1. If a column or a set of columns of Table A correspond to a primary key of another Table B, then these set of columns in Table A are known as a _______ key.   primary   foreign   reference   Hint Half-n-half Clue   2. The domain in the relational model is said to be atomic if the elements of the domain consist of _______ units.   divisible   redundant   indivisible   distinct   Half-n-half Clue   3. What is the set of attributes that collectively identify an entity in an entity set known as?   Super Key   Foreign Key   Unique Key   None of these   Half-n-half Clue   4. In Relational Model, rows are referred to as _______ and columns are referred to as _______.   connectors, nodes   attributes, tuples   nodes, connectors   tuples, attributes   Half-n-half Clue   5. In the Relational Model, each _______ contains values for the _______.   tuple, attributes   attribute, tuples   entity, domains   relation, entities   Half-n-half Clue   6. SYSTEM2000 is an example of _______ database.   network   hierarchical   relational   object - oriented   Half-n-half Clue   7. In the Relational Model, the number of columns in a table is termed as _______.   cardinality   degree   domain   None of these   Half-n-half Clue