Node.js Interview Questions for Developers

The premier back-end JavaScript framework, Node continues to rise in popularity due to its low learning curve, extensive library support, and excellent performance due to its non-blocking input/output design.

According to the CoderPad 2023 Developer survey, Node is THE most in-demand back-end framework among technical recruiters and hiring managers.

To evaluate the Node expertise of developers during coding interviews, we have provided hands-on coding challenges and interview questions below.

Additionally, we have outlined a set of suggested practices to ensure that your interview questions accurately measure the candidates’ Node skillset.

Node.js example question

Create a NodeJS CRUD API

The goal of this exercise is to retrieve data from an external source, store it in an appropriate database structure, and create a CRUD RESTful API to interface with the database

Goals

1. Read the data from this graphql endpoint: https://swapi-graphql.netlify.app/.netlify/functions/index with the following query:

query Query {allPlanets{planets{name population terrains climates}}}

(View the shape of the data here.)

2. Store the data from the graphql endpoint into the database and create appropriate models

3. Write RESTful Create, Read, Update, and Delete endpoints to interact with the database

Interview best practices for Node roles

For successful Node.js interviews, it’s important to consider various factors such as the candidate’s experience level and the engineering role they are applying for. To ensure that your Node.js interview questions yield the best results, we recommend following these best practices when working with candidates:

• Devise technical queries that correspond with real-world business scenarios within your organization. This approach not only makes the interview more captivating for the applicant but also allows you to more effectively gauge their fit for your team.
• Encourage the candidate to pose questions throughout the interview and cultivate a cooperative atmosphere.
• Ensure that your candidates possess a comprehensive understanding of multi-threading and asynchronous request concepts, such as promises.

Additionally, adhering to standard interview etiquette when conducting Node.js interviews is essential. This includes adjusting the question complexity to the candidate’s level of development skills, providing timely feedback to candidates about their application status, and allowing candidates to ask questions about the assessment or working with you and your team.