DBI202Xuất hiện trong 1 đề thi
For what values of x, y, and z, including NULL, does the Boolean expression $x <= 3$ OR NOT($y >= 1$ AND $z = 5$) have the truth value FALSE? Identify one of those values from the list below
Các lựa chọn
A$x = 4$, $y = 3$, $z = 5$.
B$x = 3$, $y = 1$, $z = 5$.
C$x = \text{NULL}$, $y = 2$, $z = 5$.
D$x = \text{NULL}$, $y = 3$, $z = 5$.