Flutter Online Test

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About the test

The Flutter online test assesses knowledge of key concepts used to build UIs with Flutter, through a series of multiple-choice and fill-in-the-blank questions.

The assessment includes work-sample tasks such as:

  • Managing and configuring widgets.
  • Navigating between routes.
  • Using conditional rendering to dynamically show/hide UI elements.

A good Flutter developer should be able to work with the Flutter framework to build high performance and user-friendly interfaces.

Sample public questions

Easy
5 min
mca
Public
Flutter
Layout
Widgets

You are making a Flutter widget to display a popup ad in your app.

The popup ad has 3 sections - title, main, and footer.

Below is the code of the widget:

Column(
    crossAxisAlignment: CrossAxisAlignment.center,
    mainAxisAlignment: MainAxisAlignment.spaceBetween,
    children: <Widget>[
      Expanded(
        flex: 2,
        child: Container(
          margin: EdgeInsets.symmetric(vertical: 5),
          width: double.infinity,
          child: Center(child: Text("Title content"))),
      ),
      Expanded(
        flex: 4,
        child: Container(
          width: double.infinity,
          child: Center(child: Text("Main content"))),
      ),
      Expanded(
        flex: 1,
        child: Container(
          width: double.infinity,
          child: Text("Footer content"))
      ),
    ]);

What can we conclude about the layout of the above widget? 

Easy
7 min
mca
Public
Flutter
Life Cycle
Widgets

A voting application made with Flutter uses the VoteOnce widget, which allows the user to trigger the onTapCallback function only once no matter how many times it's tapped.

The code for VoteOnce widget is given below:

class VoteOnce extends StatefulWidget {
  final Function onTapCallback;
  final String tapText;

  const VoteOnce({Key? key, required this.onTapCallback, required this.tapText}): super(key: key);

  @override
  _VoteOnceState createState() => _VoteOnceState();
}

class _VoteOnceState extends State<VoteOnce> {
  bool _wasTapped = false;
  String _displayText = "";

  @override
  void initState() {
    super.initState();
    _displayText = widget.tapText;
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      child: GestureDetector(
        onTap: () {
          if (!_wasTapped) {
            widget.onTapCallback();
          }
          setState(() {
            _wasTapped = true;
            _displayText = "Voted";
          });
        },
        child: Text("Vote for $_displayText"),
      ),
    );
  }
}

What can be concluded about the lifecycle of the VoteOnce widget?

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Social Media Data, Student Search, Product Details, Files Screen, Diary App.

Skills and topics tested

  • Flutter
  • Async-Await
  • Asynchronous Programming
  • Widgets
  • Conditional Rendering
  • Navigation
  • Layout

For job roles

  • Flutter Developer
  • Mobile Developer

Sample candidate report

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Simple, straight-forward technical testing

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