Advanced
Web & Software Development
Q81 / 100
What is the CQRS + Event Sourcing combination and its challenges?
Correct! Well done.
Incorrect.
The correct answer is B) Events are the source of truth (ES); commands mutate state by appending events; read models are projections of events (CQRS) — powerful but adds operational complexity
B
Correct Answer
Events are the source of truth (ES); commands mutate state by appending events; read models are projections of events (CQRS) — powerful but adds operational complexity
Explanation
ES+CQRS: append-only event store, project events to multiple read models optimized for different queries. Challenges: event schema evolution, eventual consistency lag, projection rebuilds, operational complexity.
Progress
81/100