Difference between sequential and direct access device
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Sequential access :
●Sequential access must begin at the beginning and access each element in order, one aftrr the other.
●Magnetic tape has only sequential access, but CDs had direct access.
●If you are on a railroad train , to go from one car to another you must use sequential access.
Direct access :
●Direct access allows the access of any element directly by locating it by its index number or address.
●Arrays allow direct access.
●When you board the train initially you have direct access.
●Direct access is faster than sequential access , but it requires some external mechanism (array index, file byte number , railroad platform ).
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