Android App Development: Master Mobile App Creation with Android Studio

Question 1

Which of these is NOT a core component of an Android app's architecture?

Accepted Answer

Database

Answer

Activity

Answer

Service

Answer

Broadcast Receiver

Question 2

Which class in Android represents a fundamental building block for user interaction and visual elements on the screen?

Accepted Answer

View

Answer

Activity

Answer

Intent

Answer

Service

Question 3

What is the recommended way to store data persistently in an Android application?

Accepted Answer

SQLite database

Answer

SharedPreferences

Answer

Text file

Answer

XML file

Question 4

Which Android API is used to manage and request permissions from users?

Accepted Answer

ActivityCompat

Answer

ContextCompat

Answer

PermissionManager

Answer

UserManager

Question 5

What is the primary purpose of an AsyncTask in Android development?

Accepted Answer

To execute long-running tasks in a separate thread while keeping the UI responsive

Answer

To handle user interface updates in the main thread

Answer

To store data in a database

Answer

To communicate with a remote server

Question 6

Which Android component is responsible for handling user interactions, such as clicks and swipes, on the screen?

Accepted Answer

View

Answer

Activity

Answer

Fragment

Answer

Service

Question 7

What is the main purpose and content of the AndroidManifest.xml file?

Accepted Answer

To declare application components, permissions, and other essential information

Answer

To define the user interface layout

Answer

To store application data

Answer

To handle user input events

Question 8

Which Android API is used to communicate data between different activities in an application?

Accepted Answer

Intent

Answer

BroadcastReceiver

Answer

Service

Answer

ContentProvider

Question 9

What is the fundamental difference between an Android fragment and an activity?

Accepted Answer

A fragment is a reusable component that represents a portion of a user interface, while an activity is the primary container of the UI

Answer

An activity is a reusable component that represents a portion of a user interface, while a fragment is the primary container of the UI

Answer

Fragments and activities are both reusable components

Answer

Fragments can be used independently of activities, while activities require fragments

Question 10

Which of the following is NOT a stage in the Android activity lifecycle?

Accepted Answer

onFinish()

Answer

onCreate()

Answer

onStart()

Answer

onResume()

Question 11

What is the main purpose of the Android manifest file?

Accepted Answer

To declare components, permissions, and application metadata

Answer

To define the user interface layout

Answer

To handle data storage and retrieval

Answer

To process user input events

Question 12

Which layout manager is used to arrange views horizontally, one after the other?

Accepted Answer

LinearLayout

Answer

RelativeLayout

Answer

FrameLayout

Answer

GridLayout

Question 13

What is the primary purpose of the SQLiteOpenHelper class in Android?

Accepted Answer

To manage database connections and create/upgrade database schemas

Answer

To execute SQL queries and manage data

Answer

To provide a graphical interface for database administration

Answer

To handle network requests for database access

Question 14

Which method is used to retrieve a stored String value from an Android SharedPreferences object?

Accepted Answer

getString()

Answer

getInt()

Answer

getBoolean()

Answer

getAll()

Question 15

What is the key difference between a service and a broadcast receiver in Android?

Accepted Answer

Services run continuously in the background, while broadcast receivers only run when a specific event occurs

Answer

Broadcast receivers run continuously in the background, while services only run when explicitly started

Answer

Services and broadcast receivers perform identical functions

Answer

Broadcast receivers are no longer supported in modern Android versions

Question 16

What is the primary function of the onBackPressed() method in an Android activity?

Accepted Answer

To handle the back button event and potentially prevent the activity from closing

Answer

To finish the current activity immediately

Answer

To navigate to the previous activity in the back stack

Answer

To display a confirmation dialog before closing the activity

Question 17

Which of the following is NOT a valid Android permission?

Accepted Answer

MY_CUSTOM_PERMISSION

Answer

CAMERA

Answer

INTERNET

Answer

ACCESS_FINE_LOCATION

Question 18

What is the purpose of the @Override annotation in Java and Android development?

Accepted Answer

To indicate that a method is overriding a method in a superclass

Answer

To prevent a method from being overridden by subclasses

Answer

To mark a method as deprecated

Answer

It has no significant effect on the method

Question 19

In Android development, what is the recommended approach for requesting permissions at runtime?

Accepted Answer

Check granted permissions with checkSelfPermission() and request permissions with requestPermissions()

Answer

Declare all required permissions in the AndroidManifest.xml file and assume they will be granted

Answer

Use the PermissionManager class to manage all permission requests

Question 20

What is the purpose of the XML layout file `activity_main.xml` in Android?

Accepted Answer

To define the visual representation of the main activity

Answer

To store styles and themes

Answer

To manage data in the application

Answer

To declare application components and permissions

Question 21

What is the primary way to manage data persistently in an Android application?

Accepted Answer

SQLite

Answer

JSON

Answer

CSV

Answer

XML

Question 22

Which of the following is a key component in the Android event-driven programming model?

Accepted Answer

Listener

Answer

Intent

Answer

Task

Answer

Broadcast

Question 23

What is the purpose of the AndroidManifest.xml file?

Accepted Answer

Declare application components, permissions, and other metadata

Answer

Manage application lifecycle

Answer

Store application data

Question 24

What is the purpose of the `onCreateView()` method in a Fragment?

Accepted Answer

Create and return the Fragment's user interface

Answer

Receive data from the Activity

Answer

Handle user interactions

Answer

Manage the Fragment's lifecycle

Question 25

What is the primary programming language used for Android application development?

Accepted Answer

Java

Answer

Python

Answer

C#

Answer

C++