Pass the Linux Foundation DevOps and Site Reliability CGOA Questions and answers with ValidTests

Blue-Green deployments are aprogressive delivery patternwhere two environments exist: Blue (current version) and Green (new version). The new version is deployed in parallel, and once validated, traffic is switched over from Blue to Green.

“Blue-Green deployments provide zero-downtime releases by running two production environments: one active and one idle. A new version is deployed to the idle environment, tested, and when ready, traffic is switched to it.”

Thus, the correct description isA.

The first GitOps principle isDeclarative Descriptions. This means the desired system configuration (for infrastructure, services, and applications) is expressed declaratively and stored in version control. Git becomes the single source of truth.

“The desired system state must be expressed declaratively. This provides a clear, machine-readable blueprint for the system, and ensures that what is in Git is what should be running in the environment.”

Therefore,infrastructure and application configurations must be defined declaratively and stored in Git, not managed imperatively or manually.

TheDesired State, stored in Git, is the ultimate source of truth in GitOps. It defines how the system should look and behave. Continuous deployment processes reconcile the actual cluster state against this Desired State.

“In GitOps, the desired state kept in Git is the single source of truth. The reconciler ensures the actual state matches the desired state, guiding the continuous deployment process.”

Thus, the correct answer isA.

Configuration as Codeis a GitOps-related practice where configurations are stored as declarative definitions in version control. Helm charts, for example, allow applications deployed on Kubernetes to have both their container images and configuration specified declaratively.

“Configuration as Code enables teams to manage application and infrastructure configuration in version control systems, using declarative approaches such as Kubernetes manifests or Helm charts. This ensures repeatability, automation, and auditability.”

Thus,Helm chartsare a prime example of this practice, makingCcorrect.

In GitOps,everything that defines the system, including dashboards, must be stored declaratively in Git(the Desired State store). This ensures dashboards are versioned, reproducible, and consistent across environments.

“GitOps requires that all system components, including monitoring and observability configurations such as dashboards, are declared in Git. This ensures they are versioned, immutable, and reproducible.”

Thus,Dis correct.

In GitOps,Git is the single source of truth. If changes are made manually in the cluster (viakubectl), those changes will drift from the desired state in Git. To ensure consistency, the correct approach is toupdate the Git repository (Desired State store)so that the reconciler can continuously apply and maintain those changes.

“The desired state must always be declared in Git. Manual changes in the cluster will be overwritten by reconciliation unless they are committed to the Git repository.”

Thus, the correct answer isB.

TheState Storeis typically implemented using aversion control system (VCS)such as Git. This ensures that the system’s state is auditable, versioned, and immutable. Other systems like databases or distributed file systems do not meet the immutability and versioning requirements of GitOps.

“In GitOps, the desired state must be stored in a version control system. This serves as the State Store, providing a complete, immutable, and auditable history of changes.”

Thus, the correct answer isD: version control system.

ACanary Deploymentgradually introduces a new application version to a small subset of users before expanding to the full user base. This pattern allows testing and validation in production while reducing risk.

“Canary deployments progressively roll out changes to a small group of users, monitoring for issues before routing all traffic to the new version. This gradual shift minimizes risk and ensures safer releases.”

Thus, the correct answer isB.