Question $3$

$2pts$

Regarding Trivial Functional Dependency, which best describes non$-$trivial?

$$ If an $FDxY$ holds, where $x$ intersect $Y=$

None of these

If a functional dependency $($FD$)xY$ holds, where $Y$ is a subset of $x$

If an FD $xY$ holds, where $Y$ is not a subset of $x$

Question $4$

$2$ pts

What is a join regarding DBMS$?$

a Cartesian product of two relations

a Cartesian product followed by a selection proces$5$

None of these

join operation pairs two tuples from different relations