What is .NET Core?
.NET Core is an open-source system that is free to use. It is a framework of managed computer software framework created for all kinds of operating systems such as Linux, Windows, and Mac. It was made as a cross-platform with the aim of this Framework succeeding the earlier existing Framework named .NET Framework.
Apart from just serving as an open-source system, it is also free to use, and the biggest advantage of using this computer software is that a person is not in the boundaries of what kind of operating system they use as it can be used in all the operating systems like Linux, Mac, and windows.
Top 100+ .NET Core Interview Questions For Freshers and Experienced Candidates
Many questions are asked in the interviews of .NET Core, and the candidates must answer all those questions correctly to get the job they are looking forward to joining. We are going to discuss the most asked 100 .NET Core Interview Questions and answers.
The questions asked in the interviews will be written in this pattern: –
Qx: .NET Core interview questions
The answer to the question.
The .NET Core interview questions are as follows: –
Q1: What is .NET Core?
A free and open-source system, a framework of managed computer software created for all operating systems, is called .NET Core.
This is one the top question asking in the .Net core interview questions for fresher’s and experienced candidates.
Q2: String and string in C# are different show that.
The String and string commands in C# on a compilation by the system give the same result; hence they are both the same.
Q3: What is the .NET Framework?
A platform developed by Microsoft to serve the need of the platform for developing software that can be run on windows is called .NET Framework.
Q4: What is .NET Standard?
A specification based on the Application Programming Interface about implementing which base class library should be done is called the .NET Standard.
Q5: What do you understand by Value types and Reference types in .NET? Provide some comparison.
Related To: C#
Value types are variable and have a memory of their own. Still, reference types have no memory of their own they point towards a particular location where the information is stored.
Q6: What are Boxing and Unboxing?
Related To: C#
The process of conversion of a variable into a reference type is known as boxing, and vice versa is called unboxing.
Q7: What are some characteristics of .NET Core?
The first characteristic of .NET Core is that it is a system of open source and the other one is that it is a framework of managed computer software and it can run on all the operating systems.
Q8: What is the difference between .NET Core and Mono?
Mono is platform-independent, and .NET Core is platform dependent.
Q9: What’s the difference between SDK and Runtime in .NET Core?
SDK is the kit required to develop software, while the other includes things required to run a developed software.
Q10: What is the difference between decimal, float and double in .NET?
The sizes of decimal, float, and double are respectively 128 bit, 32 bit, and 64 bits.
Q11: What is an unmanaged resource in .NET?
Objects created which cannot be controlled by .NET are called unmanaged resources.
Q12: What is CLR?
It stands for Common Language Runtime; it is the component that .NET Core uses to execute the programs written in it.
Q13: What is CTS?
The standard that specifies how the values of specific types are stored in a computer system is called CTS or Common Type System.
Q14: What is a .NET application domain?
The boundary that is created for isolating a .NET Core application logically is called the .NET application domain.
Q15: Name some CLR services.
Some CLR services include a loading of a program, the process of the program being executed, management of memory, verifying the safety of a type used, and many more.
Q16: What is .NET Standard, and why do we need to consider it?
The definition of the .NET Standard is in question number 4, and the reason we need to consider it is that each tool has a consistent set of APIs.
Q17: What is MSIL?
The output of the compiler of .NET Core is called MSIL that is Microsoft Intermediate Language.
Q18: What’s the difference between .NET Core, .NET Framework, and Xamarin?
.NET Framework can only work in windows, .NET Core can work in all operating systems, and Xamarin is a particular component that runs on Mono, a version of. NET.
Q19: What is Kestrel?
A web server that is the default for ASP.NET applications is called Kestrel.
Q20: What is the difference between .NET Core and .NET Framework?
.NET Framework can only work in windows, .NET Core can work in all operating systems.
Q21: Explain what is included in .NET Core?
The .NET Core is a platform that provides a feature to create any kind of software for any operating system.
Q22: Explain two types of deployment for .NET Core applications.
The two different deployments are Self Contained deployment and Framework Dependent Deployment.
Q23: Is there a way to catch multiple exceptions at once and without code duplication? Related To: C#
Yes, there is a way, and the way is of using a vertical bar in the output block.
Q24: Discuss the difference between Task and Thread in .NET Related to C#
Task represents a set of operations that are asynchronous, but a thread does not.
