You can use the Question & Answer plugin to create a complete Question and Answer system for your site, similar to Quora or Stackoverflow. This article will walk you through the process of creating a question.
Click on Create a new question button on the Question Browse page.
Go to Create Question page
Input data to these fields:
 Enter title.
 Enter the description.
 Click here to upload attachment files (photos, documents,..)
 Select category.
 Upload the thumbnail.
 Choose the privacy for the post.
 Enter hashtags.
=> Click the Save button. The question has been added successfully.