LTIMindtree Mern Full Stack Developer Interview Questions and Answers

Error handling middleware is a function that processes errors in an Express application.

• Error handling middleware is defined with four parameters: err, req, res, and next.

• It is used to catch errors that occur during the execution of route handlers or other middleware functions.

• It is typically defined at the end of the middleware chain with app.use() and has a signature like (err, req, res, next) => {...}.

• Example: app.u...read more