Back to Operating Systems
Directory Management
Directory structures and file organization systems
Key Concepts
Directory types, path resolution, file organization
Applications
File systems, operating systems, database indexing
Exam Focus
Directory design, path operations, file organization
Directory Structure Types
Single-Level Directory Structure
Directory Structure
root/
file1.txt
file2.txt
file3.txt
program.exe
data.dat
Advantages
- • Simple to implement
- • Easy to understand
Disadvantages
- • Name conflicts
- • No organization
- • Not scalable
Path Operations
Absolute Path
/home/user1/documents/file1.txtFull path from root directory
Relative Path
../documents/file1.txtPath relative to current directory
Path Resolution
cd /home/user1 && ls documents/Navigate and list directory contents
Directory Implementation Methods
Linear List
- • Simple implementation using linked list
- • Sequential search for files
- • O(n) time complexity for operations
- • Easy to implement but slow for large directories
Hash Table
- • Uses hash function for file names
- • Fast access with O(1) average case
- • Handles collisions with chaining
- • Better performance for large directories
📝 Exam Tips
- • Understand the trade-offs between different directory structures
- • Practice drawing directory trees and path resolution
- • Compare implementation methods and their complexities
- • Know how to design directory structures for specific requirements