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

The most cost-effective way to utilize Jenkins with AWS CodeBuild is to run Jenkins in a Docker container. This approach benefits from enhanced resource utilization and minimizes overhead costs associated with maintaining dedicated infrastructure. By leveraging containers, you can easily scale Jenkins based on demand, allowing for efficient resource management and reduced costs. Containerized applications can also be quickly deployed, updated, and torn down, providing significant operational flexibility.

Using a single Jenkins master instance is less cost-effective because it may become a bottleneck as demand increases. It also lacks redundancy in case of failures, potentially leading to downtime and additional costs associated with recovery.

Deploying Jenkins in a multi-master setup across multiple Availability Zones, while it enhances redundancy and availability, incurs additional costs for the infrastructure and requires more management overhead, making it less suitable for cost-effective implementations.

Implementing Jenkins on-premise and connecting via VPN could lead to high costs due to hardware, maintenance, and network setup requirements. This configuration also inherently lacks the scalability and flexibility provided by cloud services like AWS.

In contrast, running Jenkins in a Docker container not only optimizes resource usage but aligns well with cloud-based deployment strategies, making it the most cost-effective choice for integrating Jenkins with AWS CodeBuild.