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About the test:

The NodeJS Online Test uses scenario-based MCQ questions to evaluate a candidate's ability to use Express.js as web application framework, handle REST API in Node, structure the Node application in modules, use NPM packages, connect to SQL/ Mongo databases and deploy node apps to production. The test uses code-tracing MCQ questions and coding questions to evaluate hands-on JavaScript programming skills.

Covered skills:

  • Node.js Module System
  • Debugging Node.js
  • REST APIs and web servers
  • Testing and releasing Node.js
  • Node Middlewares
  • In-depth express js framework
  • File System and Command Line Args
  • Asynchronous Node.js and promises
  • API Authentication and Security
  • NPM package system
  • Event Loop and Timers

9 reasons why
9 reasons why

Adaface Node.js Test is the most accurate way to shortlist Node JS Developers



Reason #1

Tests for on-the-job skills

The Node.js Online 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:

  • Understanding and implementing Node.js Module System
  • Working with File System and Command Line Args in Node.js
  • Proficient in Debugging Node.js applications
  • Handling Asynchronous operations in Node.js using Promises
  • Creating REST APIs and web servers using Node.js
  • Implementing API Authentication and Security in Node.js
  • Testing and releasing Node.js applications
  • Experience with NPM package system
  • Working with Node Middlewares
  • Understanding Event Loop and Timers in Node.js
  • In-depth knowledge of Express.js framework
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 Node.js Online Test will be non-googleable.

🧐 Question

Medium

I/O cycle and main module
Event Loop
Solve
Review the following NodeJS code:
 image
Pick the correct statements:

A: X will be logged after Y always
B: Y will be logged after X always
C: The order of executing timeout and immediate callbacks is non-deterministic and is bound by the performance of the process
D: In this case, the function calls are scheduled in the main module and not in the I/O cycle
E: In this case, the function calls are scheduled in the I/O cycle so setImmediate is always executed before any timers scheduled in the I/O phase, independently of how many timers are left

Easy

Res methods
Solve
If none of the methods (res.download, res.end, res.json, res.jsonp, res.redirect, res.render, res.send, res.sendFile, res.sendStatus) are called from a route handler to terminate request response cycle, what happens to the the client request?
A) Will be left hanging indefinitely

B) Will get an internal server error - 500 

C) Will get a service unavailable error - 503

D) Will be left hanging for a while and then request timeout error - 408

Medium

Phases and Timers
Event Loop
Solve
Review the following NodeJS code:
 image
Pick the correct statements:

A: Adaface will be logged after Lovelace.
B: Lovelace will be logged after Adaface.
C: Once the asyncOpThatTakes195ms completes reading the file, it starts executing the callback which takes 10 seconds. Only after this is finished, the event loop will execute the timers that are finished. So the timeout call back will actually be executed after 205 ms even though it is scheduled to be run after 200 ms
D: Once the asyncOpThatTakes195ms completes reading the file, it starts executing the callback. While executing the callback, the scheduled timer becomes ready to be executed. So the runtime executes the timer and then completes processing the callback.

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

I/O cycle and main module
Event Loop

2 mins

NodeJS
Solve

Easy

Res methods

3 mins

NodeJS
Solve

Medium

Phases and Timers
Event Loop

2 mins

NodeJS
Solve

Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
I/O cycle and main module
Event Loop
NodeJS
Medium2 mins
Solve
Res methods
NodeJS
Easy3 mins
Solve
Phases and Timers
Event Loop
NodeJS
Medium2 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 Node.js 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 Node.js 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 Node.js Assessment Test

Why you should use Pre-employment Node.js Online Test?

The Node.js 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 and utilizing the Node.js Module System
  • Proficiency in working with the File System and Command Line Args in Node.js
  • Effectively debugging Node.js applications
  • Working with asynchronous code in Node.js and utilizing promises
  • Developing and securing REST APIs and web servers with Node.js

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 Node.js Online Test?

  • Node.js Module System

    The Node.js module system is a way of organizing and reusing code in Node.js applications. It allows developers to define their own modules, as well as use built-in modules, to organize their code into separate files and directories. This skill is measured in the test to assess the candidate's understanding of how to properly structure and manage code using the module system.

  • File System and Command Line Args

    The file system and command line args are important aspects of Node.js development. Understanding how to interact with the file system enables developers to read, write, and manipulate files, which is crucial for many applications. Similarly, command line args allow developers to pass arguments to their Node.js applications, making them more flexible and customizable. This skill is measured in the test to evaluate the candidate's proficiency in working with the file system and command line args.

  • Debugging Node.js

    Debugging is a crucial skill for any developer, and Node.js is no exception. Being able to identify and fix bugs, trace program execution, and use debugging tools effectively is essential for developing reliable and efficient Node.js applications. This skill is measured in the test to assess the candidate's ability to debug and troubleshoot Node.js code.

