DotNet/FAQ

Q1)What is an EXE and a DLL?

EXE and DLLs are assembly executable modules.

EXE is an executable file that runs the application for which it is designed. An EXE is produced when we build an application. Therefore the assemblies are loaded directly when we run an EXE. However, an EXE cannot be shared with the other applications.

Dynamic Link Library (DLL) is a library that consists of code that needs to be hidden. The code is encapsulated inside this library. An application can consist of many DLLs which can be shared with the other programs and applications.

Q2)What is JIT?

JIT stands for Just In Time. It is a compiler that converts the intermediate code into the native language during the execution

Q3)Explain the differences between value type and reference type.

The main differences between value type and reference type are given below:

A Value Type holds the actual data directly within the memory location and a reference type contains a pointer which consists of the address of another memory location that holds the actual data.

Value type stores its contents on the stack memory and reference type stores its contents on the heap memory.

Assigning a value type variable to another variable will copy the value directly and assigning a reference variable to another doesn’t copy the value, instead, it creates a second copy of the reference.

Predefined data types, structures, enums are examples of value types. Classes, Objects, Arrays, Indexers, Interfaces, etc are examples of reference types

Q4)Explain Microsoft Intermediate Language

MSIL is the Microsoft Intermediate Language, which provides instructions for calling methods, memory handling, storing and initializing values, exception handling, and so on.

The instructions provided by MSIL are platform-independent and are generated by the language-specific compiler from the source code. JIT compiler compiles the MSIL into machine code based on the requirement.

Q5)Is ASP.NET different from ASP? If yes, explain how?

Yes, ASP.NET and ASP(Active Server Pages) both are different. Let’s check How they are different from each other.

ASP.NET uses .NET languages such as C# and VB.NET, which are compiled to Microsoft Intermediate Language (MSIL). ASP uses VBScript. ASP code is interpreted during the execution.

ASP.NET which is developed by Microsoft is used to create dynamic web applications while ASP is Microsoft’s server-side technology used to create web pages.

ASP.NET is fully object-oriented but ASP is partially object-oriented.

ASP.NET has full XML Support for easy data exchange whereas ASP has no built-in support for XML.

ASP.NET uses the ADO.NET technology to connect and work with databases. ASP uses ADO technology.

Q6)Explain role-based security in .NET

Role-based security is used to implement security measures in .NET, based on the roles assigned to the users in the organization. In the organization, authorization of users is done based on their roles.

For example, windows have role-based access like administrators, users, and guests