Flutter & Dart Test

Dinance is a crypto finance mobile app. The app is built using Flutter and uses Sliders at multiple places. Review the following two snippets of Sliders used in the app. How will the Sliders be displayed?

A: Slider X is displayed as a continuous slider with values {0.0, 0.25, 0.5, 0.75, 1.0}
B: Slider X is displayed as a discrete slider with values {0.0, 0.25, 0.5, 0.75, 1.0}
C: Slider X is displayed as a discrete slider with values {0.0, 0.33, 0.67, 1.0}
D: Slider X is displayed as a discrete Slider with the values {0.0, 1.0, 2.0, 3.0, 4.0}

E: Slider Y is displayed as a discrete Slider with the thumb rightmost
F: Slider Y is displayed as a continuous Slider with thumb leftmost
G: Slider Y is displayed as a discrete Slider with values {0.0, 0.25, 0.5, 0.75, 1.0} with thumb left most
H: Slider Y is displayed as a continuous Slider with thumb rightmost

Review the following Flutter code:

The code produces the following UI:

What will the UI look like if we add following properties to Wrap widget (after line 29):

textDirection: TextDirection.rtl
direction: Axis.vertical

Review the following Dart code:

The code reads data from a file synchronously. The code blocks while waiting for file I/O. Which of the following is the proper asynchronous version of the same code? 

- Assume readAsString is asynchronous version of readAsStringSync
- Lines with changes compared to original code are marked with // #

What would the following Dart code print?