Android Development Android Development 2

Question 1

Which lifecycle callback is invoked when an Activity is partially obscured by a dialog-themed Activity but still visible?

Accepted Answer

onPause()

Answer

onPause() fires when the Activity loses focus but remains partially visible, while onStop() only fires when fully hidden.

Question 2

In Jetpack Compose, what happens when a State<T> object read inside a composable changes its value?

Accepted Answer

The composable that reads it is scheduled for recomposition

Answer

Compose tracks state reads and automatically recomposes only the composables that read the changed state.

Question 3

A developer needs to run a task that must complete even if the user closes the app, such as uploading logs nightly. Which API is the recommended choice?

Accepted Answer

WorkManager

Answer

WorkManager guarantees deferrable, persistent background work that survives app exits and device restarts.

Question 4

What is the primary purpose of the AndroidManifest.xml file?

Accepted Answer

Declaring app components, permissions, and metadata to the system

Answer

The manifest declares Activities, Services, permissions, and other essential app information to the Android system.

Question 5

Which storage option is most appropriate for saving a small set of key-value user settings, such as a dark-mode flag?

Accepted Answer

DataStore (or SharedPreferences)

Answer

DataStore, the modern replacement for SharedPreferences, is designed for small key-value or typed settings data.

Android Development Practice Test

Android Development Practice Test

Android Development Android Development 2