Relational Operations MCQ (Multiple Choice Questions) PDF Download

The operation which is used to take union of tuples from the relations that are not union compatible is classified as

1. FULL UNION operation
2. JOIN UNION operation
3. OUTER UNION operation
4. INNER UNION operation

If matching tuples are not found, the kind of OUTER JOIN operation which keeps all the tuples of first and second relation is classified as

1. LEFT OUTER JOIN
2. FULL OUTER JOIN
3. HALF OUTER JOIN
4. DOWNWARD JOIN

The operations which are used to enhance the power of expression of relational algebra includes

1. generalized projection
2. recursive closure operations
3. outer JOIN operations
4. all of above

If the common attributes of two relations are classified as join attributes then the OUTER UNION must be equal to

1. LEFT OUTER JOIN
2. FULL OUTER JOIN
3. HALF OUTER JOIN
4. DOWNWARD JOIN

If matching tuples are not found, the kind of OUTER JOIN operation which keeps all the tuples of second relation out of the two relations is classified as

1. UPWARD JOIN
2. DOWNWARD JOIN
3. LEFT OUTER JOIN
4. RIGHT OUTER JOIN