Q25: What is CoreCLR?
The runtime for .NET Core is known as CoreCLR.
Q26: Why the use of the IDisposable interface?
Related To: C#
To exploit a statement that is being used, we use the I Disposable interface.
Q27: What are the benefits of Explicit Compilation (AOT)?
The help in the conversion of a language of upper level into a code of object prior to execution of the program.
Q28: When should we use .NET Core and .NET Standard Class Library project types?
When you need to increase the surface area of the .NET API in order to make it easier for the library, we need to use these.
Q29: What is BCL?
BCL is the Base Class Library of .NET Core.
Q30: What is Explicit Compilation?
The function for the conversion of a language of upper level into a code of object prior to execution of the program.
Q31: What is the difference between Class Library (.NET Standard) and Class Library (.NET Core)?
The first is a specification done by API, and the second is a framework for developing software.
Q32: What is FCL?
FCL is the Framework Class Library for .NET Core.
Q33: Explain the difference between Managed and Unmanaged code in .NET?
The managed code is the code that is in the control of the .NET Core, but the unmanaged cannot be controlled by it.
Q34: What is the JIT compiler?
JIT compiler is a component of run time environment and is also called Just in Time compiler.
Q35: What does Common Language Specification (CLS) mean?
The document which helps in converting a program into a common intermediate language is called CLS.
Learn more: Top 100+ .NET Interview Questions and Answers
Q36: What is the difference between .NET Standard and PCL (Portable Class Libraries)?
PCL is for APIs, but the other one is for more platforms.
Q37: What about MVC in .NET Core? Related To: ASP.NET MVC
This is an open-source framework used for ASP.NET Core.
Q38: Does .NET support multiple inheritances?
No .NET Core does not support multiple inheritances in order to avoid complexity in the language.
Q39: What is the difference between .NET Framework/Core and .NET Standard Class Library project types?
The first one is a specification done by API and the second one is a framework for developing software.
Q40: What’s the difference between Ryu JIT and Roslyn?
Roslyn is the main compiler of a program, but Ryuji is the just-in-time compiler.
Q41: Explain how do Asynchronous tasks Async/Await work in .NET? Related To: C#
This basically suspends the calling method and then waits until the control is back to the unit that is supposed to control.
Q42: Assembly, App Doman, Thread, and a process are different; show that.
AppDomain is a concept of .NET Core, whereas the assembly process is more of a concept of operating system-related things.
Q43: How to choose the target version of the .NET Standard library?
You will see an option project on the solution explore; you have to right-click on that, and then you have to open an option named the application tab.
Q44: Why does .NET use a JIT compiler instead of just compiling the code once on the target machine?
In order to keep checking the program instantly, again and again, the JIT compiler is used by .NET Core.
Q45: Explain the Implicit Compilation process
The process of the conversion of a language of upper level into a code of object prior to execution of the program.
Q46: What are the benefits of using JIT?
The requirement for more space can be avoided, and also the rate of rework is low if someone uses the JIT compiler.
Q47: What is the difference between CIL and MSIL (IL)?
CIL is the intermediate language for international use, whereas MSIL is for inner Microsoft issues.
Q48: Why does the .NET Standard library exist?
.NET Standard library exists in order to access APIs more efficiently.
Q49: Explain when to use Finalize vs. Dispose of?
Related To: C#
The use of the method finalize( ) is to free unmanaged resources before the destruction of the object. The use of method dispose( ) is whenever there is a close( ) method.
Q50: What is the difference between the async/await model and Node.js async in .NET?
.NET uses pre-emptive multitasking for user code, and Nodejs does not.
Q51: How many types of JIT Compilations do you know?
There are 3 JIT compilers named Eco no JIT compiler, Pre JIT Compiler, and Normal JIT Compiler.
Q52: Could you name the difference between .Net Core, Portable, Standard, Compact, UWP, and PCL?
Each one of the things mentioned targets different components of the program.
You can select these questions from the above list to prepare the top 10 .net core interview questions.
A little description about .NET core exam: –
The project of making this .NET Core software was given to the company, which everyone knows. The name of the company that was given the duty of creating this managed computer software is Microsoft. Primarily following the footsteps of the .NET foundation, the employees of Microsoft developed the software, and this project was licensed under the Massachusetts Institute of Technology, United States of America. This is the reason it is also considered Microsoft.NET Core.
