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

5 min

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:

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

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

5 min
Null Safety

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});

  State<PatientNameDisplay> createState() => _PatientNameDisplayState();

class _PatientNameDisplayState extends State<PatientNameDisplay> {
  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?

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5 more premium Flutter questions

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

Skills and topics tested

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

For job roles

  • Flutter Developer
  • Mobile Developer

Sample candidate report

What others say

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Simple, straight-forward technical testing

TestDome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.

Jan Opperman, Grindrod Bank

Product reviews

G2 - Crowd Badge
G2 - High Performer (2022)
Capterra - 4.5 Stars
Capterra - Shortlist (2022)

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