Describe the Tenets of the "12-Factor App" 350-901 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   In a 12-factor app, how does the app expose its services to the outside world?

   • ABy relying on an external web server like Apache or Nginx.
   • BBy using a message queue to receive requests.
   • CBy embedding a web server in the app that listens on a port.
   • DBy writing to a shared file system that is served by a web server.
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2. 17foundation · easy

   According to the 12-factor app methodology, how should dependencies be handled?

   • ADependencies should be implicitly available through the runtime environment.
   • BDependencies should be installed globally on the host system to be shared across apps.
   • CDependencies should be declared explicitly and isolated from the application's code.
   • DDependencies should be vendored into the codebase to avoid external downloads.
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4. 18foundation · easy

   In a 12-factor app, where should configuration data (such as database URLs and API keys) be stored?

   • AIn a central configuration server that the app queries at runtime.
   • BIn the application code as constants.
   • CIn environment variables.
   • DIn configuration files that are part of the codebase.
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5. 19foundation · medium

   A team maintains a 12-factor application. The application is currently deployed in three environments: development, staging, and production. Each environment uses the same Git repository, but the team has created a separate branch for each environment to manage environment-specific changes. According to the 12-factor app methodology, which statement accurately describes the correct relationship between codebase and deployments?

   • AA single codebase can be deployed to multiple environments, and environment-specific differences should be handled through configuration, not through separate branches.
   • BA single codebase is required, but each deployment must use a different version control system to avoid conflicts.
   • CThe development environment can use a separate codebase, but staging and production must share one codebase to ensure consistency.
   • DEach deployment must have its own codebase to isolate environment-specific changes, so three branches are appropriate.
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6. 20foundation · easy

   What is the primary scaling model for a 12-factor app?

   • AVertical scaling by increasing the resources of a single server.
   • BScaling by using a more powerful database.
   • CHorizontal scaling by adding more process instances.
   • DScaling by increasing the number of threads per process.
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