What are the advantages and disadvantages of indexed-sequential file organization?

Answer

There are following advantage of indexed files. 1.       Any record can be used with help of any key. 2.       Quite easy to execute. 3.       Searching process is fast. And disadvantages are: 1.       User is not able to maintain extracted data. 2.       The performance of programming decrease with the addition of new records.
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Sequential file - like a video tape - only accessed from start to end, you must read it in a sequence fashion, i.e. you must step through it if you want to find something. If you
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