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2988 questions of the kind that actually get asked — in interviews, in architecture review boards, and by the person who has to run the thing at 3 AM. Every answer states the trade-off rather than the slogan, and says when the obvious choice is the wrong one.

All areas2988 Architecture Fundamentals91 Distributed Systems111 Data Architecture100 Cloud Architecture97 Networking96 API & Integration Architecture97 Reliability & Resilience99 Observability92 Performance & Capacity Engineering100 Security Architecture105 Cost Architecture & FinOps102 Business Architecture103 Architecture Communication102 Enterprise Architecture100 Legacy Modernization102 AI-Era Architecture106 Software Architecture & Engineering93 Architecture Patterns94 Architecture Decision-Making101 The Architect's Meta-Skills102 Delivery & Release Engineering103 Platform Engineering & Developer Experience102 Testing & Quality Architecture102 Data Platform Architecture98 Streaming & Real-Time Data103 Data Governance & Semantics91 Frontend & Experience Architecture101 Edge, Mobile & IoT98 Regulatory & Data Protection Architecture99 Assurance, Audit & Model Risk98
Difficulty Any beginner intermediate advanced

3 questions in gRPC APIs.

  1. gRPC APIs advanced

    A gRPC client fleet calls a backend behind a layer-4 load balancer. After scaling the backend from 10 to 40 pods, the original 10 carry almost all the traffic and the new pods sit idle. Separately, calls have started failing with UNAVAILABLE after quiet periods. Diagnose both.

    3 min answer grpchttp2load balancingkeepalive
  2. gRPC APIs advanced

    A partial-update RPC takes the message and writes every field it contains. After a client release, support finds accounts whose discount percentage has become 0 and whose nickname has become empty, with no failed calls and no bad data in the client's logs. The protobuf definition uses plain proto3 scalars. Explain the failure.

    3 min answer protobuffield-presencepartial-updatefieldmask
  3. gRPC APIs advanced

    You must remove a field from a protobuf message used by dozens of deployed services. Walk through the safe sequence.

    2 min answer grpcprotobufschema-evolutioncompatibility