Android is a mobile operating system developed by Google, based on a modified version of the Linux kernel. First released in 2008, it has evolved into the world’s most popular OS for smartphones, tablets, and other devices, powering billions of units globally.
At its core, Android offers an open-source platform that emphasizes customization, allowing manufacturers like Samsung, Google, and OnePlus to tailor it to their hardware. Its user-friendly interface features a home screen with widgets, notifications, and seamless integration with Google services such as Gmail, Maps, and YouTube.
Key features include:
App Ecosystem: Access to over 3 million apps via the Google Play Store, covering productivity, gaming, social media, and more.
Multitasking and Performance: Supports efficient multitasking, with features like split-screen mode and adaptive battery management for better efficiency.
Security and Privacy: Built-in tools like Google Play Protect, app permissions, and biometric authentication help safeguard user data.
Updates and Versions: Regular updates (e.g., Android 14) introduce enhancements in AI, privacy controls, and user experience, though rollout depends on device manufacturers.
Android’s dominance stems from its flexibility, affordability, and widespread adoption, with a market share exceeding 70% in the global smartphone market as of 2023. It continues to innovate, integrating technologies like 5G, foldable screens, and advanced AI assistants.
Table of contents
- Part 1: OnlineExamMaker AI quiz generator – The easiest way to make quizzes online
- Part 2: 20 Android quiz questions & answers
- Part 3: AI Question Generator – Automatically create questions for your next assessment
Part 1: OnlineExamMaker AI quiz generator – The easiest way to make quizzes online
When it comes to ease of creating an Android assessment, OnlineExamMaker is one of the best AI-powered quiz making software for your institutions or businesses. With its AI Question Generator, just upload a document or input keywords about your assessment topic, you can generate high-quality quiz questions on any topic, difficulty level, and format.
What you will like:
● AI Question Generator to help you save time in creating quiz questions automatically.
● Share your online exam with audiences on social platforms like Facebook, Twitter, Reddit and more.
● Display the feedback for correct or incorrect answers instantly after a question is answered.
● Create a lead generation form to collect an exam taker’s information, such as email, mobile phone, work title, company profile and so on.
Automatically generate questions using AI
Part 2: 20 Android quiz questions & answers
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1. Question: What is Android?
Options:
A. An operating system for mobile devices
B. A programming language
C. A web browser
D. A database management system
Answer: A
Explanation: Android is an open-source operating system based on Linux, primarily designed for mobile devices like smartphones and tablets.
2. Question: What is the primary function of an Activity in Android?
Options:
A. To handle background tasks
B. To represent a single screen with a user interface
C. To manage network connections
D. To store data persistently
Answer: B
Explanation: An Activity is a fundamental component that provides a user interface for interaction, representing a single screen in an Android app.
3. Question: Which method is called when an Activity is first created?
Options:
A. onStart()
B. onResume()
C. onCreate()
D. onPause()
Answer: C
Explanation: The onCreate() method is the first callback in the Activity lifecycle, where you initialize the app’s UI and perform one-time setup.
4. Question: What is an Intent in Android?
Options:
A. A way to store user data
B. A messaging object used to request an action from another app component
C. A type of layout file
D. A background service
Answer: B
Explanation: An Intent facilitates communication between app components, such as starting an Activity or broadcasting an event.
5. Question: How do you start a new Activity from the current one?
Options:
A. Using startService()
B. Using startActivity() with an Intent
C. Using onCreate() method
D. Using bindService()
Answer: B
Explanation: The startActivity() method is used with an Intent object to launch a new Activity and pass data if needed.
6. Question: What is a Fragment in Android?
Options:
A. A separate thread for background tasks
B. A modular section of a user interface that can be reused
C. A type of Intent
D. A storage mechanism
Answer: B
Explanation: A Fragment is a reusable UI component that can be embedded in Activities, allowing for more flexible and dynamic app designs.
7. Question: Which file in an Android project defines components like Activities and Services?
Options:
A. build.gradle
B. AndroidManifest.xml
C. strings.xml
D. activity_main.xml
Answer: B
Explanation: The AndroidManifest.xml file declares all app components and their capabilities, such as permissions and intents.
