Search test library by skills or roles
⌘ K

About the test:

The Jest online test uses multiple-choice questions to evaluate candidates on their knowledge of Jest, which is a popular JavaScript testing framework used for testing React and Node.js applications. The test covers topics such as testing fundamentals, test-driven development, Jest configuration and setup, test matchers and assertions, mocking and spying, async testing, and snapshot testing. The test aims to evaluate candidates on their ability to write effective and maintainable test cases, debug and troubleshoot testing issues, and integrate Jest with other tools and frameworks.

Covered skills:

  • Data Layers
  • Initializers
  • Mocha Backends
  • Utility Layers
  • Statistical Layers
  • Test Execution
  • Computation Layer
  • CPU Backend with Native Extention

Try practice test
9 reasons why
9 reasons why

Adaface Jest Assessment Test is the most accurate way to shortlist Node.js Software Engineers



Reason #1

Tests for on-the-job skills

The Jest 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 effective and efficient Jest test cases
  • Ability to implement and utilize testing frameworks for JavaScript
  • Ability to work with data and statistics in testing
  • Ability to initialize and set up testing environments
  • Ability to execute tests and analyze results
  • Understanding of Mocha backends and its usage in testing
  • Understanding of computation layer and its role in testing
  • Ability to utilize utility layers in testing
  • Familiarity with CPU backend and native extensions
  • Understanding of data layers and their importance in testing
  • Knowledge of statistical layers and their significance in testing
  • Awareness of the role of initializers in testing
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
Try practice test
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 Jest Test will be non-googleable.

🧐 Question

Easy

Floating points
Try practice test
Check the following Jest tests:
 image
Which of the tests will pass?

Medium

Database testcase
Regression Testing
Try practice test
Adaface is developing a new database system called “Helen”. The tester at Adaface developed the following testcase for regression testing:
1. Open Helen
2. Open “Students” database
3. Enter data for “Sid”
4. Set checkpoint
5. Store “Sid” data in “Students” 
6. Restart Helen
7. Read “Sid” data from “Students”
8. Compare checkpoint with the contents
When the tester ran the testcase the first time, it worked as expected. Pick the correct statements:

A: When the test case is ran the second time, the data entry for “Sid” already exists in the database. 
B: When the test case is ran the second time, it performs exactly as it did the first time
C: The testcase is a good example for regression testing “Helen”
D: The testcase is not a good example for regression testing “Helen” since the system behaves differently when the testcase is ran the second time

Medium

Decision Table
Try practice test
Check the following decision table:
 image
What are the expected actions for following testcases?

I: Joey's age is 22. He is a smoker residing in India

II: Jennifer's age is 62. She is a non-smoker not residing in India

A) I - Insure, 10% discount. II - Insure, no discount
B) I - Don't insure. II - Don't insure
C) I - Insure, no discount. II - Don't insure
D) I - Insure, no discount. II - Insure, 10% discount

Easy

Cart Checkout
Incident Report
Try practice test
Review the following incident report written QA team of LWB, Little White Book (an e-commerce app):
1. Place any items in the cart (Say “Nike FST Men”).
2. Place any other (different) item in the shopping cart (Say “Nike Air Max”).
3. Remove “Nike FST Men” from the shopping cart, but leave “Nike Air Max” in the cart.
4. Click on “Check out” button.
5. Expect the app to display the check out screen, instead ‘No items in the shopping cart. Click continue to go back to shopping.’ error message is shown as a popup.
6. Click “Continue”.
7. Expect the app to go to shopping screen to add/remove items from the cart. Instead the app crashes. 
8. The error in steps 5 and 7 occurred in every attempt of 5 attempts (1 2 3 4 and 6).
Which of the following information is missing from the incident report?

Medium

Async Await Promises
Promises
Async-Await
Try practice test
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
Try practice test
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
Try practice test
What will the output of the following JavaScript code be?
 image
 image

Medium

Promise Resolve
Promises
Async-Await
Try practice test
What does the following code output? 
 image

Easy

Throw, Try, Async
Promises
Async-Await
Try practice test
What does the following JS code output?
 image
🧐 Question🔧 Skill

Easy

Floating points

2 mins

Jest
Try practice test

Medium

Database testcase
Regression Testing

2 mins

Testing
Try practice test

Medium

Decision Table

3 mins

Testing
Try practice test

Easy

Cart Checkout
Incident Report

2 mins

Testing
Try practice test

Medium

Async Await Promises
Promises
Async-Await

2 mins

JavaScript
Try practice test

Medium

Bitcoin prices
Axios
Promises

2 mins

JavaScript
Try practice test

Medium

My Module
Scope

2 mins

JavaScript
Try practice test

Medium

Promise Resolve
Promises
Async-Await

2 mins

JavaScript
Try practice test

Easy

Throw, Try, Async
Promises
Async-Await

2 mins

JavaScript
Try practice test
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Floating points
Jest
Easy2 mins
Try practice test
Database testcase
Regression Testing
Testing
Medium2 mins
Try practice test
Decision Table
Testing
Medium3 mins
Try practice test
Cart Checkout
Incident Report
Testing
Easy2 mins
Try practice test
Async Await Promises
Promises
Async-Await
JavaScript
Medium2 mins
Try practice test
Bitcoin prices
Axios
Promises
JavaScript
Medium2 mins
Try practice test
My Module
Scope
JavaScript
Medium2 mins
Try practice test
Promise Resolve
Promises
Async-Await
JavaScript
Medium2 mins
Try practice test
Throw, Try, Async
Promises
Async-Await
JavaScript
Easy2 mins
Try practice test
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

Try practice test
Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Jest 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 Jest 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
Try practice test
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 Jest Online Test

Why you should use Pre-employment Jest Test?

