Top 20 Middleware Interview Questions and Answers

Updated 17 Jun 2025

3d ago

Q. What is middleware? Give some examples.

Ans.

Middleware is software that acts as a bridge between different applications or systems.

  • Middleware helps in communication between different applications or systems

  • It can be used for authentication, logging, caching, and load balancing

  • Examples include ...read more

Asked in NeoSOFT

3d ago

Q. What is middleware and how is it different from filters?

Ans.

Middleware is software that connects different applications or services, while filters process requests/responses in a web framework.

  • Middleware acts as a bridge between different applications, enabling communication and data management.

  • Examples of mi...read more

Asked in NTT Data

5d ago

Q. How do you implement custom middleware in .net core?

Ans.

Custom middleware in .NET Core can be implemented by creating a class that implements the IMiddleware interface and adding it to the application pipeline.

  • Create a class that implements the IMiddleware interface

  • Implement the InvokeAsync method in the ...read more

Asked in Akra Tech

3d ago

Q. Have you used any custom middlewares?

Ans.

Yes, I have used custom middlewares in my projects to handle authentication, logging, error handling, etc.

  • Used custom middleware for authentication to verify user credentials before accessing protected routes

  • Implemented logging middleware to log requ...read more

Are these interview questions helpful?
3d ago

Q. What is the difference between IIB and ACE?

Ans.

IIB is the previous version of IBM Integration Bus, while ACE is the newer version with added features and capabilities.

  • IIB stands for IBM Integration Bus, while ACE stands for App Connect Enterprise.

  • ACE includes all the features of IIB along with ad...read more

5d ago

Q. What is the concept of Middleware in Web development?

Ans.

Middleware in web development acts as a bridge between different components of a software application, allowing them to communicate and interact with each other.

  • Middleware is software that connects different software applications or components.

  • It hel...read more

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Asked in HyScaler

3d ago

Q. What is Laravel Middleware?

Ans.

Laravel Middleware is a filter that is executed before or after an HTTP request enters the application.

  • Middleware can modify the request before it reaches the route handler.

  • It can also modify the response before it is sent back to the client.

  • Middlewa...read more

Q. What is Django middleware?

Ans.

Django middleware is a component that sits between the web server and the view, allowing for processing of requests and responses.

  • Middleware is a way to modify or process requests and responses globally in a Django application.

  • It can be used for auth...read more

Asked in Xcelore

5d ago

Q. What is CORS middleware?

Ans.

CORS middleware is used to enable Cross-Origin Resource Sharing in web applications.

  • CORS middleware allows servers to specify who can access their resources

  • It adds necessary headers to HTTP responses to allow cross-origin requests

  • Common CORS middlewa...read more

Asked in Tracxn

2d ago

Q. Write Multer middleware code.

Ans.

Multer is a middleware for handling multipart/form-data, used for file uploads in Node.js.

  • Install multer package using npm: npm install multer

  • Require multer in your Node.js file: const multer = require('multer')

  • Set up multer middleware with desired o...read more

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Asked in ConvergeSol

6d ago

Q. Explain Middleware in Dotnet core and how it works.

Ans.

Middleware in Dotnet Core is a component that sits between the client and the server to handle requests and responses.

  • Middleware is a pipeline of components that can process requests and responses in Dotnet Core applications.

  • Middleware can be used fo...read more

Q. middle ware in .net

Ans.

Middle ware in .NET refers to software that acts as a bridge between an operating system or database and applications, providing services such as communication, security, and data management.

  • Middleware in .NET can be used to handle communication betw...read more

4d ago

Q. middleware and how it works

Ans.

Middleware is software that connects different applications or systems together.

  • Middleware acts as a bridge between different applications or systems

  • It provides a common platform for communication and data exchange

  • Examples of middleware include messa...read more

1d ago

Q. Redux, middleware and its use

Ans.

Redux is a state management library for React applications. Middleware is a function that intercepts actions before they reach the reducer.

  • Redux is used to manage the state of a React application in a predictable way

  • Middleware in Redux allows you to ...read more

6d ago

Q. What is middleware and what are its types?

Ans.

Middleware is software that acts as a bridge between an application and the server, handling requests and responses.

  • Middleware can modify incoming requests before they reach the application.

  • It can also modify outgoing responses before they are sent b...read more

5d ago

Q. What are Middleware and filters?

Ans.

Middleware and filters are components in ASP.NET Core that allow you to handle requests and responses in the pipeline.

  • Middleware are components that are added to the request pipeline to handle requests and responses.

  • Filters are used to implement cros...read more

Asked in TCS

1d ago

Q. What is middleware, and can you provide examples of how it is processed in .NET Core?

Ans.

Middleware in .NET Core is software that acts as a bridge between an application's request and response.

  • Middleware in .NET Core is a pipeline of components that can process HTTP requests and responses.

  • Examples of middleware in .NET Core include authe...read more

Asked in Ingram Micro

2d ago

Q. Usage of Middleware along with custom middleware

Ans.

Middleware is used to handle requests and responses in web applications. Custom middleware can be created to add specific functionality.

  • Middleware is software that acts as a bridge between an operating system or database and applications, allowing th...read more

Asked in PrepBytes

3d ago

Q. Explain your implementation of CORS and middleware.

Ans.

CORS is implemented using middleware to allow cross-origin requests.

  • CORS (Cross-Origin Resource Sharing) is a security feature that allows resources to be shared across different domains.

  • Middleware is a software layer that sits between the applicatio...read more

5d ago

Q. What is the purpose of Middleware?

Ans.

Middleware acts as a bridge between different systems, allowing them to communicate and exchange data.

  • Middleware facilitates communication between different software applications or components.

  • It helps in integrating various systems and technologies,...read more

Q. What middleware have you used?

Ans.

Yes, commonly used middleware in Node.js development include Express, Body-parser, Morgan, and Helmet.

  • Express is a popular web application framework for Node.js

  • Body-parser is used for parsing incoming request bodies in Express applications

  • Morgan is a...read more

Asked in TCS

1d ago

Q. How does Middleware work?

Ans.

Middleware is software that acts as a bridge between different applications or systems, allowing them to communicate and share data.

  • Middleware handles communication between different software components

  • It can provide services such as message queuing,...read more

1d ago

Q. What is middleware and what are its uses?

Ans.

Middleware is software that acts as a bridge between different applications or components, facilitating communication and data exchange.

  • Middleware helps in connecting different software components or applications together.

  • It can handle tasks such as ...read more

Asked in Zethic and 2 others

3d ago

Q. What is the use of middleware?

Ans.

Middleware acts as a bridge between different software applications, enabling communication and data management.

  • Facilitates communication between client and server applications, e.g., REST APIs.

  • Handles data management and integration, such as databas...read more

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