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A data dictionary is a special file that contains:

  • A.The name of all fields in all files.
  • B.The width of all fields in all files.
  • C.The data type of all fields in all file
  • D.All of the above

Answer: D

Correct answer: All of the above

A data dictionary holds the complete description of the data: the name, type and width of every field in every file, together with keys, indexes, constraints and often who may access what. It is metadata, and in a relational database it is itself queryable.

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