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This depends upon the operating system. In Windows, the operating system determines if a file is executable by the file extension.
There are three windows executable file extensions that I know of: .exe, .com and .scr
.com is the simplest executable file: it's contents are simply copied into memory and execution begins at the beginning of the file in memory. Because of this simplicity, .com files may be no larger than a little under 64KiB, and they can only be loaded into memory at address 0x0100.
.exe files are more complicated: they are split up into multiple segments. The file contains a header, several tables, a .text section which contains the actual executable instructions, a .data section which contains any static or global data, and more. If the file does not match a specific structure, then the operating system will refuse to execute the file.
Thus, in Windows, in order for a file to be executable, it must have the proper file extension, and it must match a specific format for that file extension.
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How can create a exe file in c?
An 'exe' extension file is created by a compiler that translates source code to machine code, usually in a Windows environment. An executable program can open any file (including other executable files) by using the standard file API calls with a binary open option. Unless you are doing something very specific with executable files it doesn't make much sense to read in an executable file from another executable file or program.
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Explain executable versus non-executable files in DOS?
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EXE is executable file?
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A file that tells a computer how to perform a specific task is called?
Executable
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TXT is executable file?
no. it isn't.
