You have a CI/CD pipeline that uses Cloud Build to build new Docker images and push them to Docker Hub. You use Git for code versioning. After making a change in the Cloud Build YAML configuration, you notice that no new artifacts are being built by the pipeline. You need to resolve the issue following Site Reliability Engineering practices. What should you do?

1. A. Disable the CI pipeline and revert to manually building and pushing the artifacts.
2. B. Change the CI pipeline to push the artifacts to Container Registry instead of Docker Hub.
3. C. Upload the configuration YAML file to Cloud Storage and use Error Reporting to identify and fix the issue.
4. D. Run a Git compare between the previous and current Cloud Build Configuration files to find and fix the bug.

Correct Answer: D
"After making a change in the Cloud Build YAML configuration, you notice that no new artifacts are being built by the pipeline"- means something wrong on the recent change not with the image registry.

You manage several production systems that run on Compute Engine in the same Google Cloud Platform (GCP) project. Each system has its own set of dedicated Compute Engine instances. You want to know how must it costs to run each of the systems. What should you do?

1. A. In the Google Cloud Platform Console, use the Cost Breakdown section to visualize the costs per system.
2. B. Assign all instances a label specific to the system they ru
3. C. Configure BigQuery billing export and query costs per label.
4. D. Enrich all instances with metadata specific to the system they ru
5. E. Configure Stackdriver Logging to export to BigQuery, and query costs based on the metadata.
6. F. Name each virtual machine (VM) after the system it run
7. G. Set up a usage report export to a Cloud Storage bucke
8. H. Configure the bucket as a source in BigQuery to query costs based on VM name.

Correct Answer: B
https://cloud.google.com/billing/docs/how-to/export-data-bigquery

You support a large service with a well-defined Service Level Objective (SLO). The development team deploys new releases of the service multiple times a week. If a major incident causes the service to miss its SLO, you want the development team to shift its focus from working on features to improving service reliability. What should you do before a major incident occurs?

1. A. Develop an appropriate error budget policy in cooperation with all service stakeholders.
2. B. Negotiate with the product team to always prioritize service reliability over releasing new features.
3. C. Negotiate with the development team to reduce the release frequency to no more than once a week.
4. D. Add a plugin to your Jenkins pipeline that prevents new releases whenever your service is out of SLO.

Correct Answer: A
Reason : Incident has not occurred yet, even when development team is already pushing new features multiple times a week. The option A says, to define an error budget "policy", not to define error budget(It is already present). Just simple means to bring in all stakeholders, and decide how to consume the error budget effectively that could bring balance between feature deployment and reliability.
The goals of this policy are to: -- Protect customers from repeated SLO misses -- Provide an incentive to balance reliability with other features https://sre.google/workbook/error-budget-policy/

You need to run a business-critical workload on a fixed set of Compute Engine instances for several months. The workload is stable with the exact amount of resources allocated to it. You want to lower the costs for this workload without any performance implications. What should you do?

1. A. Purchase Committed Use Discounts.
2. B. Migrate the instances to a Managed Instance Group.
3. C. Convert the instances to preemptible virtual machines.
4. D. Create an Unmanaged Instance Group for the instances used to run the workload.

Correct Answer: A

Your application images are built and pushed to Google Container Registry (GCR). You want to build an automated pipeline that deploys the application when the image is updated while minimizing the development effort. What should you do?

1. A. Use Cloud Build to trigger a Spinnaker pipeline.
2. B. Use Cloud Pub/Sub to trigger a Spinnaker pipeline.
3. C. Use a custom builder in Cloud Build to trigger a Jenkins pipeline.
4. D. Use Cloud Pub/Sub to trigger a custom deployment service running in Google Kubernetes Engine(GKE).

Correct Answer: B
https://cloud.google.com/architecture/continuous-delivery-toolchain-spinnaker-cloud https://spinnaker.io/guides/user/pipeline/triggers/pubsub/