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Flutter & Dart Test

The Flutter and Dart Online test uses scenario-based MCQ questions to evaluate candidates' ability to design, build and debug adaptive Flutter Apps. The questions assess their experience using Flutter Widgets, navigating between multiple screens, handling user inputs, using Native device features such as camera, location and publishing to App stores. The test also has code-tracing MCQ questions to evaluate candidates' knowledge of the Dart programming language used in developing Flutter Apps.

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Screen candidates with a 45 mins test

Test duration:  45 mins
Difficulty level:  Moderate
Availability:  Ready to use
Questions:
  • 7 Flutter MCQs
  • 5 Dart MCQs
  • 1 Dart Coding Question
Covered skills:
Dart programming
Dart OOPs
Flutter internals
Flutter built-in and custom widgets
State management
Handling forms and media
Networking and handling data
Animations and transitions
Navigation between screens
Debugging and testing
Publishing and distribution
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Use the Flutter & Dart Assessment Test to shortlist qualified candidates

The Flutter & Dart Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

  • Ability to write efficient and clean Dart code
  • Understanding of object-oriented programming principles in Dart
  • Knowledge of Flutter internals and framework architecture
  • Proficiency in using built-in and custom Flutter widgets
  • Ability to manage state effectively in Flutter applications
  • Experience in handling forms and media in Flutter
  • Understanding of networking concepts and data handling in Flutter
  • Ability to create animations and transitions in Flutter
  • Knowledge of navigating between screens in Flutter
  • Proficiency in debugging and testing Flutter applications
  • Understanding of the publishing and distribution process in Flutter
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Screen candidates with the highest quality questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

These are just a small sample from our library of 15,000+ questions. The actual questions on this Flutter & Dart Test will be non-googleable.

🧐 Question

Medium

Analyzing StreamBuilder
StreamBuilder
ListView
Solve
Consider the below code:
 image
Analyze the given pseudocode and determine what will be displayed on the screen after the second emission of Stream (after 2 seconds).
A: CircularProgressIndicator will be displayed.
B: A ListView with 3 ListTile widgets, each displaying one item from the list ['Item1', 'Item2', 'Item3'].
C: Text widget with 'No Items Available' will be displayed.
D: A ListView with 0 ListTile widgets.
E: The code will throw an error.

Medium

Handling Push Notifications
Push Notifications
Application State
Solve
In a Flutter application, you are using the firebase_messaging package to handle incoming FCM (Firebase Cloud Messaging) push notifications. Consider the pseudocode below:
 image
In the _handleNotification method, the application is supposed to navigate to a details page if the action key in the notification data is equal to 'navigate'. However, this might not work as expected if the app is in the background or terminated state when the notification is received and the user clicked on it.

How would you modify the _handleNotification method or handle the onMessage event to ensure that the navigation occurs when the user taps on the notification to open the app, no matter what state the app is in when the notification is received?
A: Use _firebaseMessaging.onMessageOpenedApp to handle navigation when the user taps the notification to open the app.
B: Use _firebaseMessaging.onLaunch to handle the navigation when the user taps the notification.
C: Check the message.messageType and navigate only if it is 'opened'.
D: Use _firebaseMessaging.onBackgroundMessage for handling navigation when the app is in the background.
E: Use a GlobalKey<NavigatorState> to handle navigation in _handleNotification.

Medium

Sliders
Widgets
Solve
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?
 image
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

Medium

Stateless and Stateful Widgets
Stateless Widgets
Stateful Widgets
Lifecycle Methods
Solve
Consider the following pseudocode:
 image
Review the pseudocode. What will be the output in the console when the application starts, the user clicks the 'Navigate' button to navigate to AnotherScreen and then navigates back to the ParentWidget?
 image

Medium

Vertical Wrap
UI Layout
Solve
Review the following Flutter code:
 image
The code produces the following UI:
 image
What will the UI look like if we add following properties to Wrap widget (after line 29):

textDirection: TextDirection.rtl
direction: Axis.vertical
 image

Medium

Async Await
Asynchronous Programming
Solve
Review the following Dart code:
 image
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 // #
 image

