Which option represents a legal invocation of the method square()?
public static String square(int a) {
return ("Commencing");
}
A) int a = square(4);
B) String a = square("help");
C) double a = square(4.0);
D) String a = square(4);

Question

Quizplus · Accepted Answer

The method square() returns a String, and option D assigns the result to a variable of type String. However, the argument passed to the method should be an int, so passing a value of 4 is appropriate. Option A assigns the result of the method call to a variable of type int, which will not work since the method returns a String. Option B passes a String argument, which does not match the method signature. Option C passes a double argument, which also does not match the method signature. Therefore, option D is the only choice that correctly invokes the square() method.

Which Option Represents a Legal Invocation of the Method Square()