Which of the following file extensions generally indicates an executable file?

The file extension .exe is associated with executable files, which are files that contain a program that can be run on a computer. When a user double-clicks on an .exe file, the operating system interprets the file as a command to launch a specific application or perform a designated task. This type of file typically contains compiled code that the system can execute directly.

In contrast, the other file extensions serve different purposes: .txt is a plain text file used for storing unformatted text, .jpg is an image file format commonly used for pictures, and .mp4 is a multimedia format used for storing video and audio. These file types cannot be executed as programs, making .exe the distinct format that indicates executable content.