Describe the Tenets of the "12-Factor App" 350-901 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   In the 12-factor app methodology, what are the three distinct stages in the deployment pipeline?

   • ACode, Package, Execute
   • BDevelop, Stage, Production
   • CBuild, Release, Run
   • DCompile, Test, Deploy
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2. 22application · medium

   A team needs to run a database migration for their production application. The migration script is part of the application's codebase and must run against the production database. The team wants to follow 12-factor principles. How should they run the migration?

   • ARun the migration script from a developer's laptop using a VPN connection to the production database.
   • BCreate a separate migration service that runs on a schedule and applies pending migrations automatically.
   • CSSH into the production server and run the migration script manually from the application directory.
   • DRun the migration as a one-off process in the production environment, using the same release artifact and configuration as the running app.
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4. 23foundation · easy

   In the 12-factor app methodology, how are backing services (e.g., databases, message queues) treated?

   • AAs resources that are managed by the application itself.
   • BAs attached resources accessed via a URL or locator.
   • CAs integral parts of the application code.
   • DAs resources that must be installed on the same server as the app.
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5. 24application · medium

   A team uses a CI/CD pipeline to deploy a Java application. Currently, the pipeline compiles the code, runs tests, packages a JAR, and then in the same stage copies the JAR to a server and restarts the service. A new team member suggests splitting this into separate build, release, and run stages. What is the primary benefit of this separation?

   • AIt allows the build stage to run faster by skipping tests when only documentation changes.
   • BIt enables rolling back to a previous release by redeploying an old release artifact without rebuilding the code.
   • CIt eliminates the need for a configuration management tool because all stages use the same environment variables.
   • DIt reduces the number of servers needed because the build and run stages can share the same machine.
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6. 25foundation · easy

   Which practice aligns with the dev/prod parity principle?

   • ADeploying code to production without testing in staging.
   • BUsing a lightweight database in development to save resources.
   • CUsing the same type of database in development and production.
   • DUsing different operating systems in development and production.
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