AAD Android Build System, Gradle & App Deployment 3

Question 1

When would you use `abiFilters` in an Android Gradle build configuration?

Accepted Answer

To specify which CPU architectures (e.g., arm64-v8a, x86) are included in the APK

Answer

To filter which Android API versions the app supports at runtime

Answer

To restrict which resource qualifiers are bundled in the APK

Answer

To limit which product flavors are assembled during a build

Question 2

Where should API keys and sensitive credentials be stored in an Android project to keep them out of source control?

Accepted Answer

In `local.properties` or environment variables, excluded from version control via `.gitignore`

Answer

Directly in `AndroidManifest.xml` for easy access at build time

Answer

In `strings.xml` so they can be easily localized per region

Answer

In a `buildConfigField` defined in `app/build.gradle` committed to the repo

Question 3

Which Gradle command runs unit tests for an Android project from the command line?

Accepted Answer

./gradlew test

Answer

./gradlew runTests

Answer

./gradlew check

Answer

./gradlew unitTest

Question 4

What is a 'product flavor' in Android Gradle?

Accepted Answer

A custom build configuration representing a different version of the app, such as free vs. paid

Answer

A visual theme configuration applied to the app's UI

Answer

A Kotlin language feature that alters code behavior per device type

Answer

A Gradle plugin variant for targeting different SDK versions

Question 5

What is the Gradle Wrapper (`gradlew`) and why is it important for Android projects?

Accepted Answer

A script that downloads and uses the exact Gradle version specified for the project

Answer

A GUI tool for visualizing Gradle task dependency graphs

Answer

A plugin that accelerates build times by caching task outputs remotely

Answer

A command-line tool for generating APK signing keystores

Question 6

What is the purpose of `manifestPlaceholders` in Gradle build configuration?

Accepted Answer

To inject build-variant-specific values into `AndroidManifest.xml` at build time

Answer

To define placeholder text displayed in the app's UI during loading screens

Answer

To list all permissions that require user approval at runtime

Answer

To configure placeholder activities used only during automated testing

Question 7

What is Gradle's default strategy when two modules depend on different versions of the same library?

Accepted Answer

It selects the newest requested version of the conflicting dependency automatically

Answer

It fails the build and requires the developer to manually specify the version

Answer

It uses the lowest version to maximize compatibility across modules

Answer

It includes both versions in the APK to satisfy all modules