List of top Computer Science Questions on Relational Algebra Operations

Which of the following are to be considered while applying JOIN operations on two or more relations?
A. If two tables are to be joined on equality condition on the common attribute, then one may use JOIN with ON clause or NATURAL JOIN in FROM clause.
B. If three tables are to be joined on equality condition, then two JOIN or NATURAL JOIN are required.
C. N-1 joins are needed to combine N tables on equality condition.
D. With JOIN clause, we may use any relational operators to combine tuples of two tables.
Choose the correct answer from the options given below:

Identify the relational algebra operation denoted by: \[ \text{Course X Student;} \] where 'Course' and 'Student' are two relations and X is an operation.

__________ operation is used to get the common tuples from two relations.