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React Native Online Test (React Native + JavaScript)

About the test:

The React Native Test uses scenario-based MCQ questions to evaluate a candidate's ability to build interactive, media-rich React Native applications and publish them using Google/ App stores. The questions assess core React Native concepts (components, state and props), state management fundamentals, accessing native features and proper usage of RESTful APIs. The test also has MCQs and coding questions to evaluate hands-on JavaScript programming skills.

Covered skills:

  • Core React Native (components; state; props)
  • Handling screen layouts
  • Rendering scrollable and custom Lists
  • Navigation between screens
  • In-App Authentication
  • Debugging React Native apps
  • Publishing to Apple and Play stores
  • Functional components and Hooks
  • Styled-components
  • State management in components
  • Asynchronous APIs
  • Responsive designs
  • Persistence and Session Storage

9 reasons why
9 reasons why

Adaface React Native Online Test (React Native + JavaScript) is the most accurate way to shortlist React Native Developers



Reason #1

Tests for on-the-job skills

The React Native Online Test (React Native + JavaScript) 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:

  • Proficient in React Native components, state, and props
  • Experience with functional components and Hooks
  • Ability to handle screen layouts effectively
  • Familiarity with Styled-components
  • Capability to render scrollable and custom lists
  • Competent in state management within components
  • Knowledge of navigation between screens
  • Understanding of asynchronous APIs
  • Proficiency in in-app authentication
  • Ability to create responsive designs
  • Skills in debugging React Native apps
  • Understanding of persistence and session storage
  • Knowledge of publishing to Apple and Play stores
Reason #2

No trick questions

no trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface
Reason #3

Non-googleable 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 10,000+ questions. The actual questions on this React Native Online Test will be non-googleable.

🧐 Question

Medium

Fallback Error
Error Boundaries
Solve
Review the following React Native Code:
 image
We have two ErrorBoundary classes. Notice that both MyComponent and ErrorBoundaryOne throw errors. What ‘Text’ would be rendered in the screen?

Easy

Flex
Solve
What is the best way to create following React Native layout with containers 1,2,3?
 image
 image

Medium

Home and Details Screen
Navigation
Solve
Review the following React Native code:
 image
The app has two screens (Home and Details) as shown below:
 image
 image
Review the following tests:

Test 1 - Click on ‘Navigate.navigate(’Details’)’ button on Home screen, then the same button on the Details screen. Then click on the “back” button of the device/screen.

Test 2 - Click on ‘Navigate.push(’Details’)’ button on Home screen, then the same button on the Details screen. Then we clicked on the “back” button of the device/screen.

Test 3 -  Click on ‘Navigate.navigate(’Details’)’ button on Home screen, then ‘Navigate.push(’Details’)’ button on the Details screen. Then click on the “back” button of the device/ screen.

Test 4 -  Click on ‘Navigate.push(’Details’)’ button on Home screen, then ‘Navigate.navigate(’Details’)’ button on the Details screen. Then click on the “back” button of the device/ screen.
Pick the correct statements:

Medium

Async Await Promises
Promises
Async-Await
Solve
What will the following code output?
 image
A: 24 after 5 seconds and after another 5 seconds, another 24
B: 24 followed by another 24 immediately
C: 24 immediately and another 24 after 5 seconds
D: After 5 seconds, 24 and 24
E: Undefined
F: NaN
G: None of these

Medium

Bitcoin prices
Axios
Promises
Solve
Review the following JavaScript code and pick the correct options: 
 image
Assume that the API returns a successful 200 response code and a JSON object as the response body. What would the value of ‘a’ be after the code is executed?

Medium

My Module
Scope
Solve
What will the output of the following JavaScript code be?
 image
 image

Medium

Promise Resolve
Promises
Async-Await
Solve
What does the following code output? 
 image

Easy

Throw, Try, Async
Promises
Async-Await
Solve
What does the following JS code output?
 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

