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Which characteristic of memory allocation makes the buddy system more efficient than static partitioning?

easy💻 Programming Q1 of Q15
Operating Systems - Internal vs External Fragmentation - Compaction & Buddy System
Which characteristic of memory allocation makes the buddy system more efficient than static partitioning?
AFixed-size partitions allocated at system startup
BAbility to split and merge blocks dynamically to fit varying request sizes
CAllocation of memory only in contiguous large blocks
DUse of linked lists to track free memory blocks
Step-by-Step Solution
Solution:

  1. Step 1: Understand static partitioning

    Static partitioning divides memory into fixed blocks, which can lead to wasted space.

  2. Step 2: Analyze buddy system features

    The buddy system splits and merges blocks in powers of two, adapting to request sizes dynamically.

  3. Final Answer:

    Option B -> Option B

  4. Quick Check:

    Dynamic splitting and merging reduces fragmentation [OK]
Quick Trick: Dynamic splitting and merging is key to buddy system efficiency [OK]
Common Mistakes:
MISTAKES
  • Confusing fixed partitioning with dynamic allocation
  • Assuming buddy system uses fixed-size blocks only
  • Believing linked lists are unique to buddy system
Trap Explanation:
PITFALL
  • Options B and C describe static allocation, which buddy system improves upon.
Interviewer Note:
CONTEXT
  • Tests understanding of dynamic memory allocation advantages in buddy system.
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