Maven / ArgoCD interview questions

What is ArgoCD and what problem does it solve?

ArgoCD is a declarative, GitOps-based continuous delivery tool for Kubernetes. It automates the deployment of applications to Kubernetes clusters by continuously syncing the cluster state to match the desired state defined in a Git repository.

Before ArgoCD, teams often relied on push-based CI/CD pipelines where a CI server would apply manifests to the cluster after a build. This meant credentials to the cluster had to live inside the CI system, rollbacks required re-running pipelines, and there was no single source of truth for what was actually deployed. ArgoCD flips this to a pull-based model: an agent running inside the cluster watches Git and applies changes itself, removing the need to expose cluster credentials externally.

It solves three concrete problems: drift detection (it continuously compares live state vs Git state and reports or auto-corrects differences), auditability (every change is a Git commit with author, timestamp, and message), and multi-cluster management (a single ArgoCD instance can deploy to many clusters from one control plane).

ArgoCD uses which deployment model to apply changes to a Kubernetes cluster?Push-based: the CI server pushes manifests directly to the cluster

✗ Try again — that is the traditional CI/CD approach ArgoCD replaces.

Pull-based: an in-cluster agent pulls desired state from Git and applies it

✓ Well done! ArgoCD's agent inside the cluster pulls from Git, keeping credentials inside the cluster.

Event-based: a webhook fires directly into the Kubernetes API from GitHub

✗ Try again — webhooks notify ArgoCD to refresh, but the agent itself performs the apply.

Which of the following is a core problem ArgoCD solves?Compiling application source code faster

✗ Try again — ArgoCD is a CD tool; it does not handle build or compile steps.

Storing container images in a private registry

✗ Try again — image storage is the job of a container registry, not ArgoCD.

Detecting and correcting drift between desired Git state and live cluster state

✓ Well done! Drift detection and correction is one of ArgoCD's primary functions.

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What is ArgoCD and what problem does it solve? What is GitOps and how does ArgoCD implement it? What are the core components of ArgoCD? What is an ArgoCD Application and what fields does its manifest require? What are the different application sync statuses in ArgoCD? How do you install ArgoCD on a Kubernetes cluster? What is an ArgoCD Project and how does it differ from a Kubernetes namespace? How does ArgoCD support Helm charts? How does ArgoCD support Kustomize? What is self-healing in ArgoCD and how do you enable it? What is the difference between ArgoCD automated sync and self-healing? How does ArgoCD handle resource pruning and what risks does enabling it carry? What is the ArgoCD App of Apps pattern and when should you use it? How do ArgoCD Sync Waves and Sync Hooks work together to control deployment ordering? What is an ArgoCD ApplicationSet and how does the Git generator work? How does ArgoCD integrate with external secret management tools like Vault or Sealed Secrets? How do you configure ArgoCD RBAC and what are the built-in roles? What is ArgoCD Image Updater and how does it automate container image updates? How does ArgoCD manage multiple clusters and what are the methods for registering them? What are ArgoCD Sync Windows and how do you configure them? How does ArgoCD handle ignoreDifferences and when should you use it? What are ArgoCD resource health checks and how do you write a custom one? How does ArgoCD handle SSO and what identity providers does it support? What is the ArgoCD CLI and what are the most common commands used day-to-day? How does ArgoCD compare to Flux and when would you choose one over the other? What is server-side apply in ArgoCD and why might you enable it? How does ArgoCD handle notifications and what channels does it support? How do you perform a rollback in ArgoCD? What is the ArgoCD repository server caching strategy and how does it affect performance?

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Maven / ArgoCD interview questions

What is ArgoCD and what problem does it solve?

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