National Occupational Competency Testing Institute (NOCTI) Business Practice Exam

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What type of file does a .jpg extension indicate?

Shows an audio file
Shows a text document
Shows an image
Shows a spreadsheet

The correct answer is: Shows an image

A file with a .jpg extension signifies that it is an image file, specifically a JPEG (Joint Photographic Experts Group) format. This format is widely used for digital images, particularly photographs, due to its ability to compress file sizes while maintaining a reasonable level of quality. JPEG compression is effective at reducing the amount of data needed to store and transmit images, which makes it particularly useful for web use and photo-sharing. Other file types mentioned, such as audio files, text documents, and spreadsheets, have their own specific formats and extensions like .mp3 for audio, .txt for text documents, and .xls or .xlsx for spreadsheets. Each of these formats is designed for different types of content and uses. Therefore, identifying the .jpg extension directly indicates that the file is intended to display visual image data.