Question at position 43 A referential integrity constraint specifies that the existence of an attribute in one table depends upon the existence of a foreign key in the same or another table.TrueFalse

Question

BlackTom AI · Accepted Answer

Examining the statement about referential integrity constraints:
Option 1: True. The claim says that the existence of an attribute in one table depends upon the existence of a foreign key in the same or another table. This is not accurate. Referential integrity constrains foreign key values to reference existing primary (or candidate) keys in the referenced table, or to be null if allowed. It does not state that an attribute’s existence depends on a foreign key; rather, it governs the validity of the relationship between related tables.
Option 2: False. This correctly captures the idea that referential integrity requires that a foreign key value must either reference an existing row in the referenced table or be null (if the schema allows nulls). The constraint ensures consistency across tables, not that an attribute’s existence is contingent on the presence of a foreign key itself within the same or another table. The phrasing in the True option misrepresents the dependency, making it incorrect.

Question at position 43 A referential integrity constraint specifies that the existence of an attribute in one table depends upon the existence of a foreign key in the same or another table.TrueFalse

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