NPM Online Test

Q: What are the main JavaScript-related tests?

We offer several JavaScript-related tests: JavaScript Online Test JavaScript & HTML/CSS Test React.js Online Test JavaScript & NodeJS Test

The NPM Online Test evaluates candidates' proficiency in NPM package management Node.js fundamentals and JavaScript programming. It assesses knowledge of NPM commands package.json configuration dependency management Node.js modules and core JavaScript concepts. The test includes MCQs and coding questions to gauge practical skills in these areas.

Covered skills:

NPM Package Management
Dependency Management
Package.json Configuration
NPM CLI Commands
Node.js Fundamentals
Node.js Modules
Asynchronous JavaScript
Event Loop
JavaScript ES6+ Features
JavaScript Functions and Closures
Error Handling
JavaScript DOM Manipulation

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About the NPM Test

The NPM 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:

Able to efficiently handle exceptions and errors
Demonstrates understanding of folder structures and organization
Proficient in working with JSON data
Able to write effective queries for database manipulation
Ability to work with database concepts such as referencing and operators
Familiarity with database objects and their relationships
Skilled in working with URLs and handling URL parameters
Able to create and manipulate tables in a database

1200+ customers in 80 countries

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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 15,000+ questions. The actual questions on this NPM Online Test will be non-googleable.

🧐 Question
Medium I/O cycle and main module Event Loop Async/await Concurrency Exception Handling	Solve
Review the following NodeJS code: 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 Error Handling Troubleshooting	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 Asynchronous Programming Event Handling	Solve
Review the following NodeJS code: 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.
Medium Async Await Promises Promises Async-Await Asynchronous Programming	Solve
What will the following code output? 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: 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 Javascript Es6 Closure	Solve
What will the output of the following JavaScript code be?
Medium Promise Resolve Promises Async-Await Code Analysis Syntax Understanding	Solve
What does the following code output?
Easy Throw, Try, Async Promises Async-Await Async/await	Solve
What does the following JS code output?

	🧐 Question	🔧 Skill
	Medium I/O cycle and main module Event Loop Async/await Concurrency Exception Handling	2 mins NodeJS	Solve
Review the following NodeJS code: 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 Error Handling Troubleshooting	3 mins NodeJS	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 Asynchronous Programming Event Handling	2 mins NodeJS	Solve
Review the following NodeJS code: 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.
	Medium Async Await Promises Promises Async-Await Asynchronous Programming	2 mins JavaScript	Solve
What will the following code output? 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	2 mins JavaScript	Solve
Review the following JavaScript code and pick the correct options: 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 Javascript Es6 Closure	2 mins JavaScript	Solve
What will the output of the following JavaScript code be?
	Medium Promise Resolve Promises Async-Await Code Analysis Syntax Understanding	2 mins JavaScript	Solve
What does the following code output?
	Easy Throw, Try, Async Promises Async-Await Async/await	2 mins JavaScript	Solve
What does the following JS code output?

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	I/O cycle and main module Event Loop Async/await Concurrency Exception Handling	NodeJS	Medium	2 mins	Solve
Review the following NodeJS code: 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
	Res methods Error Handling Troubleshooting	NodeJS	Easy	3 mins	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
	Phases and Timers Event Loop Asynchronous Programming Event Handling	NodeJS	Medium	2 mins	Solve
Review the following NodeJS code: 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.
	Async Await Promises Promises Async-Await Asynchronous Programming	JavaScript	Medium	2 mins	Solve
What will the following code output? 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
	Bitcoin prices Axios Promises	JavaScript	Medium	2 mins	Solve
Review the following JavaScript code and pick the correct options: 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?
	My Module Scope Javascript Es6 Closure	JavaScript	Medium	2 mins	Solve
What will the output of the following JavaScript code be?
	Promise Resolve Promises Async-Await Code Analysis Syntax Understanding	JavaScript	Medium	2 mins	Solve
What does the following code output?
	Throw, Try, Async Promises Async-Await Async/await	JavaScript	Easy	2 mins	Solve
What does the following JS code output?

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Why you should use Pre-employment NPM Online Test?

The NPM 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:

Creating and maintaining folder structures in NPM
Working with JSON in NPM
Performing queries in NPM
Using databases in NPM
Referencing in NPM
Understanding and using operators in NPM
Manipulating database objects in NPM
Working with URLs in NPM
Managing tables in NPM
Handling exceptions and errors in NPM

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 NPM Online Test?

