A user has a non-relational key-value database. The user is looking for a fully managed AWS service that will offload the administrative burdens of operating and scaling distributed databases. The…

Question

Options

• ACreate an Amazon DynamoDB table with provisioned capacity mode
• BCreate an Amazon DocumentDB cluster
• CCreate an Amazon DynamoDB table with on-demand capacity mode
• DCreate an Amazon Aurora Serverless DB cluster

• A
  3% (1)
• B
  14% (4)
• C
  79% (23)
• D
  3% (1)

Explanation

Explanation

Amazon DynamoDB with on-demand capacity mode is the ideal choice because it is a fully managed, serverless key-value (and document) NoSQL database that automatically scales to handle unpredictable traffic without requiring capacity planning - you only pay per request, making it highly cost-effective for variable workloads.

Why the distractors are wrong:

• Option A (DynamoDB Provisioned Capacity): While DynamoDB is the right service, provisioned mode requires you to specify read/write capacity units in advance, making it poorly suited and potentially costly for unpredictable traffic patterns.
• Option B (Amazon DocumentDB): DocumentDB is a document database (MongoDB-compatible), not a key-value store, and it is not serverless - it requires managing cluster instances, adding administrative overhead.
• Option D (Amazon Aurora Serverless): Aurora is a relational (SQL) database, which directly contradicts the requirement for a non-relational key-value database.

Memory Tip

Think of it this way: "Unpredictable traffic = On-Demand" - whenever an exam question mentions unpredictable, spiky, or variable workloads combined with cost-effectiveness, always lean toward on-demand/serverless options. DynamoDB is AWS's go-to key-value NoSQL managed service, so pair those two concepts together to lock in the answer.

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