What is the default update strategy used by Kubernetes Deployments for rolling out updates?

What is the default update strategy used by Kubernetes Deployments for rolling out updates?

• A. RollingUpdate
• B. Recreate
• C. BlueGreen
• D. Canary

Answer: (A)

Rolling updates are the default method Kubernetes uses to update a Deployment. With this strategy, the new version is rolled out gradually: Kubernetes creates new pods with the updated image while keeping some old pods running, then terminates the old ones in chunks according to the maxUnavailable and maxSurge settings. This preserves availability during the upgrade and allows easy rollback if something goes wrong. Recreate would shut down all old pods before starting new ones, risking downtime; BlueGreen and Canary are deployment patterns that require additional setup beyond the built-in default. So the default update strategy for Deployments is rollingUpdate.

Rolling updates are the default method Kubernetes uses to update a Deployment. With this strategy, the new version is rolled out gradually: Kubernetes creates new pods with the updated image while keeping some old pods running, then terminates the old ones in chunks according to the maxUnavailable and maxSurge settings. This preserves availability during the upgrade and allows easy rollback if something goes wrong. Recreate would shut down all old pods before starting new ones, risking downtime; BlueGreen and Canary are deployment patterns that require additional setup beyond the built-in default. So the default update strategy for Deployments is rollingUpdate.