What file extension is used to save an MS PowerPoint 2021 presentation?
.pptx
To determine the correct file extension used to save an MS PowerPoint 2021 presentation, we need to be familiar with the various file formats associated with different Microsoft Office applications:
- .xlsx: This file extension is used for Microsoft Excel spreadsheets.
- .pdf: Stands for Portable Document Format, which is a file format developed by Adobe. It's generally used for documents that are independent of application software.
- .docx: This file extension is used for Microsoft Word documents.
- .pptx: This file extension is used for Microsoft PowerPoint presentations.
Given this information, the correct file extension used to save an MS PowerPoint 2021 presentation is .pptx.
The .pptx format was introduced with Microsoft Office 2007, when Office applications transitioned to the more modern XML-based file formats (.docx, .pptx, .xlsx). These formats are more efficient, safer, and support a greater range of compatibility across different versions of Microsoft Office, compared to the older formats like .ppt, .doc, or .xls.
Therefore, the correct answer is:
.pptx
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