Question
Download Solution PDFWhich of the following statements are true?
(a) External Fragmentation exists when there is enough total memory space to satisfy a
request but the available space is contiguous.
(b) Memory Fragmentation can be internal as well as external.
(c) One solution to external Fragmentation is compaction.Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF(a) External Fragmentation exists when there is enough total memory space to satisfy a
request but the available space is contiguous.
This statement is incorrect. As process are loaded and removed from memory, the free memory space is broken into little pieces. External fragmentation exists when enough total memory space exists to satisfy a request but it is not contiguous; storage is fragmented into large number of small holes. External fragmentation is also known as checker boarding. Suppose we have memory blocks available of size 400KB each. But if request come for 600Kb then it cannot be allocated.
(b) Memory Fragmentation can be internal as well as external.
This statement is correct. There is an important issue related to the contiguous multiple partition allocation scheme is to deal with memory fragmentation. There are two types of fragmentation: internal and external fragmentation. Internal fragmentation exists in the case of memory having multiple fixed partitions when the memory is allocated to a process is not fully used by the process.
c) One solution to external Fragmentation is compaction.
Given statement is correct. To get rid of external fragmentation problem, it is desirable to relocated some or all portions of the memory in order to place all the free holes together at one end of memory to make one large hole. This technique of reforming the storage is known as compaction.Last updated on Jun 11, 2025
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