a) Corresponds to -i. Tuple ii. Columns iii. Attributes b) An attribute whose values match primary key values in the related table i. Foreign key ii. Secondary key iii. Superkey (MARKS: 40.5=2 ) iv. Superkey c) Which of the following is true regarding a TABLE? ii. Machix consisting of row/column intersections iii. Should have a primary keyts an attribute iv. All of the above Constraint is a restriction placed on data, usually expressed in the form of rules [TTRUE / FALSE] (row) in another relation. 2. Entity exists in database only when it is associated with another related entity occurrence 3. Relatively simple representations of complex realworld data structures