Evolved by way of Microsoft, dotNet or .NET framework is a instrument framework utilized by builders to construct, deploy, and run packages that use .NET applied sciences reminiscent of desktop and internet packages. In step with a survey by way of Stack Overflow, the .NET framework is the preferred framework utilized by skilled builders.
Its reputation lies in the truth that it provides a extremely constant object-oriented programming surroundings for builders to construct packages that may run on more than one platforms. In case you are in search of a leg up on your instrument building occupation, this text at the best .NET interview questions will permit you to to sweep up your wisdom sooner than any interview.
Best .NET Interview Questions and Solutions for 2025
1. What are the other elements of the .NET framework?
The other elements of the .NET framework are:
- Utility Area
- Not unusual Language run-time
- .NET Elegance Library
- .NET Framework
- Not unusual Kind Gadget
- Profiling
2. What do you imply by way of CTS?
CTS stands for Not unusual Kind Gadget. It describes what information varieties are for use in an utility the use of sure regulations reminiscent of which information sort is to be declared or when it must be utilized in this system code. You’ll be able to additionally make your individual categories and purposes by way of following the principles within the CTS. That is very helpful when you need to name an information sort declared in a single programming language to any other programming language.
3. Provide an explanation for the diversities between CLR and CLS.
CLR stands for Not unusual Language Runtime and is without doubt one of the primary elements of the .NET framework. It may be used as a construction block for more than a few packages by way of offering a protected surroundings for executing them. When an utility written in a programming language is compiled, the code is transformed into an intermediate language. The code is then centered to CLR which plays a number of operations on it like safety tests, thread control, reminiscence control, and loading assemblies.
CLS stands for Not unusual Language Specification. It is helping builders use elements which can be inter-language suitable with regulations that come at the side of CLS. It additionally is helping builders to reuse this code in different .NET suitable languages.
4. What do you imply by way of JIT?
JIT is a .NET framework compiler that stands for Simply In Time. It’s used all over execution to transform the intermediate code into the local language.
5. What do you imply by way of Reaction.Redirect and Server.Switch?
Reaction.Redirect is used to redirect the consumer’s browser to any other web page or web page. The consumer’s browser historical past will get up to date to replicate the brand new cope with. It additionally plays a around outing again to the customer’s browser.
Server.Switch is used to switch from one web page to any other with out creating a round-trip again to the customer’s browser. The consumer’s browser historical past does no longer get up to date to replicate the brand new cope with.
6. Provide an explanation for the diversities between a category and an object.
The primary variations between a category and an object are:
Elegance |
Object |
| Definition of an object | Example of a category |
| Describes strategies, houses, and so on. | Accesses the houses from the category |
| Template of an object | A category does no longer change into an object until instantiated |
7. What’s LINQ?
LINQ stands for Language Built-in Question. It was once presented with Visible Studio 2008 and bridges the distance between gadgets and knowledge. It accommodates a suite of options that stretch question features to permit information manipulation within the .NET framework language syntax without reference to the information supply.
8. What’s a rubbish collector?
A rubbish collector is used to loose unused code gadgets within the reminiscence head. The reminiscence head is split into 3 generations:
- Technology 0 – Retail outlets short-lived gadgets.
- Technology 1 – Retail outlets medium-lived gadgets.
- Technology 2 – Retail outlets long-lived gadgets.
9. Outline caching and its more than a few varieties.
Caching method quickly storing information within the reminiscence in order that it may be accessed from the reminiscence as an alternative of the unique location. This will increase the rate and potency of the applying. The several types of caching are-
- Information caching
- Web page caching
- Fragment caching
10. What do you imply by way of MVC?
MVC stands for Fashion View Controller. It’s an structure used to construct .NET packages.
Fashion – Handles object garage and retrieval from databases.
View – Handles the UI of an utility.
Controller – Handles consumer interactions and renders the view this is required for the consumer interplay.
11. Provide an explanation for role-based safety.
Function-based safety is used to put in force security features and authorize get entry to to customers in line with their roles within the group. As an example, Home windows has role-based safety get entry to like admin, consumer, and visitor.
12. What’s cross-page posting?
Each time you click on at the publish button on a web page, that information will likely be saved at the similar web page. On the other hand, if the information will get saved on a special web page, it’s referred to as cross-page posting. It may be completed the use of the POSTBACK URL assets.
13. Listing all of the templates of the Repeater keep watch over.
The other templates of the Repeater keep watch over are:
- AlternatingItemTemplate
- HeaderTemplate
- FooterTemplate
- ItemTemplate
- SeparatorTemplate
14. What’s MIME?
MIME stands for Multipurpose Web Mail Extensions which allows customers to replace recordsdata over the web. The MIME header is inserted onto servers in the beginning of the internet transmission. The shoppers can then use this header to make a choice an acceptable ‘participant’ for the information sort indicated by way of the header.
15. What’s a delegate in .NET?
A delegate in .NET works in a similar fashion to a serve as pointer in programming languages reminiscent of C or C++. It may also be used to create a customized tournament in a category.
16. What’s the utility area?
.NET framework introduces the idea that of utility area or AppDomain which is a light-weight procedure that may serve both as a container or a boundary. The .NET CLR makes use of it as a container for information and code and permits more than one .NET packages to run in one AppDomain.
17. What’s CAS?
CAS stands for Code Get admission to Safety that stops unauthorized get entry to to assets. It allows customers to set permissions for his or her code. The code is then completed by way of the CLR relying upon the permissions.
18. How do you save you a category from being inherited?
You’ll be able to save you a category from being inherited by way of the use of sealed key phrases.
19. What are the several types of assemblies to be had within the .NET framework?
There are two forms of assemblies to be had within the .NET framework:
- Non-public Meeting – It’s put in within the listing of the applying and is available handiest to the applying.
- Shared Meeting – It’s put in within the GAC and will also be shared by way of more than one packages.
20. What are MDI and SDI?
MDI stands for More than one Report Interface. It permits you to open more than one home windows – one mum or dad window and more than one kid home windows. The elements of the kid home windows are shared from the mum or dad window.
SDI stands for Unmarried Report Interface. It permits you to open a separate window for each and every report. Every window has its personal elements and isn’t constrained to the mum or dad window.
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