensure that when a developer updates a repository structure, the root application automatically discovers and syncs new child applications without manual intervention. Which feature should be enabled in the Application resource?

Accepted Answer

Enable automated sync policy with self-healing and allow-empty. The self-healing and automated sync policies, combined with directory recursion, allow the App-of-Apps pattern to maintain state automatically.

Answer

Use the 'ignoreDifferences' field for the child application manifests

Answer

Set the sync policy to 'manual' and use a post-sync hook

Answer

Configure a manual webhook trigger on the root application

Question 7

In a blue-green progressive delivery deployment using Flagger, you notice that the 'primary' service is not receiving traffic even after the analysis successfully completes. What is the most likely cause?

Accepted Answer

The VirtualService or HTTPRoute is not pointing to the primary service. Flagger requires the primary service to be defined correctly for traffic shifting to occur.

Answer

The analysis template lacks the 'weight' parameter

Answer

The Flagger controller is in 'paused' mode

Answer

The canary resource is missing a 'host' definition

Question 8

You are deploying applications across multiple clusters using Argo CD. You want to implement a hub-and-spoke model where the central management cluster controls all edge clusters. Which THREE of the following are necessary to correctly configure this pattern?

Accepted Answer

Ensure the service account for Argo CD has cluster-admin permissions on target clusters. The hub-and-spoke pattern relies on cluster secrets, target cluster definitions, and proper project isolation.

Answer

Install Argo CD control plane components on every edge cluster

Answer

Configure the 'server.enable.proxy' flag in the hub cluster

Question 9

When promoting an application from staging to production using the 'GitOps directory' pattern, what is the most robust way to ensure environment-specific configurations are applied correctly?

Accepted Answer

Using Kustomize overlays for each environment. Using Kustomize overlays allows for a base configuration with environment-specific patches, ensuring no drift between environments.

Answer

Hardcoding environment names inside the main deployment file

Answer

Dynamic shell scripting in the CI pipeline

Answer

multiple_choice

Answer

Copy-pasting YAML files across folders

Question 10

You are managing a large-scale deployment using the App-of-Apps pattern in Argo CD. Which resource type do you primarily use as the parent application to reference child application manifests?

Accepted Answer

Application. The App-of-Apps pattern uses a root Application resource that points to a directory or Git repository containing multiple other Application resources.

Answer

SyncPolicy

Answer

ArgoCD Project

Answer

AppProject