It is recommended that you format CDs or hard drives at least seven times before discarding them (writing binary zeros). How come you repeated it seven times?

Q: The conditions under which the database designer should employ supertype and subtype connections are…

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A:

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A: Answer:

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Random Access

Random access is generally known as direct access. Random access is the capability to have access to any item from a given population of elements at random. Sequential access is the direct opposite of random access. In random access, the elements can be retrieved irrespective of the location. In order to move from point A to Z,  you can just jump to point Z in random access system. The disk is an example of random access.