Relational Algebra Starter Quiz-1

Which commands are used to control access over objects in relational database?

Which of the following is a fundamental operation in relational algebra?

For a database relation R (a, b, c, d) where the domains of a, b, c and d only include atomic values, only the following functional dependency and those that can be inferred from them hold:

a → c , b→ d

The relation is in?

What will be the cardinality of the cross product of R X S?

Which of the following key is used for implementing referential integrity?