What is middleware and how do you implement custom middleware?

Question

Accepted Answer

Middleware is software that acts as a bridge between an operating system or database and applications, allowing them to communicate with each other.

Middleware is a layer of software that connects different components of an application, such as the frontend and backend.
It can handle tasks like authentication, logging, error handling, and request processing.
Custom middleware can be implemented by creating a function that takes in parameters like request, response, and next, and then calling next to pass control to the next middleware in the chain.
Examples of custom middleware include logging middleware that logs requests and responses, authentication middleware that verifies user credentials, and error handling middleware that catches and handles errors.

Top Tricon Infotech Dot Net Engineer interview questions & answers