DynamoDB - Access Patterns and Query Optimization
Which of the following is the correct way to define a primary key in DynamoDB to support a specific access pattern?
Which of the following is the correct way to define a primary key in DynamoDB to support a specific access pattern?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall DynamoDB primary key structure
Primary key can be simple (partition key only) or composite (partition + sort key).Step 2: Check which option uses valid composite key
PrimaryKey: { PartitionKey: 'UserId', SortKey: 'OrderId' }correctly defines partition key 'UserId' and sort key 'OrderId', matching common access patterns.Final Answer:
<code>PrimaryKey: { PartitionKey: 'UserId', SortKey: 'OrderId' }</code> -> Option DQuick Check:
Composite key needs PartitionKey + SortKey [OK]
Quick Trick: Primary key needs partition key; add sort key if needed [OK]
Common Mistakes:
MISTAKES- Using sort key without partition key
- Confusing attribute names for keys
- Defining only sort key without partition key
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