The data stores definitions of information types, identifies the primary and foreign keys, and maintains the relationships.
A. NoSQL spool Map
B. Reduction
C. Dictionary
D. Query language
E. Hadoop link

C: Dictionary

Explanation:

The Data dictionary stores definitions of information types, identifies the primary and foreign keys, and maintains relationship between elements that are used in the control of access and for manipulating a database. It is usually a set of information that provides the description of a database's format, contents and structure.

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answer7 pin connector;