What it means
The service choice affects consistency, scaling, query behavior, backup, encryption, maintenance, portability, and the division of operational responsibilities.
Why it matters
Selecting a database from familiarity alone can produce weak availability, unexpected cost, or security features that do not fit the data and access model.
Practical focus
- Choose a data model from workload access patterns
- Define identity, network, encryption, backup, and audit requirements
- Test failure, scaling, and restoration behavior
Common mistakes
- Exposing database endpoints publicly
- Assuming managed means fully secured
- Using administrator credentials in applications
Certification relevance
This subject appears in or supports the following certification bodies of knowledge: