Design Cost-Optimized Architectures
Targeted SAA-C03 practice for this exam objective, with an explanation for every answer option.
- Certification
- SAA-C03
- Domain
- Design Cost-Optimized Architectures
- Questions
- 10
Practice SAA-C03 Design Cost-Optimized Architectures questions with exam-style scenarios, detailed explanations, and option-by-option rationale for this domain.
Example question from this objective
Each option is explained, so the reasoning behind the distractors is part of the answer.
A media service is comparing a DynamoDB table in on-demand capacity mode with a single-Region MemoryDB for Redis OSS cluster. Which TWO statements correctly describe current direct pricing considerations for these specific configurations?
- MemoryDB for Redis OSS receives Valkey's data-written allowance, so node-hours include its first 10 TB written each month.
- DynamoDB on-demand bills read and write request units without requiring provisioned read or write throughput.
- MemoryDB for Redis OSS bills node-hours and data written, plus snapshot storage beyond its included Regional allowance.
- DynamoDB provisioned mode bills only consumed read and write capacity, so unused provisioned capacity has no charge.
MemoryDB for Redis OSS receives Valkey's data-written allowance, so node-hours include its first 10 TB written each month. — MemoryDB pricing distinguishes the Valkey and Redis OSS engines. The advertised Valkey allowance for data written cannot be transferred to this Redis OSS estimate, whose data-written volume remains a direct pricing meter in addition to node-hours.
DynamoDB on-demand bills read and write request units without requiring provisioned read or write throughput. — DynamoDB on-demand automatically manages throughput capacity and bills reads and writes as request units. Storage and optional features can add other charges, but the customer does not reserve an hourly quantity of read or write capacity for this mode.
MemoryDB for Redis OSS bills node-hours and data written, plus snapshot storage beyond its included Regional allowance. — A MemoryDB for Redis OSS estimate includes the selected nodes for the time they run and the volume of data written. Snapshot storage up to the documented Regional allowance is included; storage beyond that allowance is a separate charge.
DynamoDB provisioned mode bills only consumed read and write capacity, so unused provisioned capacity has no charge. — DynamoDB provisioned capacity can be economical for steady, predictable traffic, but AWS bills the hourly read and write capacity that the customer provisions. Unused provisioned capacity therefore remains billable, unlike on-demand request-based throughput.