Why does a DynamoDB query operation require a partition key value but not necessarily a sort key value?

hard📝 Conceptual Q10 of 15

AWS - DynamoDB

Why does a DynamoDB query operation require a partition key value but not necessarily a sort key value?

APartition key is only used for indexing, sort key stores the data

BSort key is deprecated and no longer used

CPartition key defines the data partition; sort key is optional to filter within that partition

DQuery operation always requires both keys

Step-by-Step Solution

Solution:

Step 1: Understand partition and sort keys roles
The partition key determines the partition where data is stored; the sort key organizes data within that partition.
Step 2: Explain query requirements
A query must specify the partition key to locate the partition but can optionally filter by sort key.
Final Answer:
Partition key defines the data partition; sort key is optional to filter within that partition -> Option C
Quick Check:
Partition key required, sort key optional in query [OK]

Quick Trick: Partition key locates partition; sort key filters inside it [OK]

Common Mistakes:

MISTAKES

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