Android UI - Review Questions

 

  • What is the highest-level class of any UI in Android?
  • Which UI elements inherit from the View class?
  • What does a layout define in Android UI?
  • What is the purpose of a Constraint Layout?
  • What are the common attributes used in a Constraint Layout?
  • How does a Linear Layout arrange child views?
  • Can a Linear Layout be a child of a Constraint Layout?
  • How are widgets positioned in a Relative Layout?
  • What alignment options does a Relative Layout support?
  • How does a Table Layout arrange its child views?
  • What elements does a Table Layout consist of?
  • What is the purpose of a Frame Layout?

  • Answers

    1. The highest-level class of any UI in Android is View.
    2. UI elements like Button, TextView, and other components inherit from View.
    3. A layout defines the visual structure of the UI.
    4. A Constraint Layout positions views relative to other widgets.
    5. Common attributes for Constraint Layout: layout_width, layout_height (values: match_parent, wrap_content).
    6. A Linear Layout arranges child views in a single direction (either vertical or horizontal).
    7. Yes, a Linear Layout can be a child of a Constraint Layout.
    8. Widgets in a Relative Layout are arranged in relative positions to each other.
    9. A Relative Layout supports alignment options like bottom, center, left, right.
    10. A Table Layout arranges child views in rows and columns.
    11. A Table Layout consists of TableRow elements.
    12. A Frame Layout blocks out an area to display a single item.

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