What are the biggest challenges with microservices?
Distributed data consistency, debugging across services, network failures, operational overhead, and team coordination. The challenges are real, not theoretical. The cost must be justified by scale and team autonomy.
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More FAQs in Monolith vs Microservices: Interview Questions and Answers
You incrementally replace parts of a monolith with new services. Old code is strangled (removed) as new services take over. Each step is shippable and reversible. It is the safe way to split a monolith.
No. Each service should own its data. Sharing databases couples services and defeats the purpose. If you need data from another service, use an API or event, not a direct query.
Use the saga pattern: each service does its part and publishes an event. If a step fails, compensating events undo prior steps. You accept eventual consistency instead of ACID transactions.
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