8. Question: What is the purpose of SharedPreferences in Android?
Options:
A. To handle large databases
B. To store key-value pairs of primitive data types
C. To manage network requests
D. To create animations
Answer: B
Explanation: SharedPreferences is used for storing small amounts of data, like user settings, in a simple key-value format.
9. Question: Which layout manager is commonly used for displaying lists of data efficiently?
Options:
A. LinearLayout
B. RecyclerView
C. RelativeLayout
D. FrameLayout
Answer: B
Explanation: RecyclerView provides an efficient way to display large datasets by recycling views, improving performance over older ListView.
10. Question: What does the onPause() method in an Activity lifecycle do?
Options:
A. Saves the state of the Activity
B. Pauses the Activity when it’s no longer visible
C. Resumes the Activity
D. Destroys the Activity
Answer: B
Explanation: onPause() is called when the Activity is about to go into the background, allowing you to release resources or save data.
11. Question: Which Android component is used for performing long-running operations in the background?
Options:
A. Activity
B. Service
C. BroadcastReceiver
D. Fragment
Answer: B
Explanation: A Service runs operations in the background without a user interface, such as playing music or downloading files.
12. Question: What is the main use of BroadcastReceiver in Android?
Options:
A. To handle user inputs
B. To receive and respond to system or app events
C. To store broadcast messages
D. To create UI elements
Answer: B
Explanation: BroadcastReceiver listens for broadcast announcements, like network changes or battery status, and performs actions accordingly.
13. Question: How do you request permissions in Android apps?
Options:
A. Directly in the code without user interaction
B. Using the AndroidManifest.xml and runtime requests for dangerous permissions
C. Only through the layout files
D. Via intents
Answer: B
Explanation: Permissions must be declared in AndroidManifest.xml, and for runtime permissions (like camera access), user approval is required at runtime.
14. Question: What is the difference between dp and px in Android?
Options:
A. dp is for density-independent pixels, while px is for absolute pixels
B. dp and px are the same
C. px is for density-independent, dp for absolute
D. dp is used only for text
Answer: A
Explanation: dp (density-independent pixels) scales with device density, ensuring consistent UI across different screen sizes, unlike px.
15. Question: Which design pattern is commonly used in Android for separating concerns in app architecture?
Options:
A. Singleton
B. MVVM (Model-View-ViewModel)
C. Factory
D. Observer
Answer: B
Explanation: MVVM helps in organizing code by separating the UI (View) from business logic (ViewModel), making apps more maintainable.
16. Question: What is the role of the onSaveInstanceState() method?
Options:
A. To save the entire app state
B. To save temporary data when an Activity is destroyed due to configuration changes
C. To load data on app start
D. To handle network saves
Answer: B
Explanation: onSaveInstanceState() preserves UI state during process death, like screen rotations, so data can be restored in onCreate().
17. Question: How can you display notifications in Android?
Options:
A. Using NotificationManager
B. Directly in XML layouts
C. Through Activities only
D. Via BroadcastReceiver
Answer: A
Explanation: NotificationManager is used to create and display notifications, allowing users to be alerted even when the app is not in focus.
18. Question: What is Google Play Services used for in Android apps?
Options:
A. Only for game development
B. To provide APIs for maps, authentication, and other Google services
C. To manage app storage
D. To handle UI designs
Answer: B
Explanation: Google Play Services offers a suite of APIs for features like location services, ads, and cloud messaging, enhancing app functionality.
19. Question: Which language is officially recommended for new Android development?
Options:
A. C++
B. Java
C. Kotlin
D. Python
Answer: C
Explanation: Kotlin is the preferred language for Android development due to its modern features, null safety, and full interoperability with Java.
20. Question: What is the purpose of the Android SDK?
Options:
A. To design user interfaces
B. To provide tools and libraries for developing Android apps
C. To manage device hardware
D. To run apps on emulators
Answer: B
Explanation: The Android SDK includes tools, documentation, and libraries that developers use to build, test, and debug Android applications.
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Part 3: AI Question Generator – Automatically create questions for your next assessment
Automatically generate questions using AI