Cost Optimization and Business Acumen Questions

Focuses on the financial and strategic aspects of cost management and how cost decisions affect business outcomes. Topics include Total Cost of Ownership analysis, CapEx versus OpEx trade offs, pricing and revenue levers, customer and product profitability, volume drivers, vendor negotiation, zero based budgeting, working capital optimization, process improvement for cost reduction, and methods to quantify return on investment for infrastructure and product decisions. Candidates should be able to present recommendations that balance cost, performance, and risk, and to communicate quantified impacts and implementation feasibility to business stakeholders.

HardSystem Design

85 practiced

A healthcare client must process PHI under strict compliance (HIPAA/GDPR) while reducing infrastructure costs. As Solutions Architect, recommend prioritized architecture options (e.g., encryption at rest/in transit, dedicated vs shared cloud tenancy, managed vs self-hosted services), estimate relative cost impacts, and explain risk mitigations to meet compliance without overspending.

HardTechnical

96 practiced

Quantify how to include environmental (carbon) costs into TCO for clients with sustainability KPIs. Describe data sources for carbon equivalents for compute and storage, how to convert carbon into a monetary cost (internal carbon price), and present an example of how adding a carbon cost changes the cost-benefit of cloud vs on-prem decisions.

MediumTechnical

95 practiced

Design an experiment to quantify the revenue impact of page load latency: current p95=1s; expected change to p95=2s. Describe the A/B or canary methodology, sample size considerations, metrics to collect (conversion, revenue per visit), how to translate conversion delta into ARR impact, and how to compute ROI for a performance investment.

MediumTechnical

138 practiced

Design a set of metrics and instrumentation to compute product-level and feature-level profitability. Describe data sources (billing, usage telemetry, infra costs), allocation rules for shared platform costs, and assumptions you must document. How would you present the margin per product to the executive team?

MediumSystem Design

95 practiced

A retail client expects traffic to triple during seasonal peaks. They require p95 latency < 100ms but want to minimize infrastructure spend. As the Solutions Architect, design an autoscaling and capacity plan that balances cost and performance. Include choices between reserved instances, spot instances, serverless functions, and caching strategies; describe monitoring and fallback mechanisms.

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