Final answer:
To set the file name of an assembly language source code file, save the file with the appropriate extension, such as ".asm" or ".s".
Step-by-step explanation:
In assembly language, the file name of a source code file is set based on the specific assembler being used. However, in general, the file name should have the extension ".asm" or ".s" to indicate that it is an assembly language file. For example, if you are using an assembler like NASM, you might save your file as "my_program.asm".
It's important to note that the assembly language file name does not affect how the code is compiled or executed. The file extension is primarily used to indicate the type of file to the assembler and the programmer.