Multi-Tenancy and Isolation

When a single AI system serves many customers (tenants), the cardinal rule is that no tenant may ever see another's data. In RAG this means every retrieval is scoped by tenant so the vector search cannot return another tenant's documents; the same scoping reaches caches, logs, fine-tunes, and rate limits. The dangerous failure is a cross-tenant leak. AI, ML, and GenAI interviews probe it because enterprise deployments are multi-tenant, and a leak between customers is a catastrophic, trust-destroying breach.