System Architecture Communication and Documentation Questions
Assess the candidate ability to describe, document, and communicate system architecture both visually and verbally. Candidates should present what a system does and who uses it, identify major components and how they interact, show data flow and integration points, and explain critical architectural decisions and trade offs. Interviewers expect clear diagrams using standard conventions that show high level views, component interactions, and deployment topology, accompanied by concise narrative documentation. Strong answers include multiple views tailored to the audience, labeled diagrams, and justification of design choices while avoiding unnecessary implementation detail. Candidates should be able to discuss scaling strategies, reliability and operational considerations including failure modes, migration paths, observability, and deployment considerations. The scope includes common architectural building blocks such as microservices, application programming interfaces, databases, caching layers, and message buses, as well as consistency and availability implications and service to service communication patterns, and the connection between technical choices and business context.
MediumTechnical
0 practiced
For an online retailer, propose microservice boundaries, list the primary APIs for each service (catalog, cart, checkout, payments, orders, shipping), and describe how you would document data ownership and cross-service interactions. Include how you would show asynchronous flows and eventual consistency in diagrams.
MediumTechnical
0 practiced
For systems that must comply with PCI/DSS or other regulations, what audit trails and logging policies should be present in architecture documentation? Describe where to collect logs, PII redaction points, encryption and retention policies, access controls, and include a small data-flow annotation showing where sensitive data is handled and where it is masked.
MediumTechnical
0 practiced
How would you document performance trade-offs for a latency-sensitive API that could either read-from-cache or perform a consistent database read? Include measurement plans, benchmarks to include in docs, representative SLAs, and a description of how you would present risk and cost trade-offs to stakeholders.
HardTechnical
0 practiced
When choosing between synchronous RPC and asynchronous messaging for a checkout payment flow, prepare a written justification you would include in architecture documentation. Address latency, consistency, developer experience, testing/debugging, operational complexity, failure modes, observability, and business SLAs. Make a recommendation and justify it.
MediumTechnical
0 practiced
In architecture documentation, how would you present cost implications of choices like multi-region writes, read replicas, cache sizing, and message retention policies? Describe the diagrams, annotated cost estimates, and trade-off tables you would include, and provide an example of a cost-saving alternative with impact analysis.
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