Android Development Android Data Storage 3

Question 1

Where does Android store internal app files that are accessible only to the app?

Accepted Answer

getFilesDir()

Answer

getExternalFilesDir()

Answer

Environment.getExternalStorageDirectory()

Answer

getCacheDir()

Question 2

What is the purpose of the ContentProvider in Android?

Accepted Answer

To share data between apps using a standard interface

Answer

To provide UI content

Answer

To manage local SQLite databases

Answer

To sync data with a server

Question 3

Which DataStore type stores typed objects using Protocol Buffers?

Accepted Answer

Proto DataStore

Answer

Preferences DataStore

Answer

Typed DataStore

Answer

Object DataStore

Question 4

What happens to data in getCacheDir() when the device runs low on storage?

Accepted Answer

The system may delete cache files automatically

Answer

The app crashes

Answer

The data is moved to external storage

Answer

Nothing happens

Question 5

Which SQL clause is used in a Room @Query to filter results?

Accepted Answer

WHERE

Answer

FILTER

Answer

HAVING

Answer

CONDITION

Question 6

What is the recommended way to run Room database operations off the main thread?

Accepted Answer

Using Kotlin coroutines with suspend functions

Answer

Using AsyncTask

Answer

Using Thread.sleep()

Answer

Room automatically handles threading