Question 1

Your service has an availability SLO of 99%. What could you use to monitor whether you are meeting it?

🟩 Uptime check
❌ Readiness probe
❌ Health check
❌ Liveness probe

Explanation:

An Uptime Check continuously monitors if your service is reachable from outside and tracks service availability, which is exactly what an SLO measures.

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Question 2

You want the cheapest Compute Engine VMs for test environments.

🟩 Preemptible machines
❌ Sole tenant nodes
❌ Committed use discount
❌ Sustained use discount

Explanation:

Preemptible VMs (Spot VMs) give up to 80%–90% cost savings and are perfect for test environments where downtime is acceptable.

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Question 3

You want to send a small portion of real production traffic to a new version.

🟩 Canary deployment
❌ Rolling update
❌ Blue/green deployment
❌ A/B testing

Explanation:

A canary deployment sends a small percentage of traffic to the new version to verify safety before full rollout.

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Question 4

You want to deploy a fix with no downtime.

🟩 Rolling update
❌ Blue/green deployment
❌ Canary deployment
❌ A/B test

Explanation:

A rolling update replaces instances gradually, ensuring zero downtime while updating one portion of the service at a time.

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🧾 Summary Table

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