Identify  the  root  folder  in  the  absolute  path  /folder1/folder2/folder3/file.

The folder 1 is the root folder followed by all other sub-folders, which is absolute path/folder1/folder2/folder3/file

Explanation:

From the given question , we find the root folder

Root folder: it can be defined as the folder that is at the top of  all hierarchy, folders comprising of all other folders

A path that begins from the root folder and moves down the entire folder structure is given as this  path/folder1/folder2/folder3/file

Therefore the absolute path starts from the root folder,

where folder1 is the root folder, followed by the sub-folders