1. What is Android?
a. A mobile device manufacturer
b. An operating system
c. A programming language
d. A hardware component
Answer: b. An operating system
2. Which programming language is primarily used for Android development?
a. Java
b. C++
c. Python
d. Ruby
Answer: a. Java
3. What is an APK in Android?
a. Android Package
b. Application Package
c. Android Programming Kit
d. Application Program Kernel
Answer: b. Application Package
4. What component is responsible for managing the lifecycle of an Android app?
a. Activity
b. Service
c. Intent
d. Fragment
Answer: a. Activity
5. What is an Intent in Android?
a. A mandatory permission for Android apps
b. A type of database in Android
c. A message passing mechanism between components
d. An Android application package
Answer: c. A message passing mechanism between components
6. Which layout is used to align items horizontally or vertically in Android?
a. RelativeLayout
b. LinearLayout
c. FrameLayout
d. ConstraintLayout
Answer: b. LinearLayout
7. Which database is most commonly used in Android for local storage?
a. MySQL
b. SQLite
c. MongoDB
d. PostgreSQL
Answer: b. SQLite
8. Which component is used to perform background tasks in Android?
a. Activity
b. Service
c. Broadcast Receiver
d. Content Provider
Answer: b. Service
9. What is an AsyncTask in Android?
a. A task that runs in the UI thread
b. A task that runs in a separate thread from the UI thread
c. A task that runs in the background thread
d. A task that requires user interaction
Answer: b. A task that runs in a separate thread from the UI thread
10. What is an ADB in Android?
a. Android Debug Bridge
b. Android Development Board
c. Android Database
d. Android Debugging Backend
Answer: a. Android Debug Bridge
11. Which layout is best suited for complex UI designs with multiple nested views in Android?
a. LinearLayout
b. RelativeLayout
c. ConstraintLayout
d. FrameLayout
Answer: c. ConstraintLayout
12. Which component is used to store data and pass it to activities and fragments in Android?
a. Intent
b. Bundle
c. SharedPreferences
d. SQLite Database
Answer: b. Bundle
13. What is the purpose of ProGuard in Android?
a. To optimize the app's performance
b. To obfuscate the app's code
c. To debug the app
d. To manage app permissions
Answer: b. To obfuscate the app's code
14. Which method is used to request runtime permissions in Android?
a. requestPermissions()
b. checkPermissions()
c. askForPermissions()
d. requirePermissions()
Answer: a. requestPermissions()
15. What is the purpose of the Android Interface Definition Language (AIDL)?
a. To define the app's interface for user interactions
b. To define interfaces for inter-process communication
c. To define the app's data models
d. To define the app's resources
Answer: b. To define interfaces for inter-process communication
16. What is a PendingIntent in Android?
a. A pending action to be executed in the future
b. An activity awaiting user interaction
c. An intent that is currently being processed
d. An intent that is broadcast to other components
Answer: a. A pending action to be executed in the future
17. Which class is used to manage the SQLite database in Android?
a. SQLiteDatabase
b. SQLiteManager
c. DatabaseHelper
d. SQLiteOpenHelper
Answer: d. SQLiteOpenHelper
18. What is the purpose of the Android Handler class?
a. To handle UI interactions
b. To manage background tasks
c. To manage app permissions
d. To handle communication between threads
Answer: d. To handle communication between threads
19. Which method is used to add a fragment to an activity in Android?
a. addFragment()
b. attachFragment()
c. replaceFragment()
d. createFragment()
Answer: c. replaceFragment()
20. What is the purpose of the startActivityForResult() method in Android?
a. To start a new activity and get a result back
b. To start a background service
c. To bind to a content provider
d. To handle background tasks
Answer: a. To start a new activity and get a result back
21. What is the purpose of the ActionBar in Android?
a. To display notifications
b. To show advertisements
c. To provide navigation and actions for the app
d. To handle background tasks
Answer: c. To provide navigation and actions for the app
22. What is the purpose of the onSaveInstanceState() method in Android?
a. To save the current state of the activity
b. To save the app's data
c. To save the app's layout
d. To save the app's permissions
Answer: a. To save the current state of the activity
23. Which tool is used to profile the performance of an Android app?
a. Android Studio Profiler
b. LogCat
c. ADB (Android Debug Bridge)
d. Monitor
Answer: a. Android Studio Profiler
24. What is the purpose of the JobScheduler in Android?
a. To schedule background tasks that need to run periodically
b. To schedule app updates
c. To schedule UI updates
d. To schedule database operations
Answer: a. To schedule background tasks that need to run periodically
25. What is the purpose of the ViewBinding in Android?
a. To bind views to data models
b. To bind views to UI components
c. To bind views to event handlers
d. To bind views to permissions
Answer: b. To bind views to UI components
26. What is the purpose of the ViewModel in Android architecture?
a. To manage app permissions
b. To manage UI-related data
c. To manage background tasks
d. To manage app resources
Answer: b. To manage UI-related data
27. What is the difference between Serializable and Parcelable in Android?
a. Serializable is faster than Parcelable
b. Serializable is Android-specific, while Parcelable is a standard Java interface
c. Serializable uses a different mechanism for object serialization
d. Parcelable is faster than Serializable
Answer: d. Parcelable is faster than Serializable
28. What is the purpose of the LayoutInflater in Android?
a. To create an instance of an Activity
b. To load the app's layout from XML
c. To handle background tasks
d. To manage the app's permissions
Answer: b. To load the app's layout from XML
29. What is the purpose of the Android Resource directory?
a. To store the app's source code
b. To store app-specific resources such as images, strings, and layouts
c. To store app data
d. To store third-party libraries
Answer: b. To store app-specific resources such as images, strings, and layouts
30. Which method is called to start an activity in Android?
a. onCreate()
b. onStart()
c. onResume()
d. startActivity()
Answer: d. startActivity()
31. What is the purpose of the ViewHolder pattern in Android RecyclerView?
a. To hold references to UI components for efficient reuse
b. To manage database operations
c. To manage background tasks
d. To handle navigation within the app
Answer: a. To hold references to UI components for efficient reuse
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