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2908 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 areas2908 Architecture Fundamentals91 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture87 Reliability & Resilience99 Observability92 Performance & Capacity Engineering100 Security Architecture95 Cost Architecture & FinOps102 Business Architecture103 Architecture Communication102 Enterprise Architecture100 Legacy Modernization92 AI-Era Architecture96 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

5 questions in Edge Data Consistency.

  1. Edge Data Consistency advanced

    A mobility platform wants to place data close to users in many regions. Which data can be replicated and which cannot?

    2 min answer olafly-ioedgereplication
  2. Edge Data Consistency advanced

    A social platform serves user profiles from edge caches worldwide. A user updates their profile and still sees the old one. How should this be handled?

    1 min answer edgeconsistencyinvalidationread-your-writes
  3. Edge Data Consistency advanced

    After a price change you issue a CDN purge and every point of presence returns 200. Twenty minutes later customers in one region still see the old price, and a hard refresh fixes it for some of them. Where do you look and in what order?

    2 min answer cdnpurgecache-variantsvary
  4. Edge Data Consistency intermediate

    Review this design. A streaming platform resolves three things in an edge function on every playback request: the active feature-flag set written from CI and read 200000 times a second; the regional price shown in the paywall; and whether this account's subscription is still active. All three live in a globally replicated edge key-value store with roughly 10-second propagation, writable from any location with last-writer-wins. What would you remove, what would you change, and what would you leave alone?

    3 min answer edge-data-consistencyreplicationentitlementsigned-tokens
  5. Edge Data Consistency advanced

    You enforce a rate limit of 100 requests per minute per user at the edge, across 40 locations. Abuse monitoring shows a user making 3,000. Explain.

    2 min answer edgerate-limitingconsistency