  • Asynchronous Node.js and promises

    Asynchronous programming is a fundamental aspect of Node.js, allowing developers to efficiently handle concurrent operations and avoid blocking the event loop. Promises are a popular approach for managing asynchronous code in JavaScript, providing a way to handle success and failure cases. This skill is measured in the test to evaluate the candidate's proficiency in writing asynchronous Node.js code and working with promises.

  • REST APIs and web servers

    REST APIs and web servers are at the core of many modern web applications. Understanding how to design and implement RESTful APIs using Node.js allows developers to create scalable and efficient server-side applications. This skill is measured in the test to assess the candidate's knowledge of building REST APIs and web servers using Node.js.

  • API Authentication and Security

    API authentication and security are critical aspects of developing secure and reliable web applications. Having knowledge of various authentication mechanisms, such as token-based authentication and OAuth, and understanding common security vulnerabilities and countermeasures is essential for building secure Node.js applications. This skill is measured in the test to evaluate the candidate's understanding of API authentication and security best practices in the context of Node.js.

  • Testing and releasing Node.js

    Testing and releasing Node.js applications is vital to ensure their quality and reliability. Knowledge of various testing techniques, such as unit testing, integration testing, and end-to-end testing, as well as familiarity with tools and practices for continuous integration and deployment, is crucial for delivering high-quality Node.js applications. This skill is measured in the test to assess the candidate's proficiency in testing and releasing Node.js applications.

  • NPM package system

    The NPM package system is a central component of the Node.js ecosystem, allowing developers to easily manage and share reusable code packages. Understanding how to create, publish, and consume NPM packages, as well as managing dependencies effectively, is essential for efficient Node.js development. This skill is measured in the test to evaluate the candidate's knowledge of the NPM package system and their ability to work with external packages in Node.js applications.

  • Node Middlewares

    Node middlewares are functions that can handle incoming HTTP requests in an Express.js application. They allow for the modification of request and response objects, enabling features such as authentication, error handling, and request parsing. Understanding how to write and use middlewares is essential for building robust and scalable Node.js web applications. This skill is measured in the test to assess the candidate's proficiency in working with middlewares in Node.js applications.

  • Event Loop and Timers

    The event loop and timers are key components in the Node.js runtime environment. Understanding how the event loop works and how to utilize timers, such as setTimeout and setInterval, allows developers to efficiently manage asynchronous code execution and schedule tasks. This skill is measured in the test to evaluate the candidate's understanding of the event loop and timers in Node.js.

  • In-depth express js framework

    Express.js is a popular web application framework for Node.js, providing a robust set of features and tools for building web applications. Having in-depth knowledge of Express.js, including routing, middleware usage, error handling, and template engines, is crucial for developing scalable and maintainable Node.js web applications. This skill is measured in the test to assess the candidate's proficiency in working with the Express.js framework.

  • 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 Node.js Online Test to be based on.

    Module System
    Module Exports
    Module Imports
    File System
    Read Files
    Write Files
    Command Line Args
    Debugging
    Debugging Tools
    Asynchronous Operations
    Promises
    Async/Await
    REST APIs
    HTTP Methods
    Routing
    API Authentication
    Token-based Authentication
    Security
    Testing Node.js
    Unit Testing
    Integration Testing
    Releasing Node.js Application
    Semantic Versioning
    NPM Package System
    Package.json
    Dependencies
    DevDependencies
    Node Middlewares
    Express.js
    Body Parser
    Helmet
    Event Loop
    Timers
    setTimeout
    setInterval
    Express.js Routing
    Middlewares
    Template Engines
    Error Handling
    Route Params
    Query Params
    Request Body
    Response Status Codes
    CORS
    Error Handling Middleware
    Error Logging
    Custom Error Handling
    Authentication Middleware
    JWT
    Sessions
    Cookies
    Express.js Middleware
    Express.js Static Files
    Express.js Templating
    Route Middleware
    Express.js Error Handling
    Express.js Route Params
    Express.js Query Params
    Express.js Request Body

What roles can I use the Node.js Online Test for?

  • Node JS Developer
  • Senior Node JS Developer
  • Backend Node Developer
  • Senior Backend Node.JS Developer
  • Express.js Developer

How is the Node.js Online 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

  • Implementing API authentication and security measures in Node.js
  • Testing and releasing Node.js applications
  • Knowledge of the NPM package system and dependency management in Node.js
  • Implementing Node Middlewares in applications
  • In-depth understanding of the Event Loop and Timers in Node.js
  • Expertise in the express.js framework for building web applications

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

Node.js Hiring Test FAQs

Can I use this for evaluating TypeScript and NodeJS skills?

Yes. We can customize the assessment for TypeScript Node developers. You can check our standard TypeScript test to get a sense of what questions will be used to evaluate TypeScript skills. The final assessment will have MCQ questions to evaluate TypeScript, NodeJS and coding questions to evaluate hands-on JavaScript programming skills.

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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