LLD - Design — Food Delivery System
Which of the following is a valid state transition in a typical order tracking state machine?
Which of the following is a valid state transition in a typical order tracking state machine?
easy🧠 Conceptual Q2 of Q15
Step-by-Step Solution
Solution:
Step 1: Identify typical order states and transitions
Orders usually move forward: placed -> processing -> shipped -> delivered. Cancellation can happen after placing.Step 2: Check each option
From 'placed' to 'cancelled' is valid: an order can be cancelled after being placed. Other options reverse or skip states, which is invalid.Final Answer:
From 'placed' to 'cancelled' -> Option BQuick Check:
Valid order transition = placed to cancelled [OK]
Quick Trick: Orders move forward or cancel, not backward [OK]
Common Mistakes:
MISTAKES- Assuming orders can revert to earlier states
- Ignoring cancellation as a valid transition
- Confusing 'returned' with initial states
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