1 Essential Express.js Interview Questions *
Toptal sourced essential questions that the best Express.js developers and engineers can answer. Driven from our community, we encourage experts to submit questions and offer feedback.
Hire a Top Express.js Developer Now
is an exclusive network of the top freelance software developers, designers, finance experts, product managers, and project managers in the world. Top companies hire Toptal freelancers for their most important projects.Interview Questions
What function arguments are available to Express.js route handlers?
The arguments available to an Express.js route handler function are:
-
req- the request object -
res- the response object -
next(optional) - a function to pass control to one of the subsequent route handlers
The third argument may be omitted, but is useful in cases where you have a chain of handlers and you would like to pass control to one of the subsequent route handlers, and skip the current one.
There is more to interviewing than tricky technical questions, so these are intended merely as a guide. Not every “A” candidate worth hiring will be able to answer them all, nor does answering them all guarantee an “A” candidate. At the end of the day, hiring remains an art, a science — and a lot of work.
Why Toptal
Submit an interview question
Submitted questions and answers are subject to review and editing, and may or may not be selected for posting, at the sole discretion of Toptal, LLC.
Looking for Express.js Developers?
Looking for Express.js Developers? Check out Toptal’s Express.js developers.
Luuk van Egeraat
Freelance Express.js Developer
Lucas is a software engineer. At the age of 10, he began wondering how to communicate with computers. This passion, which started two decades ago, has developed into a strong ability to translate stories and envisioned product sketches into computer-readable languages. Lucas primarily works with TypeScript and utilizes frameworks like React to build UIs. For APIs, he leverages either Next.js or Vanilla Node.js.
Show More
Alejandro Hernandez
Freelance Express.js Developer
Alejandro got his bachelor's degree in software engineering in 2005 and has since been working for software companies of all sizes from all around the globe as a freelancer. Currently, he enjoys working as a full-stack architect in JavaScript projects, where his experience and his deep understanding of architecture and theory are most impactful.
Show More
Tomislav Capan
Freelance Express.js Developer
Tomislav is a software engineer, technical consultant, and solution architect who began as a technical partner for an online media business, growing it from zero to over 100,000 monthly readers. After years in software engineering, he now provides technical leadership through consulting and architecting dynamic, reliable, and scalable cloud solutions to support business growth and optimize complex architectures gone wrong. As an infrastructure lead, Tomislav makes the cloud a friendly place.
Show MoreToptal Connects the Top 3% of Freelance Talent All Over The World.
Join the Toptal community.