Please suggest is there any way to play a ppt in aem web application. And I have uploaded the ppt file in dam.
Create a new component with code to embed PPTs into the web page.
Got this off the net but apparently this code can be used to embed PPT into a page:
<iframe src='https://view.officeapps.live.com/op/embed.aspx?src=[https://www.your_website/<path to your ppt in dam>.pptx]' width='100%' height='600px' frameborder='0'>
AEM does not support this functionality. You will need to build a new component.