Using Linux while a directory may seem empty because it does

Using Linux, while a directory may seem empty because it doesn\'t contain any files or sub-directories, you will always see two items if you use the command to see ALL files. What are the names of these two items, and what are they?

Solution

These hidden files are called dot files.

these files are configuration files.files which keep a track when directory information is updated.It also keeps directory size,names etc.