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How to access data using sequential and using direct access?

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Can you describe to a 3rd grade student how to store and retrieve data using sequential and using direct access methods?

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Solution Summary

The expert describes the two methods of data access.

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Sequential access and direct or Random access are two ways of storing and retrieving data to and from a disk drive. In most operating systems data is stored in files. The operating system abstracts the hardware details of storing a data in a file. The users generally do not care how the file is stored on the hardware, how the sectors on the hard drive are arranged, etc. ...

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