File types refer to classifying the content of the file, such as a program, text
file, executable program or data file. In Windows operating systems, the file
type is derived from the filename extension. Typical file types and their
extensions are:
|
File Extension |
File Type |
|
.bas |
basic source program |
|
.cpp |
C++ source program |
|
.dll |
system library |
|
.doc |
Word document |
|
.exe |
executable program |
|
.txt |
text file |
Windows associates applications (programs) with specific file types. For example, the default application that opens to process a file of type .txt is the Notepad editor.