Topic 1 Question 225

Professional Cloud Developer

Topic 1 Question 225
Before promoting your new application code to production, you want to conduct testing across a variety of different users. Although this plan is risky, you want to test the new version of the application with production users and you want to control which users are forwarded to the new version of the application based on their operating system. If bugs are discovered in the new version, you want to roll back the newly deployed version of the application as quickly as possible.

What should you do?
- Deploy your application on Cloud Run. Use traffic splitting to direct a subset of user traffic to the new version based on the revision tag.
- Deploy your application on Google Kubernetes Engine with Anthos Service Mesh. Use traffic splitting to direct a subset of user traffic to the new version based on the user-agent header.
- Deploy your application on App Engine. Use traffic splitting to direct a subset of user traffic to the new version based on the IP address.
- Deploy your application on Compute Engine. Use Traffic Director to direct a subset of user traffic to the new version based on predefined weights.
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- 正解だと思う選択肢: B
  The requirement is "you want to control which users are forwarded to the new version of the application based on their operating system". https://cloud.google.com/traffic-director/docs/ingress-traffic#sending-traffic
  
  👍 3
  kisswd2022/12/04
- 正解だと思う選択肢: B
  The key point for this question is the last two word of this statement "you want to control which users are forwarded to the new version of the application based on their operating system". Operating system. Where could the developers find the OS for a certain user? That's the User-Agent header. Example of a header: Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/42.0.
  
  More info about the User-Agent header: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent
  👍 3
  x_cath2022/12/12
- 正解だと思う選択肢: C
  You can use traffic splitting to specify a percentage distribution of traffic across two or more of the versions within a service. Splitting traffic allows you to conduct A/B testing between your versions and provides control over the pace when rolling out features.
  
  https://cloud.google.com/appengine/docs/legacy/standard/python/splitting-traffic#ip_address_splitting Answer C
  
  👍 1
  TNT872022/12/01
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