Given the partial NMOS EPROM encoder shown, where Y is some select line,
determine the values of the output data lines D2D1D0 when Y = 1.
2 is WRONG. You need to identify the on-off transistors with negatively charged floating gates; these transistors will remain OFF and the vertical data lines connected to these OFF transistors will go high when Y = 1 through the top R-transistors. The other data lines will be grounded by the ON transistors (with uncharged floating gates), and thereby go low.