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Why is it important to design an order tracking state machine with explicit allowed transitions rather than allowing any state change?

hard🧠 Conceptual Q10 of Q15
LLD - Design — Food Delivery System
Why is it important to design an order tracking state machine with explicit allowed transitions rather than allowing any state change?
ATo prevent invalid order states and ensure data consistency
BTo make the system slower and less responsive
CTo allow users to change order status arbitrarily
DTo reduce the number of states in the system
Step-by-Step Solution
Solution:
  1. Step 1: Understand the role of allowed transitions

    Explicit transitions enforce valid order progressions and prevent errors.
  2. Step 2: Consider consequences of allowing any state change

    Allowing arbitrary changes risks inconsistent or impossible order states, harming data integrity.
  3. Final Answer:

    To prevent invalid order states and ensure data consistency -> Option A
  4. Quick Check:

    Explicit transitions maintain order integrity [OK]
Quick Trick: Allowed transitions keep order data consistent [OK]
Common Mistakes:
MISTAKES
  • Thinking flexibility improves correctness
  • Assuming fewer states means better design
  • Confusing user control with system control

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