As of writing this article, eight different versions of .NET Core were already being released in the market. The latest released version of .NET Core was named .NET 5, which was released officially on the 10th of November in 2020. The .NET Foundation has already announced the release of the three future versions of the .NET Core software 6, 7, and 8 in 2021, 2022, and 2023, all of them in November.
.NET Core is a cross-platform that has the function of running applications on different operating systems. Programming languages and many other kinds of applications are being run with the help of this managed Framework of computer software. This is why this software is so much success in the world of technology and the real world.
So in this article, we discussed about the top 100+ .net core interview questions and answers for fresher’s and experienced candidates to crack the job easily.
The ASP.NET Interview Questions That Are Being Asked: –
Q53: What is View Data?
Viewdata is a kind of Videotex implementation that is a type of information retrieval service.
Q54: Can ASP.NET Core work with the .NET framework?
Yes, and in order to run ASP.NET Core Apps on .NET Framework, it needs to only reference.
Q55: Explain the start-up process in ASP.NET Core?
A Start-up class named start-up by convention is used for ASP.NET Core apps.
Q56: Talk about Logging in ASP.NET Core?
The candidate has to talk about all purposes of ASP.NET.
Q57: What is ASP.NET Core?
ASP.NET, a popular web-development framework that is used for building web apps on the .NET platform. It is an open-source web framework and also the successor to ASP.NET. This was developed by Microsoft
Q58: Write the differences between ASP.NET and ASP.NET MVC?
ASP.NET is a platform that provides a layer that sits on top of the web server IIS, which simplifies the creation of web applications and web services, whereas ASP.NET MVC is a framework for building web applications.
Q59: What is View State?
The method that the ASP.NET page framework uses to preserve page and control values between round trips is called View state.
Q60: What is a post back?
A post back in web development is an HTTP POST to the same page that the form is on.
Q61: What exactly is an application pool? What is its purpose?
A group of URLs that are served by a worker process or set of worker processes is known as an application pool. Its purpose is to separate the sets of IIS worker processes that share the same configuration and application boundaries.
Q62: Explain Middleware in ASP.NET Core?
A software that is set up into an app pipeline in order to handle requests and responses. Its components are:
- To choose whether to pass the request to the next component in the pipeline.
- If it can perform work before or after the next component in the pipeline.
Q63: What is new in ASP.NET Core 2 compared to ASP.NET Core 1?
The ASP.NET Core 2 is faster than its predecessor, ASP.NET Core 1.
Q64: Explain the usage of Dependency Injection in ASP.NET Core
Dependency injection or DI, a design pattern in which a class or object has its dependent classes passed to it by another class or object rather than creating them directly. It promotes testability and maintenance as well as facilitates loose coupling.
Q65: What is the difference between Server. Transfer and Response. Redirect?
The difference between Response. Redirect and Server. The transfer method is that Response. Redirects a request to a completely new URL and also specifies the new URL whereas the Server. Transfer method for the current request terminates execution of the current page.
Q66: What are the subtypes of Action Result?
The sub types of Action Result are –
- View Result
- Empty Result
- Redirect Result
Q67: What are the different types of caching?
In ASP.NET, Caching is of three types:
- Page output caching.
- Page fragment caching.
- Data caching.
Q69: List the events in the ASP.NET page life cycle.
The events in the ASP.NET page life cycle is: –
Q70: Explain JSON Binding?
For converting Java objects to or from JSON messages, JSON Binding, a standard binding layer, is used.
Q71: In which event of page cycle is the ViewState available?
Just after the page InitComplete, The Viewstate is loaded in the OnPreLoad event of the page.
Q72: Where is the ViewState stored after the page postback?
In a hidden field on the client-side, the ViewState is stored after the page postback.
Q73: How can we prevent the browser from caching an ASPX page?
The browser can be prevented from caching an ASPX page by using the SetNoStore() method.
Q74: What are the different validators in ASP.NET?
In ASP.NET, the different validators are: –
Q75: What is ViewState? How is it encoded? Is it encrypted? Who uses ViewState?
The method of preserving the Value of the Page and Controls between round trips is known as Viewstate. It is base64-encoded. It can be encrypted, but originally it was not encrypted. Viewstate is client-side state management.
