Interview prompt
Problem context
A shared analytics service has 8,000 tenants. One large tenant runs bursty queries that expand into thousands of subtasks, consuming worker memory and delaying all queues. Enterprise contracts prohibit long outages, but the business cannot afford fully dedicated infrastructure for every customer.
Skills being evaluated
fair schedulingresource isolationnoisy-neighbor controltenant economics
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Clarify the decision
Establish scale assumptions
Functional and non-functional requirements
High-level architecture
Data model and flow
Consistency and transaction boundaries
Failure modes and recovery
Security and privacy
Observability and SLOs
Capacity and cost
Alternatives and trade-offs
Evolution and migration
What Staff and Principal candidates should emphasize