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

2988 questions.

Quiz

A consumer platform with 40 million accounts receives about 600 subject access requests a month. Honouring one means assembling a person's data from 23 services that each own their own store. Estimate what the manual path costs and say what changes the number by an order of magnitude.

A discovery platform builds personalisation from user behaviour. What privacy-engineering decisions must be made early, and which are expensive to retrofit?

Design the mechanism by which a deletion request propagates through a system with a warehouse, a search index, backups and three third-party processors.

Product wants to add "customers who bought this also bought" using purchase history. What does privacy by design require here?

A product lead at a super-app of Tencent/WeChat's shape says the new on-device keyboard model can ship without a consent flow because federated learning means the data never leaves the phone. You have ten minutes at the architecture review board. What do you say and what would you actually build?

A statistics team wants to publish counts from a sensitive dataset under differential privacy. Working from the way the US Census Bureau ran its 2020 disclosure avoidance system, estimate how the privacy budget constrains what can be published and which choice dominates the accuracy you end up with.

Two hospital groups want to measure whether a treatment pathway improves outcomes, using patient records neither may disclose to the other. The analysis needs per-patient linkage across both datasets. Which approach fits?

Two retailers want the size of their shared customer overlap and the average basket of that overlap group without either seeing the other's customer list. Which technique fits the requirement as stated?

What do privacy-enhancing technologies actually enable, and what do they cost in practice?

A logistics platform must integrate with warehouse systems, carrier networks and enterprise customers over private connectivity. What determines the choice between VPN, dedicated interconnect and public endpoints with allow-listing?

A regulated client requires that no traffic between their data centre and your SaaS platform traverses the public internet. Design the connectivity and justify the cost.

An enterprise needs its cloud workloads to reach on-premises databases with predictable latency and without traversing the public internet. What are the options and what do they actually guarantee?