LLD - Design — Online Shopping Cart
Why is it important for the Product class to be immutable in a system where Cart and Order classes reference Product objects?
Why is it important for the Product class to be immutable in a system where Cart and Order classes reference Product objects?
hard🧠 Conceptual Q10 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand immutability benefits
Immutable objects cannot be changed after creation, ensuring consistency.Step 2: Prevent side effects in Cart and Order
If Product changes, all carts and orders referencing it would see inconsistent data.Final Answer:
Immutability prevents accidental changes affecting all carts and orders -> Option BQuick Check:
Immutability = data consistency [OK]
Quick Trick: Immutable products keep data consistent across system [OK]
Common Mistakes:
MISTAKES- Confusing immutability with deletion
- Assuming immutability improves query speed
- Thinking immutability reduces memory
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