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Quiz

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

2 questions in Sidecar & Ambassador.

  1. Sidecar & Ambassador advanced

    A payments service adds a connection-pooling ambassador beside every pod. After rollout the database's connection count falls from 1800 to 120 and its CPU drops 30%, but p99 time-to-commit rises from 90 ms to 210 ms while p50 is unchanged at 12 ms. The ambassador logs no errors and sits at 8% CPU. Where is the time going, and what do you change first?

    3 min answer ambassadorconnection-poolingqueueingtail-latency
  2. Sidecar & Ambassador advanced

    A platform moves cross-cutting concerns into a sidecar process alongside every service. What does this solve, and what new problems appear?

    2 min answer sidecarcross-cuttingpolyglotoverhead