Flutter Online Test

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The Flutter online test evaluates the candidate's knowledge of key concepts used to build UIs with Flutter.

It is an ideal test for pre-employment screening. A good Flutter developer is able to work with the Flutter framework to build high performance and user-friendly UIs.

The online test requires candidates to answer multiple choice and fill-in-the-blank questions about Flutter.

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Free Sample Questions for Flutter Test

Our sample questions are free for companies to use on a trial plan. See more about our premium questions for paid plans below.

Patient Name

5min
  -  
Easy 
  -  
MCA

Flutter Null Safety New Public

Consider the following code for a PatientNameDisplay widget in a hospital app made with Flutter:

class PatientNameDisplay extends StatefulWidget {
  final String patientName;
  final bool isAlive;
  PatientNameDisplay({this.patientName, this.isAlive});

  @override
  State<PatientNameDisplay> createState() => _PatientNameDisplayState();
}

class _PatientNameDisplayState extends State<PatientNameDisplay> {
  @override
  Widget build(BuildContext context) {
    return Text(
      (widget.patientName ?? "John Doe"),
      style: TextStyle(color: widget.isAlive ? Colors.blue : Colors.red),
    );
  }
}

The PatientNameDisplay widget defined above is used to display a patient's name. It has the following requirements:

  • The widget might receive patientName as null in the case of anonymous patients.
  • The widget will always receive the patient's status in the isAlive field.

Considering the requirements and the code above, what needs to be done to migrate the code to have sound null safety?

(Select all acceptable answers.)

Popup Ad

5min
  -  
Easy 
  -  
MCA

Flutter Layout Widgets New Public

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? 

(Select all acceptable answers.)

Voting App

7min
  -  
Easy 
  -  
MCA

Flutter Life Cycle Widgets New Public

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?

(Select all acceptable answers.)

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Premium Questions for Flutter Test

TestDome offers a premium questions library with 1000+ unique, hand-crafted questions whose answers can’t be found online. If you spot an answer somewhere online, we’ll give you a refund.

Question Names

These premium questions are included in this pre-built test and can be added to any multi-skill test. Please sign up for a paid plan to view the questions in detail.

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

Testing of these skills is covered in this pre-built test because they’re closely related. On our paid plan, you can easily create your own custom multi-skill tests.

Flutter Conditional Rendering Widgets Async-Await Asynchronous Programming Navigation Layout
Recommended Job Roles

These are the job roles that we recommend for the Flutter online test.

Flutter Developer
Mobile Developer

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