AWS DevOps Engineer Professional Practice Test

What setting in OpsWorks enables automatic replacement of failed instances in a layer?

1. Instance Management

2. Auto Healing

3. Load Balancing

4. Disaster Recovery

The correct answer is: Auto Healing

In OpsWorks, the setting that facilitates the automatic replacement of failed instances in a layer is referred to as Auto Healing. This feature is crucial for maintaining the desired number of operational instances, ensuring that application availability is preserved even in the event of failures. Auto Healing works by monitoring the health of the instances within a layer. If an instance fails or becomes unhealthy, OpsWorks automatically attempts to replace that instance without requiring manual intervention. This capability is particularly beneficial in production environments where uptime and reliability are essential. The other options, while related to instance management and availability, do not specifically focus on the proactive replacement of unhealthy instances within layers. Instance Management pertains to the general oversight of instances, Load Balancing refers to the distribution of incoming traffic across multiple instances to optimize resource usage and performance, and Disaster Recovery involves strategies for recovering from significant failures or outages, rather than managing individual instance health on an ongoing basis.