AAD AAD Android Architecture & App Components 2

Question 1

What is the purpose of the AndroidManifest.xml file in an Android project?

Accepted Answer

To declare app components, permissions, and metadata

Answer

AndroidManifest.xml declares all app components, required permissions, hardware features, and other essential app metadata to the Android system.

Question 2

Which Android component is used to share data between different applications securely?

Accepted Answer

ContentProvider

Answer

A ContentProvider manages access to a central repository of data and provides a standard interface for sharing data between applications.

Question 3

What is the primary benefit of using ViewModel in Android Jetpack architecture?

Accepted Answer

It survives configuration changes like screen rotation

Answer

ViewModel is designed to store and manage UI-related data in a lifecycle-conscious way, surviving configuration changes such as screen rotations.

Question 4

What is the Android back stack?

Accepted Answer

A stack of Activities maintained by the system for navigation

Answer

The back stack is a last-in, first-out collection of Activities that the system manages so pressing the Back button navigates to the previous Activity.

Question 5

Which Activity method should you override to save UI state before the Activity is destroyed or paused?

Accepted Answer

onSaveInstanceState()

Answer

onSaveInstanceState() is called before an Activity is destroyed so you can save UI state in a Bundle, which is restored in onCreate() or onRestoreInstanceState().

(AAD) Associate Android Developer Certification Practice Test

(AAD) Associate Android Developer Certification Practice Test

AAD AAD Android Architecture & App Components 2