True or false

1- In an INSERT command, one can indicate just the attributes that have required values by listing the attribute names inside parentheses after the table name.

2-- Authorization is any condition that the database must always satisfy.

3- - A transitive dependency indicates a candidate key determining another candidate key.

4- For public-key encryption to work, there must be a scheme for encryption such that it is easy to deduce the private key for the given public key.

5- - In the Cartesian-product operation, the attributes can never be disjoint.

6- In general, if we have relations r1(R1) and r2(R2), then r1 r2 is a relation r(R) whose schema R is the concatenation of the schemas R1 and R2.

7- JavaScript can be used to perform error checks (validation) on user input on the browser.