[Solved] Why does Firestore require document IDs to be unique within a collection? — Ans: To uniquely identify each document for retrieval and updates | GCP

GCP - Cloud Firestore and Bigtable

Why does Firestore require document IDs to be unique within a collection?

ATo allow multiple documents with the same data

BTo uniquely identify each document for retrieval and updates

CTo limit the number of documents in a collection

DTo enforce security rules automatically

Step-by-Step Solution

Solution:

Step 1: Understand document ID role
Document IDs uniquely identify documents within a collection.
Step 2: Explain importance
Unique IDs allow Firestore to retrieve, update, or delete specific documents reliably.
Final Answer:
To uniquely identify each document for retrieval and updates -> Option B
Quick Check:
Unique IDs enable document identification [OK]

Quick Trick: Unique IDs identify documents for operations [OK]

Common Mistakes:

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Why does Firestore require document IDs to be unique within a collection?