Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Buddy system and power of 2 allocators leads ...
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Buddy system and power of 2 allocators leads to ___________
- a)External fragmentation
- b)Internal Fragmentation
- c)No fragmentation
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Buddy system and power of 2 allocators leads to ___________a)External ...
Explanation:
Buddy System Allocator:
- In a buddy system allocator, memory is divided into blocks of size 2^n where n is a non-negative integer.
- When a request for memory is made, the allocator splits the block into two equal-sized buddies.
- These buddies are then assigned to the requester and the remaining block is marked as free.
Power of 2 Allocator:
- In a power of 2 allocator, memory is allocated in blocks that are a power of 2 in size.
- Each block is divided into smaller blocks of size 2^k where k is a non-negative integer.
- When a request for memory is made, the allocator selects the smallest available block that can accommodate the request.
Internal Fragmentation:
- Internal fragmentation occurs when memory is allocated to a process in chunks larger than what is needed.
- In the buddy system and power of 2 allocators, internal fragmentation can occur due to the fixed block sizes and splitting of blocks.
Conclusion:
- The buddy system and power of 2 allocators can lead to internal fragmentation because of the fixed block sizes and splitting of blocks.
- This fragmentation occurs when the allocated memory is larger than what is actually required by the process, leading to wastage of memory.
Buddy System Allocator:
- In a buddy system allocator, memory is divided into blocks of size 2^n where n is a non-negative integer.
- When a request for memory is made, the allocator splits the block into two equal-sized buddies.
- These buddies are then assigned to the requester and the remaining block is marked as free.
Power of 2 Allocator:
- In a power of 2 allocator, memory is allocated in blocks that are a power of 2 in size.
- Each block is divided into smaller blocks of size 2^k where k is a non-negative integer.
- When a request for memory is made, the allocator selects the smallest available block that can accommodate the request.
Internal Fragmentation:
- Internal fragmentation occurs when memory is allocated to a process in chunks larger than what is needed.
- In the buddy system and power of 2 allocators, internal fragmentation can occur due to the fixed block sizes and splitting of blocks.
Conclusion:
- The buddy system and power of 2 allocators can lead to internal fragmentation because of the fixed block sizes and splitting of blocks.
- This fragmentation occurs when the allocated memory is larger than what is actually required by the process, leading to wastage of memory.
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Community Answer
Buddy system and power of 2 allocators leads to ___________a)External ...
It performs allocation of memory in blocks of a few standard sizes.this features leads to internal fragmentation because some memory in each allocated memory block may be wasted.
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Buddy system and power of 2 allocators leads to ___________a)External fragmentationb)Internal Fragmentationc)No fragmentationd)None of the aboveCorrect answer is option 'B'. Can you explain this answer?
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