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Single level directory:
This is the easiest directory structure. All the files are controlled in the same directory, which is simple to support and understand.
Few of the limitations of this structure are:
Since all the files are in the similar directory they must have unique names. A user may perhaps have hundreds of files and hence will find it tedious to remember the names of all the files. Problems as well arise when there are multiple users. For instance, if two users settle on to call their data files test, after that the file names will no longer be unique. Naming a file is habitually based on its contents. It is complex to give unique names since there are limits imposed on the length of the file name.
Diagram of single level directory
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