Which file extension is commonly associated with compressed files?

The file extension .zip is commonly associated with compressed files because it indicates a file format that can contain one or more files and folders in a reduced size. The .zip format is widely used because it allows for the efficient storage and transmission of large amounts of data by compressing it, which can help save disk space and reduce loading times. This extension is supported across various operating systems and compression tools, making it a standard choice for file compression.

The other extensions provided are associated with different file types: .exe pertains to executable files, which are programs that can be run on a computer; .docx is associated with Microsoft Word documents, used for text editing and word processing; and .jpg is a format for compressed image files, primarily used for photographs. Each has its specific purpose, which distinguishes it from the .zip format designed specifically for file compression.