DOT NET Interview Questions Based on Real-World Projects

Microsoft developed .NET to facilitate various software activities, including developing applications across multiple types of devices. It is a software development framework that supports different programming languages, including C#, F# and VB.NET.

The various functionalities available in .NET, such as automatic memory management and generic types, help make the development process easier and provide an opportunity to build high-quality web and client applications.

If you want to become a software developer, an Online BCA or Online MCA in Software Engineering is the best way to gain skills and real world experience for a succesful career, you will need to excel in the interview. This interview is a crucial step in your job selection process. This interview will cover questions that will test your ability to handle real-life projects.

In this blog, we will discuss the most critical DOT NET interview questions that may be asked of freshers to experienced candidates in a .net interview.

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Basic DOT NET Interview Questions for Freshers

Here are some essential questions that interviewers may ask a new software developer.

1. What is CLR (Common Language Runtime)?

Importance: They ask this question to assess your deep knowledge of .NET.

CLR is the execution environment provided by the .NET framework that helps to manage the execution of applications made with .NET. CLR uses its JIT compiler to convert the immediate language into machine code as per the system it is running on. The JIT compiler works during runtime making the .NET platform portable, performance oriented and independent.

2. What is the Use of the System.IO namespace in .NET?

Importance: They ask this question to evaluate your understanding of the System.IO.

It is an integral part of the .NET framework as it provides classes and methods for handling I/O operations (input/output operations). These operations involve data streams, communication, and reading from and writing to files, utilising devices such as network connections and hard drives.

There are various classes in System.IO that allow developers to fall in line with the file and handle data streams efficiently. Some of these include files, file streams, directories, and so on.

DOT NET Interview Questions for Experienced Candidates

Here are some essential questions that interviewers may ask someone who has past experience with DOT NET.

1. What is the relation between the new .NET 5.0 platform and .NET Core, .NET framework and Xamarin?

Importance: Interviewers ask this question to check if you stay up-to-date with recent trends or not.

The .NET 5.0 acts as a single platform that allows building applications across other platforms such as Windows, Linux and macOS. The .NET 5.0 helps to utilise the best features of .NET Framework, Xamarin and .NET Core.

2. Explain the concept and use of code contracts in .NET programming.

Importance: They ask this question to check your understanding of code contracts in .NET programming.

Code contracts are a set of statements that determine the preconditions, postconditions and invariants for methods and classes. They offer software developers to frame the constraints and expectations of code elements.

Code contracts enable developers to catch potential bugs and help them improve code reliability, validate I/O, and more.

3. What are the significant improvements and feature changes in ASP.NET Core 5.0 and its later versions?

Importance: The interviewers ask this question to check your knowledge of the latest updates in .NET.

Some of the key features in ASP.NET Core 5.0 include enhanced gRPC support and cloud performance, a low API approach, streamlined authentication and authorisation. It also provides enhanced support for HTTP/2 and WebSockets.

These updates enable the software developers to create high-quality web applications.

4. How does TPL or Task Parallel Library enhance parallel programming in .NET?

Importance: Interviewers ask this question to deeply understand your knowledge of programming in DOT NET.

The TPL in .NET provides the task type, which ensures a synchronous operation, and the parallel classes that offer high-level constructs for parallel execution. The task parallel library streamlines parallel programming by abstracting low-level threading details.

TPL simplifies the writing of efficient and scalable parallel code by automating the scheduling of tasks, balancing loads and maintaining synchronisation.

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DOT NET Core Interview Questions

Here is a list of core DOT NET interview questions that will deeply assess your knowledge of .NET.

1. What is the use of the Roslyn compiler platform in the .NET framework?

Importance: They ask this question to understand your core understanding of .NET.

The Roslyn compiler platform, commonly known as .NET compiler platform, is a robust set of open source tools and APIs to work with C# and VB.NET. It enables developers to make static code analysis and create powerful code refactoring and generation tools.

Several Microsoft products use this to provide features such as code fixes, IntelliSense and refactoring.

2. What is the need for a System.Device.Gpio namespace in .NET IOT development?

Importance: They ask this question to assess your knowledge of various items of .NET.

It provides classes and APIs to interact with GPIO or General Purpose Input/Output pins on devices, especially in IOT or Internet of Things. This enables software developers to read from and write to GPIO pins, enhance the hardware and control external devices in their .NET applications.

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Final Words

.NET is an open-source platform developed to create desktop, web and mobile apps. With the steep growth of the technological world, we can imagine the huge scope of development in the future to support these technological instruments with the help of DOT NET. This blog provides you with an idea of the probable types of DOT NET interview questions.

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