Android Development Android UI and Layouts 2

Question 1

What class is used to implement custom drawing on a Canvas in Android?

Accepted Answer

Custom View extending View

Answer

SurfaceView only

Answer

ImageView subclass

Answer

DrawableView

Question 2

Which attribute controls the visibility of a view in Android XML?

Accepted Answer

android:visibility

Answer

android:display

Answer

android:show

Answer

android:hidden

Question 3

What is the purpose of the include tag in Android XML layouts?

Accepted Answer

To reuse a layout file inside another layout

Answer

To include Java code in XML

Answer

To import external resources

Answer

To embed a WebView

Question 4

Which method is called when the size of a view changes?

Accepted Answer

onSizeChanged

Answer

onLayout

Answer

onMeasure

Answer

onDraw

Question 5

What does the dp unit represent in Android?

Accepted Answer

Density-independent pixels

Answer

Device pixels

Answer

Drawable pixels

Answer

Default pixels

Question 6

Which component in Material Design is used to display brief, non-disruptive messages at the bottom of the screen?

Accepted Answer

Snackbar

Answer

Toast

Answer

Dialog

Answer

AlertDialog