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

Declaring permissions in the manifest tells the Android system and users what sensitive resources or data the app needs access to.

Question 2

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

Accepted Answer

dangerous

Answer

Permissions with protection level 'dangerous' require explicit user approval at runtime because they access sensitive data or device features.

Question 3

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

Accepted Answer

ContextCompat.checkSelfPermission()

Answer

ContextCompat.checkSelfPermission() returns PERMISSION_GRANTED or PERMISSION_DENIED to indicate whether the app has a specific runtime permission.

Question 4

What does ProGuard/R8 do in Android release builds?

Accepted Answer

Shrinks, obfuscates, and optimizes code

Answer

ProGuard/R8 removes unused code, renames classes and methods to short names, and optimizes bytecode to reduce APK size and hinder reverse engineering.

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

The Android Keystore System allows apps to generate and store cryptographic keys in a secure container, making them difficult to extract from the device.

Android Development Practice Test

Android Development Practice Test

Android Development Android Security