Hard Design: Notification System

What is 'notification deduplication window' and why is it important?

— Tests your understanding of this concept.

Answer Options

A Time window to collect notifications before batching

B Period during which the same notification_id is considered duplicate and rejected

C Window during which users can delete notifications

D Time period for A/B test measurement

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This question is from the Design: Notification System topic (System Design Cases).

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