According to the Twelve-Factor methodology, which changes should an Architect recommend?

At Universal Containers (UC), a developer named Yuichiro wrote a PHP application that, in production, uses a MySQL database. Yuichiro is onboarding Mary, a new UC developer, who is setting up her development environment.

Yuichiro asks Mary to:

1) install the related PHP libraries manually so the application will run;

2) use MongoDB, instead of MySQL, in the development environment.

According to the Twelve-Factor methodology, which changes should an Architect recommend?
A . Explicitly declare code dependencies in theapplication’s environment variables and use the same type of database in both development and production.
B . Persist code dependencies in the application’s production database. Use the same type of database locally to ensure that the dependencies are accessible.
C . Recursively determine code dependencies on application startup and maintain separate
Git branches for the MongoDB- and MySQL- compatible versions of the application.
D . Explicitly declare code dependencies in the application’s source and use thesame type of database in both development and production.

View Answer

Answer: B