What is the difference between dll and exe in net




















EXE An Exe is executable file and is not a supportive file rather itself an application. An Exe will contain an entry point main function so runs individually. There are a couple of types of libraries, dynamic and static - read about the difference. DLL stands for dynamic link library which tells us that it's a part of the program but not the whole thing.

It's made of reusable software components library which you could use for more than a single program. In most cases you'd want to re-use the code you've written because it's a complex but a common component - You want many applications to use it but you don't want to give them the source code You can't copy-paste the code for the button in every program, so you decide you want to create a DL-Library DLL.

This "button" library is required by EXEcutables to run, and without it they will not run because they don't know how to create the button, only how to talk to it. DLLs are not directly executable. They are separate files containing functions that can be called by programs and other DLLs to perform computations and functions. A DLL can have only one instance. EXE : Executable 1. An EXE is a program that can be executed Ex. Windows Program 2. An Application can have multiple instances of itself running on the system simultaneously.

Difference between exe and dll A DLL would share the same process and memory space of the calling application while an EXE creates its separate process and memory space.

There is a maximum probability that it might contain malware. Basically, there are two types of executable files. The compilation of both the files has been done from the source codes. The codes are converted into binary code and the execution is done by the CPU. Dynamic Library Link or dll is a file type that consists of certain instructions that other programs make use of when in need. It is a library of various information and function that are accessible by a Windows program.

DLL files are not capable of running directly. Instead, they need to be called upon by some other code that is running on the computer. This means that the data is used in programs when the program calls for it.

The data is not available in the memory permanently. A DLL file consists of a. So, anyone with the knowledge of coding may easily write their own DLL code. A large number of DLL files are available on Windows by default. But they can also be installed by third-party programs.

Ex :Windows program. As long as the coder knows the names and parameters of the functions and procedures in the DLL file. EXE: Only for specific purpose. Both files are PE files. Both contain the exact same layout. A DLL is a library and therefore can not be executed. If you try to run it you'll get an error about a missing entry point. It has an entry point. A flag inside the PE header indicates which file type it is irrelevant of file extension.

One minor difference is that in most cases DLLs have an export section where symbols are exported. EXEs should never have an export section since they aren't libraries but nothing prevents that from happening. The Win32 loader doesn't care either way. Other than that they are identical. So, in summary, EXEs are executable programs while DLLs are libraries loaded into a process and contain some sort of useful functionality like security, database access or something. What sakthivignesh says can be true in that one.

In this case, the "slave". However, if you just pick a random. There were similar functions in Win They were originally a way of sharing binary code particularly system APIs between multiple running programs in order to minimise memory use.

An EXE is visible to the system as a regular Win32 executable. Its entry point refers to a small loader which initializes the. NET runtime stores information about the contained assembly in its own header. An exe is an executible program whereas A DLL is a file that can be loaded and executed by programs dynamically.

If an assembly is compiled as a class library and provides types for other assemblies to use, then it has the ifle extension. Likewise, if an assembly is compiled as an application, then it has the file extension. NET Core 3. EXE is a program that is executed directly. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Collectives on Stack Overflow. Learn more. Difference between. Ask Question. Asked 12 years, 3 months ago. Active 1 year, 1 month ago. Viewed k times. I want to know the exact difference between the dll and exe file. Improve this question.

Umesh Aawte Umesh Aawte 4, 6 6 gold badges 40 40 silver badges 51 51 bronze badges. You should add some context here: Are you a beginner Are you looking a some kind of deep technical specification of the PE stuff Or something else — khebbie.

It is true I am a beginner. It is a interview-question as tagged. More importantly, this is a duplicate including one deleted by sakthivignesh Add a comment. Active Oldest Votes. Well, the major differences are: EXE An exe always runs in its own address space i. The purpose of an EXE is to launch a separate application of its own. DLL A dll always needs a host exe to run. DLL is Microsoft's implementation of a shared library.



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