Question: What is the error preventing compilation? public class ExamQuestion { public int attr; public void swap (int x, int y) { int temp =

What is the error preventing compilation? public class ExamQuestion { public int attr; public void swap (int

What is the error preventing compilation? public class ExamQuestion { public int attr; public void swap (int x, int y) { int temp = x; x = y; y = temp; public static void main(String [] args) { this.swap (7, 4)

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