A data dictionary is a special file that contains:
2015
A data dictionary is a special file that contains:
- A.
names of all fields in all files.
- B.
data types of all fields in all files.
- C.
width of all fields in all files.
- D.
all of these.
- E.
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Correct answer: D
A data dictionary is a metadata repository that provides detailed information about data elements in a database or system. It typically includes the names of all fields, their data types (such as integer, string, date), and the width or size of each field. This helps in understanding, managing, and maintaining data consistently across systems.