Android Development Android Data Storage

Question 1

Which Android Jetpack library provides an abstraction layer over SQLite for local data persistence?

Accepted Answer

Room

Answer

DataStore

Answer

LiveData

Answer

SQLiteOpenHelper

Question 2

What annotation marks a class as a Room database entity?

Accepted Answer

@Entity

Answer

@Table

Answer

@DatabaseObject

Answer

@Model

Question 3

Which Room annotation is used to define data access methods?

Accepted Answer

@Dao

Answer

@Repository

Answer

@Query

Answer

@Database

Question 4

What is the purpose of SharedPreferences in Android?

Accepted Answer

To store small amounts of primitive key-value data persistently

Answer

To share data between apps

Answer

To store large files

Answer

To manage user accounts

Question 5

Which Jetpack component is the recommended replacement for SharedPreferences?

Accepted Answer

DataStore

Answer

Room

Answer

WorkManager

Answer

LiveData

Question 6

What does WAL mode stand for in SQLite?

Accepted Answer

Write-Ahead Logging

Answer

Write Access Lock

Answer

Web API Layer

Answer

Write and Load