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ExampleQuiz

1. A Fragment can exist independently without being attached to an Activity.

Answer: False Explanation: A Fragment must always be associated with an Activity; it cannot exist independently.↳

2. What is the primary purpose of onSaveInstanceState() in an Activity?

Answer: b. To save the current state of the Activity in case it is destroyed and recreated Explanation: This method saves state information in a Bundle to restore the Activity later.↳

3. Activities are the only components that can host a Fragment.

Answer: False Explanation: Fragments can also be hosted by other Fragments (nested Fragments).

4. What happens when you call finish() in an Activity?

Answer: a. The current Activity is destroyed and removed from the back stack Explanation: The system calls onDestroy() and removes the Activity from the back stack.↳

5. Which method is called when an Activity is becoming visible to the user?

Answer: a. onStart() Explanation: onStart() is called when the Activity becomes visible but not yet interactive.↳

6. Match the Fragment lifecycle method with its corresponding event.

  • onCreateView(): B) Called to create the Fragment's view hierarchy
  • onDestroy(): D) Called when the Fragment is being destroyed
  • onCreate(): A) Called when the Fragment is created
  • onPause(): C) Called when the Fragment is about to go into the background

7. Match the layout attribute with its purpose.

  • layout_margin: A) Sets the outer space of the view
  • layout_weight: D) Defines the proportion of space a view should occupy in a LinearLayout
  • layout_gravity: C) Specifies how a view should be placed within its parent
  • layout_padding: B) Sets the inner space within the view's boundaries

8. Which layout allows you to position child views relative to each other?

Answer: a. RelativeLayout Explanation: RelativeLayout allows positioning child views relative to each other or the parent.↳

9. The onPause() method is guaranteed to be called before an Activity is destroyed.

Answer: False Explanation: The system may skip onPause() in cases where the Activity is forcefully terminated.

10. The onCreateView() method in a Fragment is used to create and return the Fragment's view hierarchy.

Answer: True Explanation: onCreateView() is responsible for inflating and returning the Fragment's UI.

  • replace(): D) Replaces an existing Fragment with a new one
  • commit(): C) Commits a Fragment transaction
  • addToBackStack(): B) Adds a Fragment transaction to the back stack
  • findFragmentById(): A) Locates a Fragment by its ID

12. In Android, a layout defines the structure for a user interface (UI).

Answer: True Explanation: Layouts define the arrangement of views in an Activity or Fragment.

13. A RelativeLayout allows you to position its child views in relation to other child views or the parent container.

Answer: True Explanation: This is the primary purpose of RelativeLayout.

14. Match the Activity lifecycle method with the correct sequence.

  • onStop(): D) The Activity is no longer visible to the user
  • onStart(): A) The Activity becomes visible to the user
  • onPause(): C) The Activity loses focus but remains visible
  • onResume(): B) The Activity comes to the foreground and becomes interactive

15. Which of the following methods is used to add a Fragment to an Activity?

Answer: c. add() Explanation: add() is used to add a Fragment to an Activity's container.

16. What is the purpose of FragmentTransaction in Android development?

Answer: a. To perform operations such as adding, removing, or replacing fragments Explanation: FragmentTransaction is used to manage Fragment-related operations.

17. The onCreate() method is called only once throughout the lifetime of an Activity.

Answer: True Explanation: onCreate() is called once when the Activity is created and initializes resources.↳

18. Match the Activity state with its description.

  • Paused: B) The Activity is visible but not in the foreground
  • Stopped: C) The Activity is no longer visible and may be killed by the system
  • Destroyed: D) The Activity is terminated and removed from memory
  • Active: A) The Activity is running and interacting with the user

19. The LinearLayout arranges its children in a single column or row, either horizontally or vertically.

Answer: True Explanation: The LinearLayout arranges child views in a straight line based on its orientation attribute.