Android Developer Quiz: Mastering Data Management Essentials

Elevate your Android developer interview preparation with our comprehensive MCQ quiz! Test your knowledge on crucial topics such as Data Storage, Shared Preferences, SQLite database and SQLiteOpenHelper, Content Providers, and Room Persistence Library. With 30 unique questions, each accompanied by a correct answer and detailed explanation, this quiz is tailored to help you excel in aptitude tests for Android developer interviews. Sharpen your skills and boost your confidence in handling data management challenges within the Android framework.

Data Storage:

Shared Preferences,
SQLite database and SQLiteOpenHelper,
Content Providers,
Room Database Persistence Library,

Which of the following is a lightweight mechanism to store and retrieve primitive data types in Android?

a) SQLite Database

b) SharedPreferences

c) Content Providers

d) Room Persistence Library

In Android, what is the primary purpose of SQLiteOpenHelper?

a) Managing Shared Preferences

b) Creating and managing an SQLite database

c) Providing content to other applications

d) Facilitating communication between activities

Which component in Android is responsible for managing structured data in a private database?

a) Shared Preferences

b) Content Providers

c) Room Persistence Library

d) SQLite Database

What is the primary function of Content Providers in Android?

a) Managing app preferences

b) Sharing data between applications

c) Storing data in a local database

d) Handling network requests

Which method is used to insert data into an SQLite database in Android?

a) insertData()

b) addData()

c) saveData()

d) insert()

What is the purpose of the MODE_PRIVATE parameter in the SharedPreferences file creation?

a) Enables public access to the file

b) Allows read and write access by other applications

c) Restricts access to the calling application only

d) Grants access to all applications on the device

In Android, which method is used to perform read operations on a SQLite database?

a) executeQuery()

b) readData()

c) query()

d) fetch()

What is the primary benefit of using Room Persistence Library over plain SQLite in Android?

a) Simplicity

b) Efficiency

c) Compatibility

d) Performance optimizations

Which method is used to delete data from an SQLite database in Android?

a) remove()

b) deleteData()

c) delete()

d) erase()

10.

What is the primary purpose of the `apply()` method in SharedPreferences in Android?

a) Save changes synchronously

b) Save changes asynchronously

c) Apply changes only if a condition is met

d) Apply changes with a delay

1 out of 3

11.

Which component is responsible for managing access to a database for different applications in Android?

a) SQLiteOpenHelper

b) Content Providers

c) SharedPreferences

d) Room Persistence Library

12.

What is the purpose of the `onUpgrade()` method in SQLiteOpenHelper?

a) Creating a new database

b) Upgrading the application version

c) Adding a new table to the database

d) Dropping an existing table

13.

Which annotation is used to define the primary key in a Room Persistence Library entity?

a) @PrimaryKey

b) @Key

c) @Primary

d) @EntityKey

14.

What is the primary purpose of the `commit()` method in SharedPreferences in Android?

a) Commit changes synchronously

b) Commit changes asynchronously

c) Apply changes only if a condition is met

d) Apply changes with a delay

15.

In Android, what does the acronym CRUD stand for in the context of databases?

a) Create, Read, Update, Delete

b) Connect, Retrieve, Update, Drop

c) Copy, Remove, Update, Delete

d) Change, Read, Utilize, Drop

16.

Which method is used to perform asynchronous database operations in Room Persistence Library?

a) queryAsync()

b) performAsync()

c) executeAsync()

d) @QueryAsync()

17.

What is the primary purpose of the `openFileOutput()` method in Android?

a) Opening a network connection

b) Opening a file for reading

c) Opening a file for writing

d) Opening a database connection

18.

Which attribute is used to specify the version of the database in the Room Persistence Library?

a) @DatabaseVersion

b) @Version

c) version

d) @Database

19.

What is the primary purpose of the `MODE_APPEND` parameter in SharedPreferences file creation?

a) Enables public access to the file

b) Allows read and write access by other applications

c) Restricts access to the calling application only

d) Appends data to an existing file

20.

In Android, what is the purpose of the `deleteDatabase()` method in SQLiteOpenHelper?

a) Deletes the entire database

b) Deletes a specific table from the database

c) Deletes a specific record from the database

d) Deletes the database schema

2 out of 3

21.

Which annotation is used to define a foreign key relationship between two entities in Room Persistence Library?

a) @ForeignKey

b) @Relation

c) @ForeignEntity

d) @EntityRelation

22.

What is the primary purpose of the `deleteFile()` method in Android?

a) Deletes the entire directory

b) Deletes a specific file from the internal storage

c) Deletes a specific record from a database

d) Deletes the application data

23.

In Android, what does the acronym ORM stand for in the context of databases?

a) Object-Relational Mapping

b) Object-Resource Mapping

c) Object-Record Mapping

d) Object-Repository Mapping

24.

Which method is used to perform write operations on an SQLite database in Android?

a) update()

b) save()

c) write()

d) insert()

25.

What is the primary purpose of the `MODE_WORLD_READABLE` parameter in SharedPreferences file creation?

a) Enables public access to the file

b) Allows read and write access by other applications

c) Restricts access to the calling application only

d) Allows all applications on the device to read the file

26.

Which method is used to perform update operations on an SQLite database in Android?

a) modify()

b) update()

c) edit()

d) change()

27.

What is the primary purpose of the `onCreate()` method in SQLiteOpenHelper?

a) Creating a new database

b) Upgrading the application version

c) Adding a new table to the database

d) Dropping an existing table

28.

In Android, what is the purpose of the `openFileInput()` method?

a) Opening a network connection

b) Opening a file for reading

c) Opening a file for writing

d) Opening a database connection

29.

Which annotation is used to define an index on a specific column in Room Persistence Library?

a) @Index

b) @ColumnIndex

c) @Indexed

d) @ColumnOrder

30.

What is the primary purpose of the `onDowngrade()` method in SQLiteOpenHelper?

a) Downgrading the application version

b) Upgrading the application version

c) Adding a new table to the database

d) Dropping an existing table

3 out of 3

Android Developer Quiz: Mastering Data Management Essentials

Data Storage:

AVADA TECH FORUM

POPULAR TOPICS

RECENT POSTS

LATEST REPLIES

Android Developer Quiz: Mastering Data Management Essentials

Data Storage:

Share This Story, Choose Your Platform!

Related Posts

Android Developer Aptitude Quiz: Mastering Background Processing

Android Interview Quiz: Master UI Components, Buttons, EditText, TextView, and More !

Android Quiz: Mastering UI, Components, Layouts, Events, and Material Design

Android Quiz: Mastering Basics of Activity, Fragment, Intent, Views, RecyclerViews and More!

App Development Quiz

Android Core Quiz

AVADA TECH FORUM

POPULAR TOPICS

RECENT POSTS

LATEST REPLIES