Quiz

2741 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 areas2741 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture78 Reliability & Resilience99 Observability92 Performance & Capacity Engineering90 Security Architecture95 Cost Architecture & FinOps92 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization92 AI-Era Architecture96 Software Architecture & Engineering84 Architecture Patterns84 Architecture Decision-Making91 The Architect's Meta-Skills92 Delivery & Release Engineering93 Platform Engineering & Developer Experience92 Testing & Quality Architecture102 Data Platform Architecture98 Streaming & Real-Time Data93 Data Governance & Semantics91 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk98

Difficulty Any beginner intermediate advanced

2741 questions.

Quiz

A B2B marketplace splits into supplier-onboarding, catalogue, pricing and fulfilment services. Eighteen months later every meaningful feature requires all four teams. What does Conway's Law say happened, and what are the two available fixes?

Two teams own two deployables: a reader-facing API and a mobile backend-for-frontend that calls it. They are merged into one team of nine with one backlog and one standup. What happens to the interface between those two services over the next two quarters, and what would you do about it now?

What happens if an edge platform's configuration system is built by three teams - one owning the config language, one owning global propagation, one owning the edge runtime - and each team ships on its own schedule with its own API? Predict the architectural consequence.

You design service boundaries along domain lines. They cut across three existing teams. What happens and what do you do?

A commerce platform's field performance metrics are poor. Which improvements have the largest effect on conversion?

A commerce site's layout shift metric worsens sharply after a release and the team cannot reproduce it locally. How do you find it?

A single-page application scores well in the lab and users on mid-range Android phones say it is unusable. Diagnose.

Mobile conversion is 40% below desktop. Product blames the design; analytics shows users leaving before the page is usable. How do you investigate?

You want a 2.5 second largest contentful paint at the 75th percentile on mid-range Android over a typical mobile connection. Roughly how much JavaScript can you ship on the critical path, and which assumption dominates the error?

A customer reports an error at 14:32 yesterday. What must have been built for the investigation to take two minutes rather than two hours?

A logistics platform's request crosses synchronous services, message queues, scheduled batch jobs and third-party callbacks. Tracing works within services and breaks between them. What is missing?