What is the primary advantage of using a Directory Acyclic Graph (DAG) structure for file systems compared to a simple tree structure?​

Correct option is A

Correct Option: (a) DAGs enable the creation of hard links, allowing a single file to have multiple directory entries.

The primary advantage of using a Directory Acyclic Graph (DAG) in file systems is that it supports hard links, enabling a single file or subdirectory to appear in multiple directories. Unlike a simple tree where each file has only one parent, a DAG allows shared references without forming cycles.

• Hard Link: A directory entry that points to the same inode as another, enabling shared access to the same file content.

• DAG in File Systems: Allows structure sharing while maintaining acyclic integrity.

• Use Cases: Efficient file versioning, backup systems, and memory optimization by avoiding duplication.