The term that optimizes subexpressions shared by different expressions in a program is called ________.
The optimizer that explores the space of all query-evaluation plans is called ________.
The database design that consists of multiple tables that are linked together through matching data stored in each table is called a _______.
If A $\to$ B has trivial functional dependency, then _______.
Let a random variable \( X \) follow Poisson distribution such that \( P(X = 0) = 2P(X = 1) \). Then, P(X = 3) = ______
The probability distribution of a random variable \( X \) is given as follows. Then, \( P(X = 50) - \frac{P(X \leq 30)}{P(X \geq 20)} \) =