In computer storage, fragmentation is a phenomenon in which storage space is used inefficiently, reducing capacity or performance and often both. Boundary tags ,is a status descriptor for a memory area. External Fragmentation exists when there is enough total memory space to satisfy a request but the available space is contiguous. Fragmentation, External Fragmentation, Internal Fragmentation in operating systems (OS). External Internal vs External Fragmentation Difference between internal and external fragmentation is a topic of interest to many who like to improve their computer knowledge. Internal vs. External fragmentation can be reduced by compaction or shuffle memory contents to place all free memory together in one large block. External Fragmentation: External Fragmentation happens when a dynamic memory allocation algorithm allocates some memory and a small piece is left over that cannot be effectively used. In External fragmentation,merging of free memory areas using boundary tags.which of the following statement stands TRUE. External fragmentation exists when : A. enough total memory exists to satisfy a request but it is not contiguous B. the total memory is insufficient to satisfy a request C. a request cannot be satisfied even when the total memory is External fragmentation exists when there is enough total memory space to satisfy a request but the available spaces are not contiguous: storage is … External Fragmentation Total memory space is enough to satisfy a request or to reside a process in it, but it is not contiguous, so it cannot be used. External fragmentation: External fragmentation, on the other hand, can be eliminated by compaction, paging and segmentation so that memory can be allocated to a process in a non-contiguous manner. The user of a computer continuously load and unload the processes from the main memory. The exact consequences of fragmentation depend on the specific system of storage allocation in use and the particular form of fragmentation. This is a false statement because external fragmentation occurs due to non contigious available It consists of an ordered pair giving allocation status of the area;whether it is free or allocated.

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