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DC-TE-2026-27
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An e-commerce order requires Payment and Inventory operations. Each service has its own database, so a single ACID transaction cannot cover the entire process. Which pattern is appropriate?
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In the Database-per-Service pattern, who owns the data?
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In Kubernetes, what component is responsible for maintaining the desired state of pods, ensuring crashed containers are restarted automatically?
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A reporting service needs to run complex read queries across multiple microservices without overloading the transactional write databases. Which pattern solves this requirement?
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A new version of Payment Service is deployed, but initially only 1% of production traffic is sent to it. The team monitors errors and latency before increasing traffic. What deployment strategy is this?
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In the context of microservice observability, what are the three fundamental pillars?
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Payment Service is temporarily unavailable. Order Service keeps calling it repeatedly, causing more failures. Which pattern can help prevent this situation?
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In Event Sourcing, how is the state of a business entity persisted?
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A service modifies its database and must reliably publish an event to a message broker without risking data inconsistency if the network fails. Which pattern guarantees this?
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How does the Sidecar Pattern support microservices running in a Kubernetes pod?
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