L69: File Directories | Single-Level, Two Level, Tree Structural and Acyclic Graph Directories 

"Full Course of Operating System: • Operating System(Full ...
In this video Concept of File Directory is explained with various operations on directory. Single-Level, Two Level, Tree Structural and Acyclic Graph Directories are also discussed. This topic is very important for College University Semester Exams and Other Competitive exams like GATE, NTA NET, NIELIT, DSSSB tgt/ pgt computer science, KVS CSE, PSUs etc"
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