Android Developer Professional Certification

1. Which component in Android is used to display a scrollable list of items?

FrameLayout

RecyclerView

ConstraintLayout

ProgressBar

1. Which file in an Android project contains the application's permissions and hardware requirements?

MainActivity.java

AndroidManifest.xml

build.gradle

res/values/strings.xml

3. What is the default database used by Android for data storage?

SQLite

MongoDB

Firebase

MySQL

4. Which method is used to start an activity in Android?

startService()

startActivity()

onCreate()

onStart()

5. What does the "dp" unit stand for in Android?

Display Pixels

Density-independent Pixels

Device Pixels

Dimension Pixels

6. Which Android component is used to perform background tasks?

Activity

Service

Fragment

Intent

7. Which layout allows you to position child views relative to each other or the parent?

LinearLayout

FrameLayout

RelativeLayout

TableLayout

8. Which method is called when an Activity is created for the first time?

onStart()

onCreate()

onResume()

onDestroy()

9. Which class is used to store and manage UI-related data in a lifecycle-conscious way?

ViewModel

LiveData

RecyclerView

Room

10. What is the purpose of the Gradle build system in Android development?

To design the UI of an app

To compile and manage project dependencies

To create database connections

To store app configurations

11. Which component is used to make asynchronous requests to a web API in Android?

AsyncTask

Retrofit

BroadcastReceiver

RecyclerView

12. What is the role of the ContentProvider in Android?

To manage UI components

To share data between applications

To handle background tasks

To manage user input

13. Which of the following is NOT an Android component?

Service

Fragment

ViewController

ContentProvider

14. Which library is commonly used in Android for image loading and caching?

Room

Glide

Volley

OkHttp

15. What does ANR stand for in Android?

Android Notification Response

Application Not Responding

Async Network Request

Activity Notification Receiver

16. Which file contains the layout for the UI in Android?

activity_main.xml

AndroidManifest.xml

build.gradle

MainActivity.java

17. What is the purpose of the Intent class in Android?

To create database connections

To handle user input

To navigate between components or send messages

To display notifications

18. Which Android component is used to listen for and handle system-wide broadcast messages?

BroadcastReceiver

Service

Fragment

ViewModel

19. Which annotation is used in Android to specify that a function runs on a background thread?

@Override

@BackgroundTask

@WorkerThread

@Async