What term is a tag of three or four letters, preceded by a period, identifying a data file's format or the application used to create the file?

What term is a tag of three or four letters, preceded by a period, identifying a data file's format or the application used to create the file?

• A. Pixel
• B. Adjacent Files
• C. Search Engine
• D. File Extension

Answer: (D)

A file extension is the tag that follows the last period in a file name and is typically three or four letters. This suffix identifies the file’s format or the application used to create it, guiding the system on how to open or handle the file. For example, .txt signals a text file, .jpg a JPEG image, or .docx a Word document. The other terms mentioned don’t describe a naming convention for file types, so they don’t fit this idea.

A file extension is the tag that follows the last period in a file name and is typically three or four letters. This suffix identifies the file’s format or the application used to create it, guiding the system on how to open or handle the file. For example, .txt signals a text file, .jpg a JPEG image, or .docx a Word document. The other terms mentioned don’t describe a naming convention for file types, so they don’t fit this idea.