Quiz: What is the core architectural principle of a microservice in distributed systems?
Microservices emphasize loose coupling , high cohesion , bounded contexts, and independent database ownership per service.
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Microservices emphasize loose coupling , high cohesion , bounded contexts, and independent database ownership per service.
An Idempotency Key allows servers to identify and replay cached outcomes for network timeouts or retries, preventing duplicate mutations.
Dependency caching avoids re-downloading unchanged libraries on every workflow invocation.
The Saga Pattern manages distributed transactions as a series of local transactions, executing compensating transactions if any step fails.
Distributed Tracing propagates a canonical Trace ID across service boundaries in context headers, stitching together individual service Spans …
2>&1 duplicates file descriptor 2 (stderr) to file descriptor 1 (stdout), combining error logs with standard output.
Docker executes Dockerfile commands sequentially and checks its build cache; if a layer changes (e.g. COPY . ), all following layers must be rebuilt .
AWS Secrets Manager provides built-in automatic rotation workflows (using Lambda) for database and API credentials.