You are responsible for creating and modifying the Terraform templates that define your Infrastructure. Because two new engineers will also be working on the same code, you need to define a process and adopt a tool that will prevent you from overwriting each other's code. You also want to ensure that you capture all updates in the latest version. What should you do?

• A.* Store your code as text files in Google Drive in a defined folder structure that organizes the files.
  * At the end of each day, confirm that all changes have been captured in the files within the folder structure and create a new .zip archive with a predefined naming convention.
  * Upload the .zip archive to a versioned Cloud Storage bucket and accept it as the latest version.
• B.* Store your code in a Git-based version control system.
  * Establish a process that includes code reviews by peers and unit testing to ensure integrity and functionality before integration of code.
  * Establish a process where the fully integrated code in the repository becomes the latest master version.
• C.* Store your code as text files in Google Drive in a defined folder structure that organizes the files.
  * At the end of each day. confirm that all changes have been captured in the files within the folder structure.
  * Rename the folder structure with a predefined naming convention that increments the version.
• D.* Store your code in a Git-based version control system.
  * Establish a process that allows developers to merge their own changes at the end of each day.
  * Package and upload code lo a versioned Cloud Storage bucket as the latest master version.

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Your product is currently deployed in three Google Cloud Platform (GCP) zones with your users divided between the zones. You can fail over from one zone to another, but it causes a 10-minute service disruption for the affected users. You typically experience a database failure once per quarter and can detect it within five minutes. You are cataloging the reliability risks of a new real-time chat feature for your product. You catalog the following information for each risk:
* Mean Time to Detect (MUD} in minutes
* Mean Time to Repair (MTTR) in minutes
* Mean Time Between Failure (MTBF) in days
* User Impact Percentage
The chat feature requires a new database system that takes twice as long to successfully fail over between zones. You want to account for the risk of the new database failing in one zone. What would be the values for the risk of database failover with the new system?

• A.MTTD: 5
  MTTR: 10
  MTBF: 90
  Impact: 33%
• B.MTTD:5
  MTTR: 20
  MTBF: 90
  Impact: 33%
• C.MTTD:5
  MTTR: 10
  MTBF: 90
  Impact 50%
• D.MTTD:5
  MTTR: 20
  MTBF: 90
  Impact: 50%

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You support a stateless web-based API that is deployed on a single Compute Engine instance in the europe-west2-a zone . The Service Level Indicator (SLI) for service availability is below the specified Service Level Objective (SLO). A postmortem has revealed that requests to the API regularly time out. The time outs are due to the API having a high number of requests and running out memory. You want to improve service availability. What should you do?

• A.Set up additional service instances in other zones and use them as a failover in case the primary instance is unavailable.
• B.Change the specified SLO to match the measured SLI.
• C.Set up additional service instances in other zones and load balance the traffic between all instances.
• D.Move the service to higher-specification compute instances with more memory.

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Your company follows Site Reliability Engineering practices. You are the person in charge of Communications for a large, ongoing incident affecting your customer-facing applications. There is still no estimated time for a resolution of the outage. You are receiving emails from internal stakeholders who want updates on the outage, as well as emails from customers who want to know what is happening. You want to efficiently provide updates to everyone affected by the outage. What should you do?

• A.Focus on responding to internal stakeholders at least every 30 minutes. Commit to "next update" times.
• B.Provide periodic updates to all stakeholders in a timely manner. Commit to a "next update" time in all communications.
• C.Delegate the responding to internal stakeholder emails to another member of the Incident Response Team. Focus on providing responses directly to customers.
• D.Provide all internal stakeholder emails to the Incident Commander, and allow them to manage internal communications. Focus on providing responses directly to customers.

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You support an application running on GCP and want to configure SMS notifications to your team for the most critical alerts in Stackdriver Monitoring. You have already identified the alerting policies you want to configure this for. What should you do?

• A.Download and configure a third-party integration between Stackdriver Monitoring and an SMS gateway. Ensure that your team members add their SMS/phone numbers to the external tool.
• B.Select the Webhook notifications option for each alerting policy, and configure it to use a third-party integration tool. Ensure that your team members add their SMS/phone numbers to the external tool.
• C.Ensure that your team members set their SMS/phone numbers in their Stackdriver Profile. Select the SMS notification option for each alerting policy and then select the appropriate SMS/phone numbers from the list.
• D.Configure a Slack notification for each alerting policy. Set up a Slack-to-SMS integration to send SMS messages when Slack messages are received. Ensure that your team members add their SMS/phone numbers to the external integration.

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