Folder structures: Folder structures refer to the organization and arrangement of files and directories within a computer system. In the context of this test, measuring this skill is important as it demonstrates the candidate's ability to effectively structure and organize their project files, ensuring clarity and maintainability.

JSON: JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. Assessing this skill in the test is crucial as it reflects the candidate's understanding of how to work with JSON data, manipulate and parse JSON objects, and use JSON formatting in web applications.

Queries: Queries involve retrieving specific data from a database using SQL. Evaluating this skill is important for recruiters as it measures the candidate's ability to construct and execute queries, demonstrating their proficiency in accessing and manipulating data efficiently.

Database: The database skill assesses the candidate's knowledge and understanding of managing relational databases, including creating, querying, and modifying database tables using SQL. Measuring this skill is important as it reflects the candidate's ability to work with database systems, design efficient database schemas, and perform data manipulation tasks.

Referencing: Referencing in programming refers to the ability to access and use data or objects that are stored in one location from another location. This skill is measured in the test to assess the candidate's capability to appropriately reference and utilize data or resources, showcasing their understanding of how to establish connections and relationships between different parts of a program.

Operators: Operators in programming are symbols or keywords that perform specific operations on operands. Measuring this skill in the test is important as it indicates the candidate's proficiency in using different operators to perform various calculations, comparisons, and logical operations, highlighting their ability to write efficient and effective code.

Database Objects: Database objects refer to the components that make up a database, such as tables, views, indexes, and stored procedures. Assessing this skill is important for recruiters as it reflects the candidate's understanding of the different database objects and their purpose, as well as their ability to create, modify, and manage these objects effectively.

URL: A URL (Uniform Resource Locator) is the address of a specific web resource, such as a webpage or a file. Evaluating this skill in the test is crucial as it measures the candidate's knowledge and understanding of how to work with URLs, including constructing and parsing URLs, handling query parameters, and navigating between webpages or resources.

Tables: Tables are one of the fundamental components of a relational database and are used to store and organize data in a structured manner. Measuring this skill is important as it demonstrates the candidate's understanding of how to create, modify, and manage database tables, including defining appropriate data types, constraints, and relationships, showcasing their ability to design and implement efficient database structures.

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 NPM Online Test to be based on.

Folder structures

JSON

Queries

Database

Referencing

Operators

Database Objects

URL

Tables

What roles can I use the NPM Online Test for?

Frontend Developer
Backend Developer
Full Stack Developer
Node.js Developer
JavaScript Developer
Web Application Developer
Software Engineer
DevOps Engineer
Build Engineer
Technical Lead

How is the NPM 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 authentication and authorization in NPM
Optimizing performance in NPM
Implementing caching mechanisms in NPM
Working with asynchronous code in NPM
Implementing security measures in NPM
Writing test cases for NPM applications
Configuring and deploying NPM applications
Troubleshooting and debugging NPM applications
Collaborating with team members using NPM
Managing project dependencies with NPM
Working with third-party libraries and plugins in NPM

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Have questions about the NPM Hiring Test?

What is NPM Online Test?

The NPM Online Test assesses candidates' proficiency in NPM package management, dependency management, package.json configuration, and NPM CLI commands. It is used by recruiters to identify candidates with strong NPM and Node.js skills.

Can I combine NPM Online Test with JavaScript questions?

Yes, recruiters can request a custom test that includes both NPM and JavaScript skills. Learn more about the JavaScript Online Test.

What topics are covered in the NPM Online Test?

The test covers skills like NPM Package Management, Dependency Management, Package.json Configuration, NPM CLI Commands, Node.js Fundamentals, Asynchronous JavaScript, Event Loop, JavaScript ES6+ Features, and more.

How to use the NPM Online Test in my hiring process?

Use it as a pre-screening tool in the initial hiring stage. You can add a link in your job post or invite candidates via email to take the test.

Can I test JavaScript and NodeJS together in a test?

Yes, you can combine JavaScript and NodeJS in a single test to get a holistic assessment of these skills. Check out the JavaScript & NodeJS Test.

What are the main JavaScript-related tests?

We offer several JavaScript-related tests:

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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Along with scorecards that report the performance of the candidate in detail, you also receive a comparative analysis against the company average and industry standards.

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