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

Fallback Error
Error Boundaries

3 mins

React Native
Solve

Easy

Flex

2 mins

React Native
Solve

Medium

Home and Details Screen
Navigation

3 mins

React Native
Solve

Medium

Async Await Promises
Promises
Async-Await

2 mins

JavaScript
Solve

Medium

Bitcoin prices
Axios
Promises

2 mins

JavaScript
Solve

Medium

My Module
Scope

2 mins

JavaScript
Solve

Medium

Promise Resolve
Promises
Async-Await

2 mins

JavaScript
Solve

Easy

Throw, Try, Async
Promises
Async-Await

2 mins

JavaScript
Solve

Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Fallback Error
Error Boundaries
React Native
Medium3 mins
Solve
Flex
React Native
Easy2 mins
Solve
Home and Details Screen
Navigation
React Native
Medium3 mins
Solve
Async Await Promises
Promises
Async-Await
JavaScript
Medium2 mins
Solve
Bitcoin prices
Axios
Promises
JavaScript
Medium2 mins
Solve
My Module
Scope
JavaScript
Medium2 mins
Solve
Promise Resolve
Promises
Async-Await
JavaScript
Medium2 mins
Solve
Throw, Try, Async
Promises
Async-Await
JavaScript
Easy2 mins
Solve
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!


Brandon Lee, Head of People, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment React Native Online Test in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests
Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the React Native Online Test from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

invite candidates
Reason #7

Detailed scorecards & benchmarks

View sample scorecard
Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

test completion rate
Reason #9

Advanced Proctoring


Learn more

About the React Native Online Test (React Native + JavaScript)

Why you should use React Native Online Test (React Native + JavaScript)?

The React Native Online Test makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

  • Understanding of core React Native concepts such as components, state, and props.
  • Proficiency in functional components and Hooks.
  • Ability to handle screen layouts effectively.
  • Experience with styled-components for styling React Native components.
  • Knowledge of rendering scrollable and custom lists in React Native.
  • Strong understanding of state management in React Native components.
  • Familiarity with navigation between screens in React Native.
  • Experience with asynchronous APIs in React Native.
  • Proficiency in implementing in-app authentication in React Native.
  • Ability to create responsive designs in React Native.

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the React Native Online Test (React Native + JavaScript)?

  • Core React Native

    Core React Native involves understanding the fundamental building blocks of React Native such as components, states, and props. It is essential to measure this skill in the test to ensure that candidates have a strong foundation in React Native development.

  • Functional components and Hooks

    Functional components and Hooks allow developers to write more concise and reusable code in React Native. Including this skill in the test helps to assess a candidate's ability to leverage these modern React features for better code organization and performance.

  • Handling screen layouts

    Handling screen layouts is crucial for creating intuitive and user-friendly mobile applications. This skill is measured in the test to evaluate a candidate's understanding of creating responsive layouts and handling different screen sizes in React Native.

  • Styled-components

    Styled-components enable developers to write CSS-in-JS to style React Native components. Assessing this skill helps determine a candidate's proficiency in using styled-components for efficient and maintainable styling in React Native applications.

  • Rendering scrollable and custom Lists

    Rendering scrollable and custom lists is a common requirement in mobile applications. Measuring this skill in the test ensures that candidates can efficiently render and manage lists of data in React Native for optimal performance and user experience.

  • State management in components

    State management is crucial for building complex and interactive React Native applications. Evaluating this skill helps gauge a candidate's ability to effectively manage state within React Native components using techniques like useState or useContext.

  • Navigation between screens

    Navigation between screens is an essential part of mobile app development. This skill is evaluated to assess a candidate's understanding of implementing navigation in React Native using libraries like React Navigation, allowing seamless transitions between different screens.

  • Asynchronous APIs

    Asynchronous APIs are commonly used in mobile app development for handling network requests, data fetching, and more. Including this skill in the test helps measure a candidate's knowledge of working with asynchronous operations in React Native using concepts like promises or asynchronous/await syntax.

  • In-App Authentication

    In-App Authentication is an important skill to evaluate a candidate's familiarity with implementing secure user authentication within React Native applications. It measures their understanding of authentication flows, token management, and integrating with authentication services like OAuth or Firebase Authentication.

  • Responsive designs

    Responsive designs are crucial for creating mobile applications that adapt to different screen sizes and orientations. Assessing this skill ensures that candidates can build React Native apps that provide a consistent and optimal user experience across various devices.

  • Debugging React Native apps

    Debugging skills are essential for identifying and fixing issues in React Native applications. Measuring this skill helps evaluate a candidate's proficiency in utilizing React Native debugging tools, troubleshooting common errors, and ensuring the smooth functioning of their applications.

