Exam Guide: Developer - Associate

🏗️ Domain 1: Development with AWS Services

📘 Task 3: Use Data Stores In Application Development

DynamoDB dominates this task. The need to understand table design, key selection, indexing, consistency models, and how to write efficient queries is essential. As well as caching with ElastiCache and DAX. Plus specialized stores like OpenSearch.

📘 Concepts

DynamoDB Key Concepts

Primary Keys

Every table needs one. Two options:

Simple primary key: Partition key only (PK). Each item has a unique PK.

Composite primary key: Partition key (PK) + Sort key (SK). Multiple items can share a PK if they have different SKs.

Partition Key Selection

The partition key determines which physical partition stores your data.…