Which of the following is NOT a document file extension?

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Multiple Choice

Which of the following is NOT a document file extension?

The file extension .mp3 is associated with audio files, specifically for music or sound recordings. It stands for MPEG Audio Layer III and is designed for compressing audio data while maintaining sound quality. In contrast, the other options—.docx, .pdf, and .txt—are all document file extensions. The .docx extension is used for Microsoft Word documents, which allows for text, images, and formatting. The .pdf extension is for Portable Document Format files, commonly used to present documents consistently across different devices and operating systems. The .txt file extension indicates a plain text file, which contains unformatted text. Therefore, .mp3 is the only option that does not represent a document file extension.

The file extension .mp3 is associated with audio files, specifically for music or sound recordings. It stands for MPEG Audio Layer III and is designed for compressing audio data while maintaining sound quality. In contrast, the other options—.docx, .pdf, and .txt—are all document file extensions.

The .docx extension is used for Microsoft Word documents, which allows for text, images, and formatting. The .pdf extension is for Portable Document Format files, commonly used to present documents consistently across different devices and operating systems. The .txt file extension indicates a plain text file, which contains unformatted text. Therefore, .mp3 is the only option that does not represent a document file extension.

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