AWS DevOps Engineer Professional Practice Test 2025 - Free DevOps Practice Questions and Certification Study Guide

To schedule additional capacity in an OpsWorks stack layer, the most effective approach is to add time-based instances and configure timings. This method enables you to define specific periods when additional instances should be launched automatically. By setting up time-based instances, you can ensure that your application has the necessary resources during peak usage times without requiring manual intervention each time. This automated scaling method helps in optimizing cost and performance, as it allows for precise control over the number of instances based on anticipated load patterns.

Utilizing other methods, such as manually adding instances every day or employing a script to add instances at a specific time, lacks the efficiency and automation that come with time-based instances. While these methods could work, they do not provide the same level of integration and ease of use as configuring time-based scaling directly within OpsWorks. Additionally, while CloudWatch Events can be leveraged to monitor certain triggers, they are typically more suitable for responding to events rather than scheduling instances for consistent, predictable loads. Thus, the option to add time-based instances is the most suited for this requirement.