Real World Scenario Based Decision Making Questions
Applying infrastructure knowledge to realistic business scenarios: handling traffic spikes, migrations from on-premises to cloud, optimizing costs during resource constraints, responding to security incidents, and managing infrastructure during rapid growth. Making trade-off decisions when constraints conflict.
MediumSystem Design
41 practiced
Design an architecture to meet RTO=15 minutes and RPO=5 minutes for a critical user-auth service in the cloud. Specify replication or backup strategies, failover automation, DNS and routing considerations, and the trade-offs (cost/complexity) of your design.
EasyTechnical
38 practiced
Describe Infrastructure as Code (IaC) and its main benefits. Compare two tools (Terraform and CloudFormation) on state management, modularity, and secret handling. Provide a short 5-item checklist you'd use to review a Terraform module before approving it for production.
EasyTechnical
44 practiced
Compare blue/green and canary deployment strategies. For a customer-facing payments service that must avoid transaction duplication and ensure rapid rollback, which strategy would you choose and why? Describe how traffic routing and rollback would be implemented and any additional safeguards you'd add.
HardTechnical
45 practiced
Your company must cut cloud spend by 40% in 90 days without removing core product functionality. Present a prioritized 90-day plan with measurable actions: quick wins, medium-term architectural changes, potential provider negotiations, and organizational processes. For each action, estimate savings, effort, and risks.
MediumSystem Design
35 practiced
How would you run stateful services that require sticky sessions and persistent storage in a horizontally scalable Kubernetes environment? Cover trade-offs between StatefulSets vs Deployments, session stores (Redis vs DB), persistent volume claims and storage classes, and strategies for scaling read vs write paths.
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