Google ACE Deploying and Implementing a Cloud Solution Practice Question
A team wants to use Cloud Run to deploy a container that processes messages from a Pub/Sub topic. The container is stateless and the workload is expected to have irregular traffic spikes with high concurrency. Which scaling configuration is most appropriate?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set min-instances to 0 and max-instances to 100 with concurrency of 80
Cloud Run can set a maximum number of concurrent requests per container instance. For Pub/Sub processing, setting max-instances can control cost, and the CPU is always allocated during request processing. The key is to allow multiple concurrent requests to handle spikes efficiently.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set min-instances to 0 and max-instances to 1000 with concurrency of 1
Why it's wrong here
Concurrency 1 is inefficient for high concurrency workloads.
- ✓
Set min-instances to 0 and max-instances to 100 with concurrency of 80
Why this is correct
Min-instances 0 allows scaling to zero when idle, max 100 handles spikes, high concurrency maximizes throughput.
- ✗
Set min-instances to 10 and max-instances to 100 with concurrency of 1
Why it's wrong here
Min 10 keeps instances running even when idle, increasing cost; concurrency 1 is inefficient.
- ✗
Set min-instances to 1 and max-instances to 100 with concurrency of 1
Why it's wrong here
Concurrency 1 means each instance handles one request at a time, inefficient for high concurrency.
Go deeper
Related to this question
Learn chapter
Google Cloud Platform Overview
Key term
Pub/Sub
Pub/Sub is a messaging pattern where publishers send messages without knowing who receives them, and subscribers receive only the messages they care about.
Key term
Cloud Run
Cloud Run is a fully managed compute platform from Google Cloud that lets you run containerized applications in a serverless environment, automatically scaling from zero to thousands of requests.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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