What is the reference count field in the inode? You should consider its relationship to
directory entries in your answer.
Answer:
-The reference count field is a counter of how many times the inode is “referenced” by name. Adding a directory entry increments this counter. When the count falls to zero, (i.e. there are no longer any directory entries to that file), its inode and all corresponding disk blocks can be safely deallocated
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Define the word operating system. 