Easy

Iterable Sync
Asynchronous Programming
Solve
What would the following Dart code print?
 image

Medium

Method Overriding
Constructors
Inheritance
Method Overriding
Solve
Consider the following Dart code:
 image
What will be the output of the above Dart code?
 image

Easy

Registration Queue
Logic
Queues
Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount.
For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition.
⚠️⚠️⚠️ Note:
- The first line of the input is the length of the array. The second line contains all the elements of the array.
- The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function.
- You need to "print" the final result (not return it) to pass the test cases.

For the example discussed above, the input will be:
5
20 70 -40 30 -10

Your code needs to print the following to the standard output:
20 70 30 -40 -10

Hard

Find the customer with the most spend 2
JOIN
GROUP BY
ORDER BY
Solve
Given details of customers, products, and sales, write a SQL query to find the customer with the highest spend. The customer with the highest spend is the one who has spent the most money on purchases. The query should return the full name of the customer and the total amount spent by the customer rounded off to the nearest integer.
full_name is the concatenation of first_name and last_name separated by a space. Eg:
first_name = 'Alice', last _name = 'Brown' => full_name = 'Alice Brown'
You can assume that there will always be non-empty first_name and non-empty last_name entries for all customers in the table.
 image

Medium

Visitors Count
Strings
Logic
Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. 
Example:

Input:
WWMMWWCCC

Expected Output: 
4W3C2M

Explanation: 
‘W’ has the highest count, then ‘C’, then ‘M’. 
⚠️⚠️⚠️ Note:
- The input is already parsed and passed to a function.
- You need to "print" the final result (not return it) to pass the test cases.
- If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’.
- If any of them have the same count, the output should follow this order - M, W, C.
🧐 Question🔧 Skill

Medium

Analyzing StreamBuilder
StreamBuilder
ListView

3 mins

Flutter
Solve

Medium

Handling Push Notifications
Push Notifications
Application State

2 mins

Flutter
Solve

Medium

Sliders
Widgets

4 mins

Flutter
Solve

Medium

Stateless and Stateful Widgets
Stateless Widgets
Stateful Widgets
Lifecycle Methods

2 mins

Flutter
Solve

Medium

Vertical Wrap
UI Layout

3 mins

Flutter
Solve

Medium

Async Await
Asynchronous Programming

3 mins

Dart
Solve

Easy

Iterable Sync
Asynchronous Programming

2 mins

Dart
Solve

Medium

Method Overriding
Constructors
Inheritance
Method Overriding

2 mins

Dart
Solve

Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Hard

Find the customer with the most spend 2
JOIN
GROUP BY
ORDER BY

10 mins

SQL
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Analyzing StreamBuilder
StreamBuilder
ListView
Flutter
Medium3 mins
Solve
Handling Push Notifications
Push Notifications
Application State
Flutter
Medium2 mins
Solve
Sliders
Widgets
Flutter
Medium4 mins
Solve
Stateless and Stateful Widgets
Stateless Widgets
Stateful Widgets
Lifecycle Methods
Flutter
Medium2 mins
Solve
Vertical Wrap
UI Layout
Flutter
Medium3 mins
Solve
Async Await
Asynchronous Programming
Dart
Medium3 mins
Solve
Iterable Sync
Asynchronous Programming
Dart
Easy2 mins
Solve
Method Overriding
Constructors
Inheritance
Method Overriding
Dart
Medium2 mins
Solve
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Find the customer with the most spend 2
JOIN
GROUP BY
ORDER BY
SQL
Hard10 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve

Test candidates on core Flutter & Dart Hiring Test topics

Dart programming: Dart programming is a language specifically designed for building and developing applications, with features such as a static type system, object-oriented programming, and support for asynchronous programming. This skill is measured in this test to assess the candidate's ability to write clean and efficient Dart code, ensuring the reliability and maintainability of their Flutter applications.

