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GCP Professional Cloud Architect Practice Question

Your team manages a stateless containerized HTTP API that currently runs in a GKE Autopilot cluster. During promotional events, demand jumps from 50 requests per second to 15 000 within 30 seconds, then drops back to near-zero. The HPA cannot spin up pods fast enough, causing errors. The business wants to minimize operations, pay only for requests actually served, and keep the existing public HTTPS URL unchanged. What approach best meets these goals?

  • Deploy the code as a Cloud Function (1st gen), set the maximum number of function instances to 1000, and map the function to the existing domain.

  • Retain GKE but set an initial pod count of 2000 and enable node auto-provisioning with larger node pools to absorb bursts.

  • Migrate the container image to Cloud Run, configure a custom domain that matches the current URL, set min-instances to 0, and raise the service's max-instances quota to exceed the peak load.

  • Create a regional managed instance group running the container image on preemptible VMs, enable autoscaling based on 60 % CPU utilization, and front it with an external HTTP(S) load balancer using the current URL.

GCP Professional Cloud Architect
Designing and planning a cloud solution architecture
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