Android Development: Master the Fundamentals for Mobile App Creation

Question 1

In Android development, which component facilitates communication between activities?

Accepted Answer

Intents

Answer

Fragments

Answer

Services

Answer

BroadcastReceivers

Question 2

Describe the distinction between explicit and implicit intents.

Accepted Answer

Explicit intents specify the target component, while implicit intents specify only the action.

Answer

Implicit intents specify the target component, while explicit intents specify only the action.

Answer

There is no meaningful distinction between explicit and implicit intents.

Answer

Implicit intents are always asynchronous, while explicit intents are synchronous.

Question 3

Which lifecycle method is invoked when an activity is temporarily suspended?

Accepted Answer

onPause()

Answer

onStop()

Answer

onDestroy()

Answer

onResume()

Question 4

What is the purpose of the AndroidManifest.xml file in an Android project?

Accepted Answer

To declare components (activities, services, etc.), permissions, and other essential app metadata.

Answer

To define application permissions.

Answer

To store application data.

Answer

To specify the application's visual layout.

Question 5

Which Android class is responsible for displaying user interface elements?

Accepted Answer

View

Answer

Activity

Answer

Intent

Answer

Fragment

Question 6

What is the onSaveInstanceState(Bundle) method in an activity used for?

Accepted Answer

Preserving the activity's state in case of destruction, allowing for restoration later.

Answer

Storing user preferences.

Answer

Facilitating data exchange between activities.

Answer

Managing fragment lifecycles.

Question 7

Which resource file type is used to store string resources in an Android application?

Accepted Answer

strings.xml

Answer

layout.xml

Answer

styles.xml

Answer

colors.xml

Question 8

What is the primary advantage of utilizing a RecyclerView in Android applications?

Accepted Answer

Efficient display of extensive datasets.

Answer

Simplified user interaction handling.

Answer

Enhanced navigation between screens.

Answer

Persistent data storage.

Question 9

What is the primary purpose of a fragment in Android?

Accepted Answer

To represent a modular and reusable portion of a user interface

Answer

To facilitate the flow of data between activities

Answer

To handle tasks that occur in the background

Answer

To store configuration-related information

Question 10

Which method is used to initiate the launch of a new activity in Android?

Accepted Answer

startActivity()

Answer

getIntent()

Answer

putExtra()

Answer

sendBroadcast()

Question 11

What is the primary function of the Android SDK?

Accepted Answer

To provide a comprehensive collection of tools and libraries for developing Android applications

Answer

To establish the core definitions of the Android operating system

Answer

To control the installation and distribution of Android applications

Answer

To facilitate the connection of Android devices to the internet

Question 12

What is the key difference between an activity and a fragment?

Accepted Answer

An activity represents a complete window, while a fragment represents a reusable portion within a window

Answer

A fragment represents a complete window, while an activity represents a reusable portion within a window

Answer

Activities are dynamically created, whereas fragments are statically created

Answer

Fragments are dynamically created, whereas activities are statically created

Question 13

What is the primary purpose of the intent filter defined in an AndroidManifest.xml file?

Accepted Answer

To define the actions and categories that an activity can respond to

Answer

To specify the layout structure of an activity

Answer

To store configuration information related to an activity

Answer

To handle user interactions

Question 14

Which of the following file extensions is used for Android layout resource files?

Accepted Answer

.xml - The standard file extension for Android layout resource files, defining the structure and appearance of the user interface.

Answer

.java

Question 15

Which thread is primarily responsible for updating the user interface in Android applications?

Accepted Answer

Main Thread - The thread that handles UI operations and should be used for updating the user interface.

Answer

Background Thread

Question 16

Which of the following is NOT a benefit of utilizing Logcat for debugging Android applications?

Accepted Answer

Provides performance profiling capabilities

Answer

Displays logs and errors in real-time

Answer

Facilitates filtering of logs based on severity

Question 17

In collaborative Android development, how does Git contribute to project success?

Accepted Answer

Git enables version control and conflict resolution among multiple developers working on the same codebase.

Answer

Git automates the deployment of Android applications.

Answer

Git primarily serves as a backup tool for code in case of data loss.

Answer

Git is mainly used for team communication and feedback exchange.

Question 18

To make an Android app accessible to screen reader users, which attribute should you use on `TextView` elements?

Accepted Answer

contentDescription

Answer

accessibilityService

Answer

src

Question 19

Which of the following is not a component of the Android Software Development Kit (SDK)?

Accepted Answer

Eclipse

Answer

Android Studio

Answer

Gradle

Answer

Java Development Kit (JDK)

Question 20

What is the primary function of an Activity in Android application development?

Accepted Answer

Manages the user interface (UI) and user interaction for a specific screen.

Answer

Handles data storage and retrieval.

Answer

Facilitates communication between different application components.

Question 21

Which of the following is used to dynamically replace a portion of an Activity's UI?

Accepted Answer

Fragment

Answer

BroadcastReceiver

Answer

Intent

Question 22

What is the main purpose of an Intent in Android development?

Accepted Answer

To initiate activities or services.

Answer

To define the layout of the app's UI.

Answer

To store data in shared preferences.

Answer

To handle asynchronous tasks.

Question 23

Which of the following is not a lifecycle method of an Activity?

Accepted Answer

onCreateOptionsMenu()

Answer

onDestroy()

Answer

onStart()

Answer

onResume()

Question 24

What is the purpose of the Android Manifest file?

Accepted Answer

To declare application metadata, permissions, and components.

Answer

To store application data.

Answer

To specify the application's user interface.

Question 25

Which of the following layout managers is used to display views as a vertical or horizontal list?

Accepted Answer

LinearLayout

Answer

GridLayout

Answer

FrameLayout

Answer

RelativeLayout

Question 26

What is the primary purpose of a ContentProvider in Android?

Accepted Answer

To provide a unified interface for accessing data from different sources.

Answer

To manage the application's lifecycle.

Answer

To handle user input and events.

Question 27

Which of the following is not an advantage of using RecyclerView in Android?

Accepted Answer

Increased memory usage

Answer

Improved performance for large datasets.

Answer

Efficient view recycling.

Answer

Support for various layouts.