Quiz

2627 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 areas2627 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture77 Networking86 API & Integration Architecture78 Reliability & Resilience88 Observability81 Performance & Capacity Engineering90 Security Architecture85 Cost Architecture & FinOps82 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization82 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

49 questions in Networking.

Quiz

You migrate a mobile API to HTTP/2 and p99 latency gets worse for users on cellular networks, while p50 improves. Explain and decide what to do.

A chat platform's Layer 7 proxy tier holds millions of WebSocket connections. Every proxy deployment disconnects everyone. What would you change?

One instance passes its health checks but serves requests ten times slower than its peers. Why is it still receiving traffic and what would you change?

A platform running thousands of concurrent isolated sessions starts seeing intermittent connection failures to external sites. Ports are available and CPU is low. What is the likely cause?

A service intermittently times out connecting to a managed database. The database is healthy, nothing changed, and failures correlate with traffic volume. Where do you look?

A blockchain infrastructure provider serves RPC requests where a small number of query types are enormously more expensive than the rest. How should the request path be structured?

An API platform serving millions of external developers must place authentication, rate limiting, quotas, retries, idempotency and tenant isolation. Which belong at the gateway and which must live deeper?

Your API gateway configuration has grown to 8,000 lines with request transformations and cross-service orchestration. Changes require a platform team ticket and take two weeks. How do you fix this?

A connected-vehicle fleet sends telemetry over unreliable mobile networks with limited bandwidth and intermittent connectivity. What protocol and session characteristics matter, and what is the wrong choice?

A global SaaS product has a 200 ms p95 API budget. Users in Sydney see 900 ms against a single US-East deployment. The application team says the service responds in 40 ms. Who is right and what do you do?

A search tier fans every query out to 60 shards and merges the replies. The merged p99 jumps from 40 ms to 240 ms, with a few requests at 440 ms. Shard CPU is flat, no individual shard's p99 moved, and the latency increments are almost exactly 200 ms. What failed?

A short-video platform finds that video startup time, not playback quality, is the strongest predictor of engagement. Which network-level optimisations matter most?