Q76: What exactly is the difference between .NET Core and ASP.NET Core?
The .NET Core supports libraries, whereas the ASP.NET Core supports APIs.
This is one of the top question asked in the .net core interview questions.
Q77: What is the difference between ASP.NET Core Web (.NET Core) vs. ASP.NET Core Web (.NET Framework)?
The difference is that .NET Core does not support the development of the desktop application.
Q78: What is the difference between web config and machine config?
The file of web config is for the local settings that are to be applied for a website which stores in XML format the configuration data whereas settings of Machine. Config files are normally applied to the whole asp.net applications on the Server wherever in the web the settings are made.
Q79: Which type of caching will be used if we want to cache the portion of a page instead of the whole page?
In such circumstances, Page Fragment Caching is used.
Q80: How can we force all the validation controls to run?
By using the Validation() method, all the validation controls can be forced to run.
Q81: What are the different Session state management options available in ASP.NET?
The available options are: –
- State Server Mode
- SQL Server Mode
- Custom Mode
Q82: Is it possible to create a web application with both WebForms and MVC?
Related To: ASP.NET MVC
Yes, it is possible to create a web application by combining both WebForms and MVC.
The types of cookies are: –
- Persist Cookie – one which has not expired time
- Non-Persist Cookie – one which has expired time.
Q84: What is the difference between <system. Web> and <system. Webserver>?
The first one is for offline purposes, while the second one is for online purposes.
Q85: How to choose between ASP.NET 4. x and ASP.NET Core?
You need to choose it according to the service they are providing.
Q86: What is the difference between classic and integrated pipeline mode in IIS7?
The Classic mode is the only mode in IIS6 is the mode where IIS only works with ISAPI extensions and directly filters ISAPI. On the other hand, Integrated mode is a new mode in IIS7 where the IIS pipeline is tightly integrated.
Q87: What is HTTP Module in ASP.Net?
A component that is a part of the ASP.NET request processing pipeline is called HTTP Module in ASP.NET.
Q88: What is Katana?
It is a set of flexible components used for building and hosting an Open Web Interface—NET-based web apps.
Q89: What is an HTTP Handler in ASP.NET? Why and how is it used?
In order to handle specific requests based on extensions, HTTP Handler is used by ASP.NET.
Q90: Name some ASP.NET WebForms disadvantages over MVC?
Some disadvantages of ASP.NET WebForms over MVC are:
- Lack of Reusability
- Parallel Development is minimal.
Q91: What is the equivalent of WebForms in ASP.NET Core?
ASP.NET Core Razor Pages is the equivalent of webforms in ASP.NET Core.
Q92: What is Cross Page Posting?
The process of posting data to another page is known as Cross Cage Posting.
Q93: What exactly is OWIN, and what problems does it solve?
The OWIN decouples a web application from a web server so that one does not have to think about how the application will be deployed.
Q94: Are static class instances unique to a request or a server in ASP.NET?
No, the static classes and static instance fields are shared between all requests to the application and hence have the same lifetime as the application domain.
Some of the worth mentioning ASP.NET interview questions are as follows: –
Many languages, editors, libraries, and many other things are function under the software framework for operating systems named .NET Core. Here we will mention the interviews for .NET Core jobs, and we will say .NET Core interview questions that are asked to the candidates of the job in the next segment of the article.
Q95: What is Layout in MVC?
The layout in MVC is an option for creating the common layout. This lets us define a common template for the site.
Q96: What is ASP.NET MVC?
Developed by Microsoft, ASP.NET MVC is a web application framework that accomplishes the model-view-controller pattern.
Q97: What are Razor Pages?
It is a newer and simplified version of web application programming.
Q98: What is the use of ViewModel in MVC?
The main use of ViewModel in MVC is to pass data to a strongly-typed view from the controller.
Q99: Can you explain Model, Controller, and View in MVC?
MVC is a pattern consisting of three parts: Model: it handles data and logic, Controller: Controls the data flow, and View: displays the information to the user from the model.
Q100: What are Scaffold templates in MVC?
Templates that are used within the ASP.NET MVC application to generate code for basic CRUD operations are called Scaffold templates.
Hopefully, this content has helped you to learn about the different questions that are asked in the interviews of .NET Core to the candidates with the answers. If you have any more .Net Core interview questions, then please share with us in the comment section.