Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Fragmentation isa)Dividing the secondary memo...
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Fragmentation is
- a)Dividing the secondary memory into equal sized fragments
- b)Dividing the main memory into equal-size fragments
- c)Fragments of memory words used in a page
- d)Fragments of memory words unused in a page
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Fragmentation isa)Dividing the secondary memory into equal sized fragm...
Fragmentation is basically dividing main memory into fragments [smaller size parts] usually of the same size, it is of two types:
(i) External fragmentation
(ii) Internal fragmentation.
(i) External fragmentation
(ii) Internal fragmentation.
Most Upvoted Answer
Fragmentation isa)Dividing the secondary memory into equal sized fragm...
Fragmentation refers to the phenomenon of memory becoming divided into small, non-contiguous chunks, which can result in inefficiencies in memory usage. There are different types of fragmentation that can occur in computer memory.
Types of Fragmentation:
1. Internal Fragmentation:
- Internal fragmentation occurs when a process requests a certain amount of memory, but is allocated more than it actually needs.
- This results in the remaining memory being wasted, as it cannot be used by other processes.
- Internal fragmentation usually occurs in fixed-size memory allocation systems.
2. External Fragmentation:
- External fragmentation occurs when there is not enough contiguous memory to satisfy a process request, even though the total amount of free memory is sufficient.
- This can happen when memory is allocated and released in an unpredictable manner, leaving small gaps of unusable memory.
- External fragmentation usually occurs in dynamic memory allocation systems.
3. Paging Fragmentation:
- In a paged memory system, memory is divided into fixed-size pages, and a process's memory is allocated in non-contiguous pages.
- Paging fragmentation occurs when there are not enough contiguous free pages to satisfy a process request, resulting in unused fragments of pages.
4. Segmentation Fragmentation:
- In a segmented memory system, memory is divided into segments of varying sizes, and each segment is allocated to a different process.
- Segmentation fragmentation occurs when there are not enough contiguous free segments to satisfy a process request, resulting in unused fragments of segments.
Therefore, option B is correct as it refers to dividing the main memory into equal-size fragments, which can help prevent internal and external fragmentation in dynamic memory allocation systems.
Types of Fragmentation:
1. Internal Fragmentation:
- Internal fragmentation occurs when a process requests a certain amount of memory, but is allocated more than it actually needs.
- This results in the remaining memory being wasted, as it cannot be used by other processes.
- Internal fragmentation usually occurs in fixed-size memory allocation systems.
2. External Fragmentation:
- External fragmentation occurs when there is not enough contiguous memory to satisfy a process request, even though the total amount of free memory is sufficient.
- This can happen when memory is allocated and released in an unpredictable manner, leaving small gaps of unusable memory.
- External fragmentation usually occurs in dynamic memory allocation systems.
3. Paging Fragmentation:
- In a paged memory system, memory is divided into fixed-size pages, and a process's memory is allocated in non-contiguous pages.
- Paging fragmentation occurs when there are not enough contiguous free pages to satisfy a process request, resulting in unused fragments of pages.
4. Segmentation Fragmentation:
- In a segmented memory system, memory is divided into segments of varying sizes, and each segment is allocated to a different process.
- Segmentation fragmentation occurs when there are not enough contiguous free segments to satisfy a process request, resulting in unused fragments of segments.
Therefore, option B is correct as it refers to dividing the main memory into equal-size fragments, which can help prevent internal and external fragmentation in dynamic memory allocation systems.
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Fragmentation isa)Dividing the secondary memory into equal sized fragmentsb)Dividing the main memory into equal-size fragmentsc)Fragments of memory words used in a paged)Fragments of memory words unused in a pageCorrect answer is option 'B'. Can you explain this answer?
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