Answer: Use Google Cloud Build to create separate pipelines for front-end and back-end.

The most appropriate approach for designing the CI/CD pipeline for the given scenario would be to use Google Cloud Build to create separate pipelines for front-end and back-end. Here’s why this approach is the best choice: - **Flexibility**: Google Cloud Build provides flexibility to create separate pipelines for different components of the application, allowing for independent development, testing, and deployment. - **Scalability**: Google Cloud Build can handle large and complex projects, scaling up or down resources as needed. - **Integration**: It integrates seamlessly with other Google Cloud Platform services, making it easy to manage the entire application lifecycle. - **Efficiency**: By creating separate pipelines, you can optimize the build and test processes for each component, improving overall efficiency. While other options might be possible, they have certain drawbacks: - Using Jenkins with separate pipelines: This approach can be more complex to manage and maintain, especially if the project grows large. - Using Google Cloud Build and Cloud Run with a single pipeline: While this approach can simplify the deployment process, it might not be as efficient for large and complex applications. - Using Kubernetes Engine and Jenkins with a single pipeline: This approach can be more complex and resource-intensive, especially for smaller projects. Therefore, using Google Cloud Build with separate pipelines for the front-end and back-end is the most recommended approach for the given scenario.

Author: LeetQuiz Editorial Team