Play Store submission in Flutter - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding the Play Store App Signing

Which statement correctly describes the Play Store app signing process for Flutter apps?

A Google manages the app signing key and signs the app after you upload the APK or AAB.

B You must always sign the app manually before uploading; Google does not handle signing.

C Flutter apps do not require signing for Play Store submission.

D The app signing key is generated automatically by Flutter and cannot be changed.

💡 Hint

Think about who manages the security keys after upload.

Google Play offers app signing by Google Play, where Google manages the signing key securely and signs your app after you upload it. This is recommended for Flutter apps as well.

❓ ui_behavior

intermediate

Behavior of Version Code in Play Store

What happens if you upload a Flutter app bundle with a versionCode that is lower than the one already published on the Play Store?

A The Play Store accepts the upload and overwrites the existing app version.

B The Play Store rejects the upload with an error about versionCode being lower.

C The Play Store automatically increments the versionCode to the next number.

D The Play Store publishes the app but users see a warning about the version.

💡 Hint

Consider how versioning prevents accidental overwrites.

The Play Store requires each new upload to have a strictly higher versionCode than the previous one. If it is lower or equal, the upload is rejected.

❓ lifecycle

advanced

Effect of Changing Package Name After Upload

What is the effect of changing the package name (applicationId) of a Flutter app after it has been published on the Play Store?

A The Play Store blocks the upload due to package name change.

B The Play Store merges the new package with the old one automatically.

C Users receive an update notification for the app with the new package name.

D It is treated as a new app; users cannot update the old app with the new package name.

💡 Hint

Think about how the Play Store identifies apps uniquely.

The package name uniquely identifies an app on the Play Store. Changing it creates a new app entry, so users cannot update the old app with the new one.

❓ navigation

advanced

Play Store Release Track Behavior

If you upload a Flutter app bundle to the Play Store's internal testing track, what is the expected behavior for users in the production track?

A Production users continue using the production version; internal testing users get the new build.

B All users immediately get the internal testing version.

C The Play Store merges internal testing and production versions automatically.

D Production users see an error when opening the app until internal testing ends.

💡 Hint

Consider how release tracks isolate user groups.

Internal testing track releases are only available to testers added to that track. Production users continue using the stable production version.

📝 Syntax

expert

Correct Gradle Configuration for Play Store Signing

Which Gradle snippet correctly configures signing for a Flutter app to upload to the Play Store with a release build?

Flutter

android {
  signingConfigs {
    release {
      storeFile file('my-release-key.jks')
      storePassword 'storepass'
      keyAlias 'keyalias'
      keyPassword 'keypass'
    }
  }
  buildTypes {
    release {
      signingConfig signingConfigs.release
      minifyEnabled false
      shrinkResources false
    }
  }
}

A The snippet is missing the signingConfig assignment inside buildTypes.release.

B The snippet uses incorrect property names like keyStoreFile instead of storeFile.

C The snippet correctly sets signingConfig for release and references the keystore file and passwords properly.

D The snippet should set minifyEnabled true for Play Store release builds.

💡 Hint

Check if signingConfig is properly assigned and property names are correct.

The snippet correctly assigns signingConfig.release inside buildTypes.release and uses correct property names for keystore configuration.

Practice

1. What is the first step to prepare your Flutter app for Play Store submission?

easy

A. Build the app bundle using flutter build appbundle

B. Upload the APK directly without building

C. Fill app details before building the app

D. Wait for Google review before uploading

Solution

1. Step 1: Understand Flutter app packaging

   Flutter apps must be built into an app bundle for Play Store submission using flutter build appbundle.

2. Step 2: Identify the correct first action

   Building the app bundle is the first step before uploading or filling details.

3. Final Answer:

   Build the app bundle using flutter build appbundle -> Option A

4. Quick Check:

   Build app bundle = first step [OK]

Hint: Always build appbundle before uploading [OK]

Common Mistakes:

• Uploading APK without building appbundle
• Filling details before building
• Waiting for review before upload

2. Which Flutter command correctly builds an Android app bundle for Play Store?

easy

A. flutter build appbundle

B. flutter build apk

C. flutter run --release

D. flutter create appbundle

Solution

1. Step 1: Identify the command for app bundle

   The command flutter build appbundle builds the Android App Bundle (.aab) required by Play Store.

2. Step 2: Compare other commands

   flutter build apk builds APK, flutter run --release runs app, flutter create creates a new project.

3. Final Answer:

   flutter build appbundle -> Option A

4. Quick Check:

   App bundle command = flutter build appbundle [OK]

Hint: Use 'flutter build appbundle' for Play Store [OK]

Common Mistakes:

• Using flutter build apk instead of appbundle
• Confusing run and build commands
• Trying to create appbundle with flutter create

3. After running flutter build appbundle, what file type is generated for Play Store upload?

medium

A. .apk

B. .aab

C. .exe

D. .zip

Solution

1. Step 1: Understand output of flutter build appbundle

   This command generates an Android App Bundle file with extension .aab.

2. Step 2: Identify correct file type for Play Store

   Google Play requires .aab files for new app submissions, not APK or others.

3. Final Answer:

   .aab -> Option B

4. Quick Check:

   App bundle file = .aab [OK]

Hint: App bundle files end with .aab [OK]

Common Mistakes:

• Uploading .apk instead of .aab
• Confusing executable files with app bundles
• Trying to upload .zip files

4. You uploaded your Flutter app bundle but Google Play Console shows an error: "Missing required app details." What should you do?

medium

A. Rebuild the app bundle with flutter build apk

B. Wait for Google review without changes

C. Fill all required app details in Play Console before resubmitting

D. Upload the app bundle again without changes

Solution

1. Step 1: Understand the error message

   The error indicates missing app details, not a build or upload problem.

2. Step 2: Correct action to fix missing details

   You must fill all required app information in Play Console before resubmitting the app.

3. Final Answer:

   Fill all required app details in Play Console before resubmitting -> Option C

4. Quick Check:

   Missing details = fill info before resubmission [OK]

Hint: Complete all app info fields before submitting [OK]

Common Mistakes:

• Rebuilding app bundle instead of filling details
• Ignoring error and waiting
• Uploading same bundle without changes

5. You want to submit an update to your Flutter app on Play Store. Which sequence is correct?

hard

A. Fill app details -> flutter build appbundle -> Upload bundle -> Wait for review

B. Wait for review -> flutter build appbundle -> Upload bundle -> Fill app details

C. Upload bundle -> flutter build appbundle -> Fill app details -> Wait for review

D. flutter build appbundle -> Upload bundle -> Fill app details -> Wait for review

Solution

1. Step 1: Identify correct order for update submission

   First, build the app bundle with flutter build appbundle, then upload it to Play Console.

2. Step 2: Fill or update app details after uploading

   App details can be updated or confirmed after uploading the bundle, then wait for Google review.

3. Final Answer:

   flutter build appbundle -> Upload bundle -> Fill app details -> Wait for review -> Option D

4. Quick Check:

   Build -> Upload -> Fill details -> Review [OK]

Hint: Build first, then upload, fill details, wait [OK]

Common Mistakes:

• Filling details before building bundle
• Uploading before building
• Waiting for review before upload