Configure Backstage CBA Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A team has installed a community plugin called 'tech-radar' that requires a configuration block under the top-level key 'techRadar'. The team also uses a custom plugin that reads the same 'techRadar' key. They want the community plugin's default settings to apply, but the custom plugin needs a specific 'enableExperimental' flag set to true. How should they structure the configuration?

   • ADefine a single 'techRadar' block with all settings, including 'enableExperimental: true', and let both plugins read from the same merged configuration.
   • BUse a YAML anchor to duplicate the 'techRadar' block under two different top-level keys.
   • CCreate two separate top-level keys: 'techRadar' for the community plugin and 'techRadarCustom' for the custom plugin.
   • DPlace the 'enableExperimental' flag in the custom plugin's own configuration block, not under 'techRadar'.
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2. 7expert · medium

   After a configuration change, the Backstage frontend fails to load with the error: 'Invalid configuration: app.baseUrl is required'. The team has verified that app-config.yaml contains 'app.baseUrl'. What is the most likely cause?

   • AThe app.baseUrl value is set to an invalid URL format.
   • BThe frontend is loading a different configuration file that does not include the app.baseUrl key.
   • CThe app.baseUrl key is misspelled in the configuration file.
   • DThe backend is not running, so the frontend cannot fetch the configuration.
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4. 8application · medium

   An organization uses GitHub Enterprise for its source control and wants to integrate it with Backstage so that the catalog can ingest repositories. The integration requires an API token. The security team mandates that no token may appear in any committed configuration file. Which configuration approach meets the requirement?

   • ASet the token in the integration block using ${GITHUB_TOKEN} and export the GITHUB_TOKEN environment variable in the deployment environment.
   • BHardcode the token in app-config.yaml and restrict repository access to the Backstage team.
   • CPlace the token in app-config.local.yaml and add it to .gitignore.
   • DStore the token in the Backstage database and reference it from the integration block.
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5. 9application · medium

   A developer reports that a custom plugin's configuration in app-config.yaml is being ignored. The plugin expects a top-level key 'myPlugin' with a nested 'enabled' boolean. The developer has verified the YAML is valid. Which step should you take first to diagnose the issue?

   • ACheck the plugin's source code to confirm the exact configuration key name and structure.
   • BRun backstage-cli config:check to validate the configuration against the schema and inspect the merged output.
   • CRestart the Backstage backend process to force a reload of the configuration files.
   • DMove the plugin configuration block to the top of the app-config.yaml file to ensure it is parsed first.
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6. 10foundation · easy

   What is the primary purpose of the app-config.yaml file in a Backstage instance?

   • ATo define the runtime behavior of the Backstage backend, including database connections and authentication providers
   • BTo manage user permissions and access control lists for the Backstage portal
   • CTo serve as the central configuration file that customizes the Backstage instance, including app metadata, integrations, and plugin settings
   • DTo store the source code for custom plugins and frontend components
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