Answer / Gyan Prakash Gupta

Cardinality in DBMS refers to the number of instances of one entity that can be related to another. It has two types: "One-to-one (1:1)", which means each instance of one entity is related to exactly one instance of another; "One-to-many (1:N)", which means each instance of one entity can be related to multiple instances of another, but each instance of the other has only one relation; and "Many-to-many (N:M)", which means multiple instances of both entities can be related.

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