Operating Systems - Paging vs Segmentation - Address Translation
In which scenario is segmentation preferred over paging for memory management?
In which scenario is segmentation preferred over paging for memory management?
easy🔍 Pattern Recognition Q11 of Q15
Step-by-Step Solution
Step 1: Understand segmentation's purpose
Segmentation divides memory into logical units like code, stack, and data, which can vary in size.Step 2: Analyze When fixed-size memory blocks are needed to simplify allocation
Paging uses fixed-size pages, not segmentation, so this is incorrect.Step 3: Analyze When minimizing internal fragmentation is the primary goal
Paging reduces internal fragmentation better than segmentation; segmentation can have external fragmentation.Step 4: Analyze When hardware support for address translation is limited
Both paging and segmentation require hardware support; limited hardware support is not a reason to prefer segmentation.Final Answer:
Option D -> Option DQuick Check:
Segmentation fits variable-sized logical divisions, matching the scenario described in When the program requires logical division of memory into variable-sized segments.
Quick Trick: Segmentation = logical variable-sized chunks; Paging = fixed-size blocks
Common Mistakes:
MISTAKES- Confusing segmentation with fixed-size allocation
- Assuming segmentation eliminates fragmentation
- Believing segmentation is chosen due to hardware limits
Trap Explanation:
PITFALL- Options A and C are plausible because fixed-size blocks and fragmentation are common memory concerns, but they apply more to paging. Option D correctly identifies segmentation's logical division advantage.
Interviewer Note:
CONTEXT- Tests candidate's ability to identify when segmentation is the appropriate memory management scheme.
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