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Question

A hashing scheme is used with ___________.

A
Sequential file organization
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B
Direct file organization
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C
Indexed sequential file organization
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D
Partitioned file organization
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E
None of the above
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Solution

The correct option is B Direct file organization

A hashing scheme is used with Direct file organization.

File organization refers to the way data is stored in a file. File organization is very important because it determines the methods of access, efficiency, flexibility and storage devices to use. There are four methods of organizing files on a storage media.

A hash function is any function that can be used to map data of arbitrary size to data of a fixed size. The values returned by a hash function are called hash values, hash codes, digests, or simply hashes. Hash functions are often used in combination with a hash table, a common data structure used in computer software for rapid data lookup. Hash functions accelerate table or database lookup by detecting duplicated records in a large file. One such application is finding similar stretches in DNA sequences.


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