Android Development Android Security

Question 1

What is the purpose of declaring permissions in AndroidManifest.xml?

Accepted Answer

To declare what capabilities or data access the app requires

Answer

To hide the app from unauthorized users

Answer

To encrypt app data

Answer

To restrict other apps from running

Question 2

Which protection level requires the user to explicitly grant a permission at runtime?

Accepted Answer

dangerous

Answer

normal

Answer

signature

Answer

privileged

Question 3

Which Android API checks whether a runtime permission has been granted?

Accepted Answer

ContextCompat.checkSelfPermission()

Answer

ActivityCompat.requestPermissions()

Answer

PackageManager.hasPermission()

Answer

Permission.isGranted()

Question 4

What does ProGuard/R8 do in Android release builds?

Accepted Answer

Shrinks, obfuscates, and optimizes code

Answer

Encrypts APK resources

Answer

Signs the APK

Answer

Validates permissions

Question 5

What is the Android Keystore System used for?

Accepted Answer

To securely store cryptographic keys that cannot be extracted from the device

Answer

To manage user passwords

Answer

To store API keys in plaintext

Answer

To generate SSL certificates

Question 6

Which class is used to encrypt data using the Android Keystore in modern Android?

Accepted Answer

Cipher

Answer

KeyGenerator

Answer

EncryptionManager

Answer

SecretKeyFactory