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Hire Node.Js Developer FAQs (9)

How do you handle deployment of a Node.js application to production?

Using CI/CD pipelines, deployment services (AWS, Heroku), environment variables, monitoring tools like PM2, and automated processes.
What is Node.js and why is it a good choice for backend development?

Node.js enables JavaScript for backend, offering non-blocking, event-driven architecture for fast, scalable, I/O-heavy applications.
How can a Node.js developer help optimize the performance of my application?

Through asynchronous programming, caching, efficient queries, load balancing, and profiling, Node.js developers enhance performance and scalability.
How does a Node.js developer ensure the security of an application?

By validating inputs, using HTTPS, JWT authentication, securing headers with Helmet.js, and preventing common attacks like SQL injection.
Can you explain how Node.js handles concurrent requests?

Node.js uses an event loop and non-blocking I/O, allowing it to handle multiple requests without blocking operations.
What are the main challenges when developing with Node.js, and how do you overcome them?

Challenges: callback hell, error handling. Overcome by using async/await, Promises, modular design, and robust logging practices.
How would you approach integrating a third-party API with a Node.js application?

By using HTTP clients like Axios or native http, handling responses, errors, and abstracting API interactions for maintainability.
How does Node.js interact with databases, and what options are available?

Node.js uses libraries like Sequelize, Mongoose, or Knex.js to interact with SQL and NoSQL databases efficiently.
What is your approach to testing a Node.js application?

I use Mocha/Jest for unit tests, Supertest for API testing, and CI pipelines for automated test execution.