AWS DevOps Engineer Professional Practice Test

What is the main advantage of using Blue/Green deployments in AWS?

1. Shorter downtime during updates

2. Better cost management

3. Improved security features

4. Automatic scaling of resources

The correct answer is: Shorter downtime during updates

The primary advantage of using Blue/Green deployments in AWS is the reduction of downtime during updates. This deployment strategy involves maintaining two identical environments, referred to as the "Blue" environment (the current production environment) and the "Green" environment (the new version with the update). When the new version is ready for deployment, it is launched in the Green environment, while the Blue environment remains fully operational and serving user traffic. Once the Green environment is successfully tested and validated, traffic can be seamlessly routed from Blue to Green with a simple change in configuration. This rapid switch significantly minimizes any potential downtime that users may experience during the deployment process. In the event of issues or bugs, it is easy to roll back to the Blue environment by redirecting traffic back, ensuring application availability. While the other options mention factors such as cost management, security features, and automatic scaling, these are not the primary benefits of the Blue/Green deployment approach. The focus here is primarily on deploying updates with high availability and minimal service interruption, highlighting the advantage of shorter downtime during updates.