ExpressJS Test

Q: What are the main JavaScript-related tests?

We offer various JavaScript-related tests, including: JavaScript Online Test JavaScript & NodeJS Test JavaScript & React Test JavaScript & Vue Test

The ExpressJS Test evaluates a candidate's knowledge and skills in using ExpressJS, Node.js, and Javascript for web development. It covers topics such as routing, middleware, handling requests and responses, working with databases, and building APIs.

Covered skills:

Routing in Express
Setting up Express application
Serving Static Files in Express
Routing in Express
Creating and Using Middlewares in Express
Using Template Engines
Debugging Express
Node.js Fundamentals
Javascript Coding

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About the ExpressJS Assessment Test

The ExpressJS 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 set up and configure an Express.js application
Knowledge of routing in Express.js for handling different endpoints
Understanding of serving static files in Express.js
Experience in creating and using middlewares in Express.js
Ability to use template engines for dynamic content in Express.js
Proficiency in debugging Express.js applications
Understanding of Node.js fundamentals
Strong knowledge of JavaScript coding
Experience in handling exceptions and errors
Capability of optimizing performance in Express.js applications

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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 ExpressJS 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 ExpressJS Test?

The ExpressJS 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:

Routing in Express
Setting up Express application
Serving Static Files in Express
Creating and Using Middlewares in Express
Using Template Engines
Debugging Express
Node.js Fundamentals
Javascript Coding
Authentication and Authorization in Express
Database Integration in Express

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 ExpressJS Test?

Routing in Express: Routing in Express refers to how the application handles different HTTP requests and directs them to the appropriate route. It essentially maps the requested URL to the corresponding handler function or middleware, making it a crucial skill for building dynamic web applications.

Setting up Express application: Setting up an Express application involves installing the necessary dependencies, configuring the application settings, and creating the basic file structure. This skill is important because it lays the foundation for developing and running an Express application.

Serving Static Files in Express: Serving static files in Express allows the application to serve HTML, CSS, JavaScript, and other static files to the client. It ensures that the web pages are properly rendered and the necessary assets are loaded, making it an essential skill for web development.

Creating and Using Middlewares in Express: Middlewares in Express are functions that have access to the request and response objects. They can be used to add functionality, perform validation, handle errors, and more. Being able to create and use middlewares is important for building robust and scalable applications.

Using Template Engines: Template engines in Express allow for the dynamic generation of HTML pages by combining templates with data. They simplify the process of rendering HTML on the server and enable code reuse. Understanding and using template engines is crucial for developing dynamic web applications.

Debugging Express: Debugging Express involves identifying and fixing issues or errors in the application code. It requires understanding the error messages, using debugging tools, and troubleshooting the code to ensure smooth operation. Being proficient in debugging Express applications is necessary to deliver high-quality software.

Node.js Fundamentals: Node.js fundamentals encompass the core concepts and features of Node.js, including event-driven architecture, non-blocking I/O, modules, and file system operations. Knowledge of Node.js fundamentals is important as Express.js is built on top of Node.js and understanding how it works under the hood helps in building efficient applications.

Javascript Coding: Javascript coding refers to the ability to write clean, efficient, and maintainable code using the Javascript programming language. Strong Javascript coding skills are essential for developing server-side applications using Express.js and effectively utilizing the various features and functionalities it offers.

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 ExpressJS Test to be based on.

Routing

Middleware

Static Files

Template Engines

Debugging

Node.js

JavaScript

Express.js Setup

Express.js Configuration

GET Requests

POST Requests

URL Parameters

Query Parameters

Route Handlers

Middleware Functions

Error Handling Middleware

Serving Static Files

Static File Middleware

Template Engines in Express.js

Data Binding

Layouts and Partials

Debugging Techniques

Node.js Basics

Event-driven Architecture

Node.js Modules

CommonJS

Asynchronous Programming

Closures

Promises

Callback Functions

Data Types in JavaScript

Variables and Data Structures

Operators

Control Flow

Functions

Arrays

Objects

Classes

Arrow Functions

Hoisting

Prototypes

Scope

Error Handling in JavaScript

Exception Handling

Performance Optimization

Memory Management

Code Profiling

Code Optimization

Testing and Debugging

Async/Await

ES6 Features

IIFE

Callbacks

Closure

Destructuring

Promises

Template Literals

Spread Operator

What roles can I use the ExpressJS Test for?

Full Stack Developer
Backend Developer
Node.js Developer
Web Developer

How is the ExpressJS 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

Error Handling in Express
RESTful API Development
Secure Coding Practices
Performance Optimization in Express
Working with WebSockets in Express
Unit Testing in Express
Deployment and Continuous Integration
Scaling and Load Balancing
Containerization and Orchestration
Microservices Architecture

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Have questions about the ExpressJS Hiring Test?

What is ExpressJS Test?

The ExpressJS Test evaluates a candidate's proficiency in developing applications using the ExpressJS framework and associated technologies. It is designed for recruiters and hiring managers to assess the skills of potential hires for developer roles involving ExpressJS.

Can I combine the ExpressJS Test with NodeJS questions?

Yes, recruiters can request a custom test that includes both ExpressJS and NodeJS questions. For more details on how we assess NodeJS skills, you can check our NodeJS Online Test.

What topics are assessed in the ExpressJS Test?

The ExpressJS Test covers topics such as routing, middleware, setting up an Express application, serving static files, using template engines, debugging, and more. It is designed to evaluate both foundational and advanced skills relevant to ExpressJS development.

How to use the ExpressJS Test in my hiring process?

Use the ExpressJS Test as a pre-screening tool at the early stages of recruitment. Add a link to the test in your job post or invite candidates via email to streamline your candidate selection.

Can I test JavaScript and NodeJS together in a test?

Yes, you can test both JavaScript and NodeJS together in a single test. This approach is recommended for roles that require expertise in both. Check out our JavaScript and NodeJS Test.

What are the main JavaScript-related tests?

We offer various JavaScript-related tests, including:

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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