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Question

An indexed file organisation offers access method to a _______________.

A
Sequential file
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B
Indexed file
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C
Direct access file
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D
Random access file
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Solution

The correct option is B Indexed file

An indexed file organisation offers access method to a Indexed file

An indexed file is a computer file with an index that allows easy random access to any record given its file key. The key must be such that it uniquely identifies a record. If more than one index is present the other ones are called alternate indexes. The indexes are created with the file and maintained by the system.

Indexed file organization. An indexed file contains records ordered by a record key . The possible record transmission (access) modes for indexed files are sequential, random, or dynamic. When indexed files are read or written sequentially, the sequence is that of the key values.

ISAM (Indexed Sequential Access Method) is a file management system developed at IBM that allows records to be accessed either sequentially (in the order they were entered) or randomly (with an index). Each index defines a different ordering of the records.

Indexed file organization. An indexed file contains records ordered by a record key . A record key uniquely identifies a record and determines the sequence in which it is accessed with respect to other records. ... The possible record transmission (access) modes for indexed files are sequential, random, or dynamic.


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