AWS DevOps Engineer Professional Practice Test

At which level are Lifecycle Event hooks configured in AWS OpsWorks?

1. At the Application level

2. At the Stack level

3. At the Layer level

4. At the Instance level

The correct answer is: At the Layer level

Lifecycle Event hooks in AWS OpsWorks are configured at the Layer level. This means that these hooks are specific to the layers of an application stack, allowing you to execute custom scripts at various points in the lifecycle of those layers. Layers in OpsWorks represent different components of your application, such as web servers, application servers, or database servers. Each layer can have its own set of lifecycle hooks to manage tasks like starting, stopping, or updating instances within that layer. Configuring hooks at this level provides flexibility and granularity, enabling you to manage the behavior of individual components of your application according to specific needs or events. For instance, you might want to run configuration scripts during the "Setup" phase of a web server layer, ensuring that the server is correctly configured upon instantiation. Contrastingly, while Lifecycle Event hooks might seem relevant at other levels, such as at the Application level (which covers the entire application) or at the Stack level (where multiple layers are combined), they are specifically associated with layers to facilitate targeted operations. Instance level hooks, while important, are not the focus for Lifecycle Events since these hooks are meant to coordinate broader tasks across layers rather than act upon individual instances.