Semiconductor memory is used mainly for primary storage even with its high cost. in another hand, the magnetic tape is the cheapest storage media and it is commonly preferred only as backup storage! use your own words to discuss how the storage cost, speed and capacity trade-offs can affect the choice of storage media.

answer: internal fragmentation is the difference between the (fixed) size of a memory hole and the data within in that memory. for example, if a 1,024 byte block of memory holds 800 bytes of data, then the 224 bytes difference is considered lost to internal fragmentation.

external fragmentation occurs when the sum of memory fragments is large enough to satisfy a request, but the holes are non-contiguous and the request cannot be satisfied. this can occur when memory is dynamically allocated and freed.

explanation:

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