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What is the main purpose of a notification system on state change in software design?

easy🧠 Conceptual Q11 of Q15
LLD - Design — Online Shopping Cart
What is the main purpose of a notification system on state change in software design?
ATo inform interested components immediately when data changes
BTo store data permanently in a database
CTo increase the size of the application
DTo delay updates until the user refreshes manually
Step-by-Step Solution
Solution:

  1. Step 1: Understand the role of notifications

    Notifications alert parts of a system or users when something important changes.

  2. Step 2: Identify the purpose of state change notifications

    They ensure components get updates immediately without waiting or manual refresh.

  3. Final Answer:

    To inform interested components immediately when data changes -> Option A

  4. Quick Check:

    Notification = Immediate update [OK]
Quick Trick: Notifications alert on change, not store or delay [OK]
Common Mistakes:
MISTAKES
  • Confusing notification with data storage
  • Thinking notifications delay updates
  • Assuming notifications increase app size

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