CompTIA ITF+ (FC0-U61) — Question 14

Which of the following describes something in a database that refers to the unique identifier in the parent table?

Answer options

• A. Attribute
• B. Constraint
• C. Foreign key
• D. Schema

Correct answer: C

Explanation

The correct answer is C, Foreign key, as it specifically denotes a field in one table that links to the primary key of another table, establishing a relationship. Options A, B, and D do not pertain to this relational concept; an Attribute refers to a column in a table, a Constraint is a rule applied to data in a table, and a Schema refers to the overall structure of the database.