The Jest 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:

  • Proficiency in using Jest for test automation and writing test cases
  • Expertise in testing methodologies and best practices
  • In-depth knowledge of JavaScript and its fundamentals
  • Ability to work with data layers in software development
  • Experience with statistical layers and their integration into systems
  • Understanding of initializers and their role in application setup
  • Skilled in executing and analyzing test results
  • Familiarity with Mocha backends for running test suites
  • Proficient in working with computation layers in software systems
  • Knowledge of utility layers and their impact on system performance

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 Jest Test?

  • Data Layers

    Data Layers in software development refer to the components or frameworks responsible for storing, retrieving, and manipulating data. This skill is measured in the test to assess the candidate's understanding and proficiency in data management and storage techniques.

  • Statistical Layers

    Statistical Layers involve the use of statistical models and algorithms to analyze data and extract meaningful insights. This skill is important to measure as it assesses the candidate's ability to apply statistical techniques in data analysis and decision-making.

  • Initializers

    Initializers in software development are functions or code blocks that are executed to initialize the state or setup of a program or application. This skill is measured to evaluate the candidate's understanding of initialization processes to ensure correct program initialization and setup.

  • Test Execution

    Test Execution refers to the process of running and validating test cases against software or systems. Measuring this skill helps assess the candidate's ability to effectively execute tests, identify and report bugs, and ensure the quality and reliability of the software.

  • Mocha Backends

    Mocha Backends are testing frameworks used in JavaScript for writing and executing test cases. This skill is measured to evaluate the candidate's knowledge of Mocha and their proficiency in setting up test environments and writing test cases using Mocha in JavaScript.

  • Computation Layer

    The Computation Layer refers to the components or modules responsible for performing complex computations or calculations in software systems. This skill is important to measure as it assesses the candidate's ability to design and implement efficient algorithms and perform high-performance computations.

  • Utility Layers

    Utility Layers in software development are modules or components that provide common functionalities or tools to support the main functionality of an application. This skill is measured to evaluate the candidate's understanding and experience in creating and using utility modules to enhance the functionality and maintainability of software systems.

  • CPU Backend with Native Extension

    CPU Backend with Native Extension refers to the integration of CPU-centric processing capabilities and native extensions in software systems. This skill is measured to assess the candidate's expertise in optimizing code performance by utilizing CPU-specific optimizations and incorporating native extensions for increased efficiency and speed.

  • 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 Jest Test to be based on.

    Jest Basics
    Jest Matchers
    Jest Mocking
    Jest Configuration
    Unit Testing
    Integration Testing
    Data Manipulation
    Data Validation
    Data Storing
    Data Retrieval
    Statistical Analysis
    Statistical Modeling
    Statistical Visualization
    Computation Concepts
    Computation Algorithms
    Computation Optimization
    Initializer Implementation
    Initializer Configuration
    Test Execution Lifecycle
    Test Result Analysis
    Mocha Configuration
    Mocha Test Suites
    Mocha Hooks
    Utility Functions
    Utility Libraries
    CPU Backend Usage
    Native Extension Integration
    Async Testing
    Edge Case Testing
    Test Coverage Analysis
    Code Performance Measurement
    Error Handling
    Test Debugging
    Test Reporting
    Testing Principles
    Testing Methodologies
    Testing Documentation
    Continuous Integration
    Test Automation
    Code Refactoring
    Code Reviewing
    Coding Best Practices
    Test-driven Development
    Behavior-driven Development
    Code Quality Assessment
    Security Testing
    UI Testing
    API Testing
    Functional Testing
    Regression Testing
    Exploratory Testing
    Performance Testing
    Load Testing
    Accessibility Testing
    Cross-browser Testing
    Cross-platform Testing
    Mobile Testing
Try practice test

What roles can I use the Jest Test for?

  • Node.js Software Engineer
  • Front-End Developer

How is the Jest Test 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

  • Expertise in CPU backends with native extensions
  • Solid understanding of software architecture and design patterns
  • Ability to write efficient and maintainable code
  • Experience with version control systems like Git
  • Knowledge of continuous integration and continuous delivery processes
  • Familiarity with debugging techniques and tools
  • Understanding of software testing frameworks and libraries
  • Ability to write clear and concise technical documentation
  • Strong problem-solving and analytical skills
  • Effective communication and collaboration skills
  • Adaptability to new technologies and frameworks
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

Jest Hiring Test FAQs

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.

customers across world
Join 1200+ companies in 75+ countries.
Try the most candidate friendly skills assessment tool today.
g2 badges
Ready to use the Adaface Jest Test?
Ready to use the Adaface Jest Test?
logo
40 min tests.
No trick questions.
Accurate shortlisting.
Terms Privacy Trust Guide

🌎 Pick your language

English Norsk Dansk Deutsche Nederlands Svenska Français Español Chinese (简体中文) Italiano Japanese (日本語) Polskie Português Russian (русский)
ada
Ada
● Online
✖️