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System Design Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
medium
System Design
Three independent services (inventory, email, analytics) each need to react to every 'order placed' event. What pattern fits?
A
A single point-to-point queue shared by all three
B
Publish/subscribe — the event is published once, and each service's own subscription receives its own independent copy
C
Vertical scaling
D
A single database transaction
Check Answer