The student marks should not be greater than 100. This is

Answer: Integrity constraint

Explanation:

• Integrity constraints enforce valid data values or domains for attributes. The rule that student marks should not be greater than 100 is a value/domain integrity constraint.

• Common ways to implement this in a database include a CHECK constraint or defining a suitable domain/data type that limits the allowed range.

• Referential constraints (foreign keys) enforce relationships between tables and do not limit numeric ranges; other listed terms are not the correct database constraint for this rule.

Example (SQL):

• ALTER TABLE Students ADD CONSTRAINT chk_marks CHECK (marks <= 100);

• Or define the column with a constrained domain or numeric type and validate input in the application layer as needed.