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Computer Science Engineering (CSE) Exam  >  Computer Science Engineering (CSE) Questions  >  The buddy and power of 2 allocators are faste... Start Learning for Free
The buddy and power of 2 allocators are faster than the first-fit ,best-fit, next-fit allocators
  • a)
    True 
  • b)
    False
  • c)
    Can not be determined
  • d)
    None of the above
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
The buddy and power of 2 allocators are faster than the first-fit ,bes...
Explanation:
First, let's understand the different memory allocation algorithms briefly:
- First-fit: Allocates the first available block of memory that is large enough to fit the requested size.
- Best-fit: Finds the smallest block of memory that is large enough to fit the requested size.
- Next-fit: Similar to first-fit, but starts searching for free memory from the last allocation position.

Advantages of Buddy and Power of 2 Allocators:
1. Efficiency: Buddy and Power of 2 allocators are more efficient in terms of speed compared to the traditional allocation algorithms.
2. Reduced Fragmentation: These allocators help reduce external fragmentation by managing memory in blocks or chunks of sizes that are powers of 2.
3. Optimized Allocation: Buddy and Power of 2 allocators optimize memory allocation by dividing memory into fixed-size blocks, making it easier to find suitable blocks for allocation requests.
4. Fast Allocation and Deallocation: Buddy and Power of 2 allocators can quickly allocate and deallocate memory due to their structured approach.
5. Scalability: These allocators are scalable and can efficiently handle varying memory allocation requests.
Therefore, the statement that the buddy and power of 2 allocators are faster than the first-fit, best-fit, and next-fit allocators is true.
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Community Answer
The buddy and power of 2 allocators are faster than the first-fit ,bes...
because they avoid searches in free lists
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Which of the following statement is true for buddy system allocators? Buddy System splits and recombines memory blocks in a predetermined manner during allocation and deallocation. No splitting of blocks takes place, also no effort is made to coalesce adjoining blocks to form larger blocks; when released, a block is simply returned to its free list. When a request is made for m bytes, the allocator first check the free list containing blocks whose size is 2i for the smallest value of i such that 2i ≥ m.if the free list is empty ,it checks the list containing blocks that are higher the next higher power of 2 in size on so on. an entire block is allocated to a request. When a request is made for m bytes. the system finds the smallest power of 2 that is ≥ m. Let this be 2i.if the list is empty, it checks the lists for block of size 2i+1.it takes one block off this list and splits it into two halves of size 2i.it put one of these blocks into the free list of size 2i,and uses the other block to satisfy the request.

Which of the following statement is true for Power-of-2 allocators? Buddy System splits and recombines memory blocks in a predetermined manner during allocation and deallocation. No splitting of blocks takes place, also no effort is made to coalesce adjoining blocks to form larger blocks; when released, a block is simply returned to its free list. When a request is made for m bytes, the allocator first check the free list containing blocks whose size is 2i for the smallest value of i such that 2i ≥ m.if the free list is empty ,it checks the list containing blocks that are higher the next higher power of 2 in size on so on. an entire block is allocated to a request. When a request is made for m bytes. the system finds the smallest power of 2 that is ≥ m. Let this be 2i.if the list is empty, it checks the lists for block of size 2i+1.it takes one block off this list and splits it into two halves of size 2i.it put one of these blocks into the free list of size 2i,and uses the other block to satisfy the request.

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The buddy and power of 2 allocators are faster than the first-fit ,best-fit, next-fit allocatorsa)Trueb)Falsec)Can not be determinedd)None of the aboveCorrect answer is option 'A'. Can you explain this answer?
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