Integration Patterns and Messaging Systems Questions
Understand approaches to integrating different systems: synchronous APIs, asynchronous messaging (queues, topics, events), batch processing, and data synchronization. Know when to use message queues vs. publish-subscribe vs. event streams. Understand the reliability patterns (acknowledgments, retries, dead-letter queues) and consistency implications. Know about API gateways, service discovery, and orchestration. Discuss trade-offs between tight coupling and loose coupling, and how integration choices affect system resilience.
MediumTechnical
66 practiced
Describe the difference between at-least-once, at-most-once, and exactly-once delivery semantics in messaging systems. Give an example of a use case for each and how to implement/approximate it in a typical broker like RabbitMQ or Kafka.
HardTechnical
102 practiced
A partner requires guaranteed exactly-once processing semantics for invoicing messages. Discuss practical ways to approximate exactly-once in a distributed system and the trade-offs (performance, complexity). Reference deduplication stores, idempotent consumers, and transactional outbox or Kafka transactions.
MediumSystem Design
68 practiced
A shopping platform must synchronize product data between a central system and dozens of geographically distributed storefronts. Discuss architectural patterns (push, pull, event-driven replication, batch). Recommend a design that balances latency, bandwidth costs, and eventual consistency.
MediumTechnical
68 practiced
Explain consumer-driven contracts (CDC) and how they differ from provider-driven contract testing. As a Solutions Architect, how would you implement CDC in a cross-team microservices environment to reduce integration breakages?
MediumSystem Design
67 practiced
Design an error handling and dead-letter strategy for a multi-tenant messaging system where some tenants produce malformed messages intermittently. Specify how you isolate tenant failures, provide visibility, and allow for message replay after fixes.
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