Can we keep application configuration at different places and what could be the consideration for choosing multiple places for doing so ?

Java - Interview Questions and Answers

Q1. Can we keep application configuration at different places and what could be the consideration for choosing multiple places for doing so ?

Design

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Ans. Yes an application can have configuration stored at multiple places. Factors that could facilitate such a design could be

1. Type of config information - We may have a case to store confidential information differently than other regular config value

2. Environment - We may like to have a base config ( defined in application package ) and then a different override mechanism in different environments.

3. Centralization - Sometime some configs need to be shared across application and hence centralized.

4. Testing - Testing against config may not be possible in some enviornments in certain cases and hence additional config store might be kept for testing purpose only.

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