Dart OOPs: Dart OOPs (Object-Oriented Programming) refers to the paradigm used in Dart programming that focuses on organizing code into reusable and modular objects. This skill is measured in the test to evaluate the candidate's understanding of encapsulation, inheritance, polymorphism, and abstraction, which are essential concepts in building robust and scalable Flutter applications.

Flutter internals: Flutter internals involve understanding the underlying architecture and mechanisms of the Flutter framework. This skill is measured in the test to assess the candidate's knowledge of how Flutter works, including the widget tree hierarchy, rendering pipeline, and event handling. It ensures that the candidate can optimize their Flutter apps and troubleshoot performance issues effectively.

Flutter built-in and custom widgets: Flutter provides a rich set of built-in widgets and allows developers to create custom widgets. This skill is measured in the test to evaluate the candidate's familiarity with the wide range of pre-built Flutter widgets and their ability to create custom widgets to suit specific design and functionality requirements. It demonstrates the candidate's expertise in leveraging Flutter's powerful UI capabilities.

State management: State management in Flutter involves managing the data and the UI state of an application. This skill is measured in the test to assess the candidate's proficiency in implementing different state management patterns, such as ScopedModel, Provider, Redux, and Bloc, to effectively handle complex UI interactions and data flow in Flutter apps.

Handling forms and media: Handling forms and media in Flutter includes validating user input, capturing and processing form data, and working with different media types like images and videos. This skill is measured in the test to evaluate the candidate's ability to implement form handling and media manipulation techniques, ensuring a smooth and error-free user experience in Flutter applications.

Networking and handling data: Networking and handling data in Flutter involves making API requests, parsing and serializing JSON, and managing local data storage. This skill is measured in the test to assess the candidate's competency in implementing data fetching and persistence mechanisms, ensuring seamless communication between Flutter apps and backend services.

Animations and transitions: Animations and transitions in Flutter bring life and interactivity to the user interface. This skill is measured in the test to evaluate the candidate's knowledge of Flutter's animation framework and their ability to create smooth and visually appealing animations and transitions that enhance the user experience in Flutter applications.

Navigation between screens: Navigation between screens in Flutter involves controlling the flow of the user interface by navigating between different screens or pages. This skill is measured in the test to assess the candidate's understanding of Flutter's navigation system and their ability to implement efficient screen navigation and routing logic in Flutter apps.

Debugging and testing: Debugging and testing in Flutter is the process of identifying and fixing bugs, as well as verifying the correctness and stability of the code. This skill is measured in the test to evaluate the candidate's proficiency in using Flutter's debugging and testing tools, ensuring the quality and reliability of their Flutter applications.

Publishing and distribution: Publishing and distribution in Flutter involves preparing and deploying applications to various platforms, such as iOS and Android. This skill is measured in the test to assess the candidate's knowledge of the app submission process, including code signing, provisioning profiles, and publishing guidelines, ensuring that they can successfully release their Flutter apps to the intended target audience.

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Have questions about the Flutter & Dart Hiring Test?

How does pricing work?

You can check out our pricing plans.

Can I customize the test?

Yes, absolutely. Custom assessments are set up within 48 hours based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test. You can also customize a test by uploading your own questions.

Can I combine multiple skills into one test?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

What roles can I use the Flutter & Dart Assessment Test for?

Here are few roles for which we recommend this test:

  • Flutter Developer
  • Mobile Flutter Developer
  • Software Engineer
  • Fresher Flutter Developer
Can I see a sample test, or do you have a free trial?

Yes!

The free trial includes one sample technical test (Java/ JavaScript) and one sample aptitude test that you will find in your dashboard when you sign up. You can use it to review the quality of questions and the candidate experience of giving a test on Adaface.

You can preview any of the 500+ tests and see the sample questions to decide if it would be a good fit for your requirements.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

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