[Solved] Why does DynamoDB SDK return a LastEvaluatedKey instead of a page number for pagination? - Ans: Because DynamoDB uses key-based pagination to handle large datasets efficiently | DynamoDB

DynamoDB - with AWS SDK

Why does DynamoDB SDK return a LastEvaluatedKey instead of a page number for pagination?

ABecause LastEvaluatedKey sorts the results automatically

BBecause page numbers are not supported in any database

CBecause it is easier to implement on the client side

DBecause DynamoDB uses key-based pagination to handle large datasets efficiently

Step-by-Step Solution

Solution:

Step 1: Understand DynamoDB pagination method
DynamoDB uses key-based pagination with LastEvaluatedKey to efficiently continue queries without scanning all data.
Step 2: Compare with page number approach
Page numbers require counting and skipping items which is inefficient for large distributed datasets.
Final Answer:
Because DynamoDB uses key-based pagination to handle large datasets efficiently -> Option D
Quick Check:
Key-based pagination = LastEvaluatedKey usage [OK]

Quick Trick: DynamoDB uses key-based pagination, not page numbers [OK]

Common Mistakes:

MISTAKES

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Why does DynamoDB SDK return a LastEvaluatedKey instead of a page number for pagination?