  • Persistence and Session Storage

    Persistence and session storage involve saving data locally in a React Native application to provide a seamless user experience. Evaluating this skill helps determine a candidate's ability to implement data persistence using techniques like AsyncStorage or SQLite for secure and efficient data storage and retrieval.

  • Publishing to Apple and Play stores

    Publishing to Apple and Play stores is the final step in bringing a React Native app to users. This skill assesses a candidate's understanding of the app submission process, including app signing, store guidelines, and configuring the necessary build settings to successfully publish an app on both platforms.

  • Full list of covered topics

    The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for React Native Online Test to be based on.

    React Native components
    State
    Props
    Functional components
    Hooks
    Screen layouts
    Styled-components
    Scrollable lists
    Custom lists
    State management
    Navigation
    Asynchronous APIs
    In-app authentication
    Responsive designs
    Debugging
    Persistence
    Session storage
    Publishing
    Apple Store
    Play Store
    Core React Native
    Handling exceptions
    Error handling
    Component lifecycle
    JSON parsing
    Data binding
    Form validation
    Event handling
    Props validation
    Prop drilling
    Higher-order components
    Redux
    Redux Saga
    MobX
    React Navigation
    React Navigation v5
    React Navigation v6
    FlatList
    SectionList
    VirtualizedList
    AsyncStorage
    NetInfo
    React Native Debugger
    Performance optimization
    Localization
    Push notifications
    App deployment
    App signing
    Error monitoring
    Unit testing
    Integration testing
    End-to-end testing
    Code signing
    Continuous integration
    Continuous deployment
    React Native CLI
    Expo CLI

What roles can I use the React Native Online Test (React Native + JavaScript) for?

  • React Native Developer
  • React Native Mobile Developer
  • React Native iOS Developer
  • Senior Software Developer (React Native)
  • React Native Engineer
  • Android Developer (React Native)
  • React Native Lead
  • Senior Mobile Developer (React Native)

How is the React Native Online Test (React Native + JavaScript) customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

  • Skilled in debugging React Native apps.
  • Knowledge of persistence and session storage in React Native.
  • Proficiency in publishing React Native apps to Apple and Play stores.
  • Expertise in handling exceptions and errors in React Native.
  • Ability to integrate third-party libraries and packages in React Native projects.
  • Experience with implementing push notifications in React Native.
  • Familiarity with implementing animations and transitions in React Native.
  • Knowledge of offline and caching strategies in React Native.
  • Ability to optimize performance in React Native apps.

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

Singapore government logo

The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.


85%
reduction in screening time

React Native Online Test (React Native + JavaScript) FAQs

Can I evaluate JavaScript and React Native skills in the same assessment?

Yes. You can check our standard JavaScript test to get a sense of JavaScript questions.

Can I evaluate Android and React Native skills in the same assessment?

Yes. You can evaluate Android and React Native skills in the same assessment. You can review our standard Android test to get a sense of what kind of questions will be included. The final assessment will include questions to evaluate JavaScript, Android, React Native and coding skills in the same test.

Can I evaluate iOS and React Native skills in the same assessment?

Yes. You can evaluate iOS and React Native skills in the same assessment. You can review our standard iOS test to get a sense of what kind of questions will be included. The final assessment will include questions to evaluate JavaScript, iOS, React Native and coding skills in the same test.

Can I combine multiple skills into one custom assessment?

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.

Do you have any anti-cheating or proctoring features in place?

We have the following anti-cheating features in place:

  • Non-googleable questions
  • IP proctoring
  • Screen proctoring
  • Web proctoring
  • Webcam proctoring
  • Plagiarism detection
  • Secure browser
  • Copy paste protection

Read more about the proctoring features.

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.

What experience level can I use this test for?

Each Adaface assessment is customized to your job description/ ideal candidate persona (our subject matter experts will pick the right questions for your assessment from our library of 10000+ questions). This assessment can be customized for any experience level.

Does every candidate get the same questions?

Yes, it makes it much easier for you to compare candidates. Options for MCQ questions and the order of questions are randomized. We have anti-cheating/ proctoring features in place. In our enterprise plan, we also have the option to create multiple versions of the same assessment with questions of similar difficulty levels.

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.

What is the cost of using this test?

You can check out our pricing plans.

Can I get a free trial?

Yes, you can sign up for free and preview this test.

I just moved to a paid plan. How can I request a custom assessment?

Here is a quick guide on how to request a custom assessment on Adaface.

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40 min tests.
No trick questions.
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