Which of the following file extensions is applied to a PowerPoint 365 presentation by default when you save it? 1. .pdf 2. .pptx 3. .potx 4. .ppt

Breakdown of the Problem

1. Identify the file extensions related to PowerPoint presentations.
2. Determine the default file extension used by PowerPoint 365 when saving a presentation.

Relevant Concepts

• Different file extensions indicate different types of files:
  • .pdf: Portable Document Format, used primarily for documents.
  • .ppt: PowerPoint presentation file from earlier versions.
  • .pptx: PowerPoint presentation file format introduced in Office 2007 and used in later versions, including PowerPoint 365.
  • .potx: PowerPoint template file format.

Analysis and Detail

• The default file extension for PowerPoint presentations has shifted over the years.
• In PowerPoint 365, as well as in the more recent versions, the default format when saving a presentation is .pptx.
• The .pptx format supports all the features within PowerPoint 365 and allows for better compression and XML-based storage.

Verify and Summarize

• Upon reviewing the options given:
  1. .pdf is not a PowerPoint extension.
  2. .pptx is the standard extension for presentations in Office 2007 and beyond.
  3. .potx is for templates, not standard presentations.
  4. .ppt is an older format.

Final Answer

The correct default file extension for a PowerPoint 365 presentation is .pptx.