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Explain, in a maximum of ten sentences, why secondary storage is required.
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- The most important tables in the library information system are the following. Books (bid, author, title, publisher, year); Members (mid, name, surname, address, telephone); Rental (rid, mid, bid, eid, date); Employee (eid, name, surname, address, telephone) All tables are sorted according to the key. The following information is given. 1 page on the disk = 8KB |Books| = 1.000.000 records, 320 bytes, 25 records/page, 40000 pages |Members| = 10.000 records, 200 bytes, 40 records/page, 250 pages |Rental| = 300.000 records, 40 bytes, 200 records/page, 1500 pages |Employee| = 100 records, 200 bytes, 40 records/page, 3 pages We can have 25.000 pages in the buffer. QUESTION 2.1 B+ index is used on the attribute Books.publisher. The size of the record identifier is 8B, the size of the page identifier is 6B. Calculate the size of the B+ index whose pages are filled to their minimum capacity as accurately as possible. Write down all assumptions.the study of computers and their uses. What are the advantages and disadvantages of transmitting information by reference vs passing information by value, respectively?Are there any noteworthy discrepancies between the results of search engines and library databases while doing research on certain topics?
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