Question: A sequential file has 1000 million records. How does efficiency in access improve by using a three- level index? Assume 100 entries in the highest-

A sequential file has 1000 million records. How does efficiency in

A sequential file has 1000 million records. How does efficiency in access improve by using a three- level index? Assume 100 entries in the highest- level index, 10.000 entries in the middle-level index and 1000,000 entries in the lower-level index. Explain how to search for a specific record in the sequential file

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