You need to design an order state machine that supports Pending, Processing, Shipped, Delivered, and Cancelled states. Which design choice best ensures scalability and maintainability?

hard📝 Trade-off Q8 of 15

LLD - Design — Online Shopping Cart

You need to design an order state machine that supports Pending, Processing, Shipped, Delivered, and Cancelled states. Which design choice best ensures scalability and maintainability?

AImplement a state transition table with allowed moves

BUse a hardcoded if-else chain for state transitions

CAllow any state to transition to any other state

DStore states as strings without validation

Step-by-Step Solution

Solution:

Step 1: Evaluate design options for scalability
Hardcoded if-else is hard to maintain; allowing any transition is unsafe.
Step 2: Choose best practice
A transition table clearly defines allowed moves and is easy to update.
Final Answer:
Implement a state transition table with allowed moves -> Option A
Quick Check:
Scalable design = Transition table [OK]

Quick Trick: Use tables for clear, scalable transitions [OK]

Common Mistakes:

Hardcoding logic everywhere
Allowing invalid transitions
Ignoring validation

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You need to design an order state machine that supports Pending, Processing, Shipped, Delivered, and Cancelled states. Which design choice best ensures scalability and maintainability?

Step 1: Evaluate design options for scalability

Step 2: Choose best practice

Final Answer:

Quick Check:

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