Random Access Vs. Sequential Access Memory
Memory can also be classified into two categories whether the time taken to access a piece of data from the memory unit is independent or dependent of the location of the data in the memory unit.
Random Access Memory
In this type of memory, any location can be directly accessed by the CPU. Time taken to access a piece of data from this memory unit is independent of the location of the data in the memory. In other word, the access time is the same for any address in memory. Data can be read from or written into this memory. In almost all computer systems, the primary memory has random access property.
Example: RAM and ROM
Sequential Access Memory
It is a type of memory in which the access time is not constant, but varies depending on the storage location of the data. A particular stored word is found by sequencing through all address location until the desired address is reached. This produces access time, which are much longer than those of random access memory.
Example: Magnetic tape memory.
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