What file extension is used to save an MS PowerPoint 2021 presentation?
.pptx
The native file format for saving a Microsoft PowerPoint 2021 presentation is .pptx. The trailing x signals the Office Open XML format, which Microsoft introduced with Office 2007 and has used ever since (including Office 2013, 2016, 2019, 2021 and Microsoft 365). This XML-based format stores the file as a compressed package of parts, which makes files smaller, more robust against corruption, and easier for other software to read than the older binary formats.
It helps to see the family of Office extensions together:
| Application | Modern extension | Older (pre-2007) extension |
|---|---|---|
| PowerPoint (presentations) | .pptx | .ppt |
| Word (documents) | .docx | .doc |
| Excel (spreadsheets) | .xlsx | .xls |
From this it is clear why the other options are wrong. The .docx extension belongs to Word documents and .xlsx belongs to Excel workbooks, so neither is a PowerPoint file. The .pdf extension is a fixed-layout, cross-platform format used mainly for sharing and printing; while a PowerPoint file can be exported to PDF, that is not the format in which the editable presentation is saved. Hence the correct extension for a PowerPoint 2021 presentation is .pptx.
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Important Questions from Microsoft Office
Which of the following statement(s) about Quick Access Toolbar in MS-Word 2010 is/are incorrect?
P: The Quick Access Toolbar has Save, Undo, and Redo buttons by default.
Q: The Quick Access Toolbar has Cut, Undo, and Redo buttons by default.
R: You can place more buttons on the Quick Access toolbar.
S: There is no option on Quick Access toolbar for "show below the Ribbon".
Which of the following is Math and trigonometric functions available in MS-Excel 365?
Which of the following shortcut key is used to quickly create a new, blank workbook in MS-Excel 2010?
Consider the following statement about the MATCH () function of MS-Excel 2010:
P: It searches for a specified item in a range of cells, and then returns the relative position of that item in the range.
Q: The MATCH function syntax is MATCH(lookup_value, lookup _array, [match_type])
R: All the arguments in a MATCH() function are required.
Which of the following statement(s) is/are true
In MS-Excel 365 which of the following appears across the top of the screen and below the title bar and contains all the commands, formulas and features needed to create data-intense spreadsheets?
