How would you combine an order tracking state machine with an event-driven architecture to improve scalability?

hard📝 Trade-off Q9 of 15

LLD - Design — Food Delivery System

APoll the database continuously to check for state changes

BEmbed all state logic inside a single monolithic service

CUse events to trigger state transitions asynchronously via message queues

DUse synchronous HTTP calls for every state transition

Step-by-Step Solution

Solution:

Step 1: Understand event-driven architecture benefits
It decouples components and handles tasks asynchronously, improving scalability.
Step 2: Apply this to state machine
Using message queues to trigger state changes allows distributed processing and better load handling.
Final Answer:
Use events to trigger state transitions asynchronously via message queues -> Option C
Quick Check:
Async events + queues = scalable state transitions [OK]

Quick Trick: Async events improve scalability in state machines [OK]

Common Mistakes:

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