Question:Write down the all the post format available in WordPress? 

The available post formats in WordPress: 
                  Standard (text)
                  Image
                  Image gallery
                  Link
                  Video
                  Audio
                  Chat transcript
                  Status (a brief update)
                  Quote (a quote, its source, and a link URL)
                  Aside

Question:What is short code in WordPress? 

Short codes are bracketed words that are replaced with content when the post is displayed to visitors. Shortcodes work like text macros in Microsoft Word.

Question:What do you mean by tags? 

Tags are subject key word that are used to drive search engine optimization where an editor or administrator, authors are free to create new tags simply by typing them into the Tag box while writing a post.

Question:What do you mean by Featured Images and Excerpts? 

Featured Images: The featured image (formerly known as the post thumbnail) is an image that represents a post which might be shown by itself, depending on how a theme displays posts.Excerpts: An excerpt is, as the box says in WordPress, a summary of a post. Excerpts are shown with a continuation string. By default, ‘[...]’ is appended to your excerpt text, which is 55 words long.

Question:Deference between comments and trackback? 

Comments are readers’ responses to posts. They are written in a small form on a post or a page and, once approved, are displayed in a list below the post. 
Whereas, Trackbacks are automated alerts that someone has referenced a post or a page on their own site. It lets know that conversations are taking place elsewhere about something the author wrote.

Question:What is the page attributes? 

Page attributes are arranging the pages into filesystem-like hierarchies by making them children of parent pages. In the Attributes box on any single page’s Edit screen, we’ll be able to select another existing page as the parent which in turn, have another parent, and so on.

Question:Write down the deference between posts and pages? 

Posts are shown in a chronological sequence on a single page, such as your home page or an archive of posts from a particular date and can also be tagged or filed into category.
        Pages are generally not grouped in chronological order. It will appear on its own screen. Anyone can create a list of pages using a widget or a menu.
        Moreover, comments are allowed in post but in page it’s not allows.