Question

Help with Java Programming?
Consider the following declrations.
int y = 5;
int z = 10;
Which of the following expressions evaluates to true?
A. y > 5 && z >= 10
B. z / y >= 2 && y * 2 > z
C. y - z > 0 || y * 4 == z * 2
D. y + z == z + y && z - y == y - z

Answer 1

The or statement.

Answer 2

You must consider this rules:
For OR ( In java is || ):
(true condition) or (false condition) = true declaration , in java (or) is equals to ||
(false condition) or (true condition) = true declaration
(false condition) or (false condition) = false declaration

(In OR, It Just needs one true condition for the declaration has be true)

For AND (In java is && ):
(true condition ) AND (false condition) = false declaration
(true condition) AND (false condition) = false declaration
(false condition) AND (false condition) = false declaration
(true conditoin) AND (true condition) = true declaration

(In AND, It needs both true conditions for the declaration has be true)

ATT: the sol. is C.

Answer 3

In C, the second condition : y * 4 == z * 2 is true , therefore, the declaration is true. (Remember the OR rules).