Discussion about paging segmentation and contiguous memory allocation

1. External Fragmentation:

   - Contiguous memory allocation can have empty spaces between processes, reducing available memory.

   - Segmentation can also have gaps in memory when segments of varying sizes are allocated and deallocated.

   - Pure paging avoids external fragmentation as memory is divided into fixed-size pages.

2. Internal Fragmentation:

   - Contiguous memory allocation may waste space when a process is given more memory than it needs.

   - Segmentation does not have internal fragmentation since each segment is allocated exactly the size it requires.

   - Pure paging also does not have internal fragmentation since memory is divided into fixed-size pages.

3. Ability to Share Code across Processes:

   - Contiguous memory allocation makes it hard to share code.

   - Segmentation allows for easy code sharing among processes.

   - Pure paging also supports code sharing by mapping the same pages into multiple processes.

In summary, segmentation indeed avoids internal fragmentation, making it an attractive option in some scenarios. Pure paging is more efficient in terms of fragmentation and allows for code sharing, making it another good choice for specific use cases. Each memory organization scheme has its strengths and weaknesses, and the choice depends on the specific requirements of the system. Keep learning and exploring! If you have more questions, feel free to ask.