Quiz

2667 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 areas2667 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture78 Reliability & Resilience88 Observability81 Performance & Capacity Engineering90 Security Architecture95 Cost Architecture & FinOps92 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization92 AI-Era Architecture86 Software Architecture & Engineering84 Architecture Patterns84 Architecture Decision-Making91 The Architect's Meta-Skills92 Delivery & Release Engineering93 Platform Engineering & Developer Experience92 Testing & Quality Architecture90 Data Platform Architecture88 Streaming & Real-Time Data93 Data Governance & Semantics81 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk88

Difficulty Any beginner intermediate advanced

993 questions.

Quiz

You are designing APIs for a platform with a web app, a mobile app, internal service-to-service traffic and third-party partners. What do you expose, and where?

A platform's API is used more heavily than its web interface, and third-party tools built on it drive most adoption. What changes when the API is treated as the primary product rather than as an access mechanism?

How do you know it is safe to remove a field from a public API, and what would you have needed to build to know that?

A marketplace of eBay's kind ranks its feed per user and re-ranks continuously as listings end and prices change, so an item's position can move within seconds. Users scroll infinitely on mobile. Which pagination approach should the API use?

A mobile client makes eleven requests to render one screen. What is the architectural problem, and what are the options?

A mobile screen makes six sequential API calls and takes two seconds on a good connection. What are your options?

Your mobile app's API has 14 versions in the field, the oldest three years old. Product wants to remove support. How do you decide?

When does APM tell you something that distributed tracing and metrics cannot?

You inherit an estate of 300 applications. What do you record about each and what decision does it support?

A fast-growing company has dozens of internal applications of unknown value. How should the portfolio be assessed, and what decisions should follow?

An enterprise has an application portfolio of several hundred systems and cannot decide what to retire. What analysis makes the decision tractable?

You inherit 300 applications and are asked which to retire first. Estimate what a single low-traffic internal application costs the organisation per year, and say which part of that number should drive the retirement order.