3.3 Mitigating Incident Impact on Users PROFESSIONAL-CLOUD-DEVOPS-ENGINEER Practice Questions (Page 4)

Questions 16–20

1. 16expert · hard

   A company runs a service in us-central1. They want to add a secondary region, europe-west1, to improve availability. They have set up a global load balancer with backends in both regions. They want to ensure that users are served from the closest region. What is the best way to configure the load balancer?

   • AUse a global load balancer with a routing policy that directs users to the nearest healthy backend.
   • BUse a feature flag to redirect users to the secondary region.
   • CSet the traffic weight to 50/50 between the two regions.
   • DUse a regional load balancer in each region and rely on DNS to route users.
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   During an incident, a team wants to redirect a portion of user traffic to a different backend to test its stability. Which method is most appropriate for this scenario?

   • AChange the DNS record to point all traffic to the new backend.
   • BUpdate the instance group's autoscaling policy to add more instances.
   • CUse a load balancer's traffic splitting feature to route a percentage of requests to the new backend.
   • DStop the current backend and let the load balancer automatically fail over.
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   A service is experiencing increased latency due to a sudden spike in traffic. Which Google Cloud feature can automatically add compute capacity to handle the load?

   • ACloud CDN caching
   • BCloud DNS
   • CManaged instance group autoscaling
   • DCloud Load Balancing
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   A DevOps engineer needs to remove a Compute Engine instance from serving traffic without dropping in-flight user requests. Which action best achieves this?

   • AChange the instance's firewall rules to block all incoming traffic.
   • BStop the instance immediately and delete its static IP address.
   • CRemove the instance from the instance group and immediately delete it.
   • DSet the instance's health check to 'unhealthy' and wait for the load balancer to stop sending new requests while existing connections complete.
   Reveal Solution Discussion Select an answer first
6. 20application · medium

   A global e-commerce site uses a global external HTTP(S) load balancer with backends in us-central1 and europe-west1. A database issue in us-central1 is causing increased latency for users in North America. The team wants to immediately reduce the impact on users while they fix the database. What should they do?

   • ASet the us-central1 backend's capacity to 0 in the load balancer configuration.
   • BAdd more instances to the us-central1 backend.
   • CDelete the us-central1 backend service.
   • DChange the load balancing scheme to internal.
   Reveal Solution Discussion Select an answer first