NativeScript for Mobile App Development UI Components and Layouts 3

Question 1

Which component allows the user to pick a value from a dropdown list in NativeScript?

Accepted Answer

ListPicker

Answer

ListPicker renders a native scrollable picker control for selecting a single value from a list.

Question 2

What does `col` and `row` attribute do in a GridLayout child element?

Accepted Answer

Position the child in a specific column and row of the grid

Answer

`col` and `row` attributes specify which grid cell a child occupies within a GridLayout.

Question 3

Which NativeScript component wraps content to enable vertical or horizontal scrolling?

Accepted Answer

ScrollView

Answer

ScrollView wraps a single child and enables scrolling when its content exceeds the visible area.

Question 4

What is the purpose of the `visibility` property on a NativeScript view?

Accepted Answer

Controls whether the view is visible, hidden, or collapsed

Answer

The `visibility` property accepts 'visible', 'hidden' (retains space), or 'collapse' (removes space) to control view visibility.

Question 5

Which gesture recognizer detects a long press in NativeScript?

Accepted Answer

longPress

Answer

The `longPress` gesture event fires when the user holds a touch on a view for an extended duration.

NativeScript for Mobile App Development Practice Test