What is the main difference between a Local Secondary Index (LSI) and a Global Secondary Index (GSI) in DynamoDB?

easy📝 Conceptual Q11 of 15

AWS - DynamoDB

ALSI can have a different partition key, but GSI must use the main table's partition key.

BLSI uses the same partition key as the main table, but GSI can use a different partition key.

CLSI and GSI both require the same partition and sort keys as the main table.

DLSI is only for read operations, while GSI is only for write operations.

Step-by-Step Solution

Solution:

Step 1: Understand LSI key structure
LSI shares the same partition key as the main table but allows a different sort key.
Step 2: Understand GSI key structure
GSI can have a completely different partition key and sort key from the main table.
Final Answer:
LSI uses the same partition key as the main table, but GSI can use a different partition key. -> Option B
Quick Check:
LSI shares partition key, GSI can differ [OK]

Quick Trick: LSI shares partition key; GSI can change both keys [OK]

Common Mistakes:

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