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 ________.
In the signal flow graph of given figure, \( \frac{y}{x} \) equals ________.
For the circuit shown in the figure, the delay of the bubbled NAND gate is 5 ns and that of the counter is assumed to be zero. If the clock (Clk) frequency is 12 MHz, then the counter behaves as a ________.
The circuit shown in the figure can be used as a ________.