Answer (Choose 1 answer)
What is the output of the following program?
class Van {
String driver; int rate;Van() { driver="unknown"; rate = 5; }
Van(String driver, int rate) {
this.driver-driver; this.rate-rate;
}
public String toString() {return(driver+","+rate);}
}
class SpecVan extends Van {
int type;SpecVan() {}
SpecVan(String driver, int rate, int type) { super(driver, rate);
this.type=type;
} void display() {
String s = "("+super.toString()+","+type+") ";System.out.println(s);}
} public class Main {
public static void main(String[] args) {
SpecVan x = new SpecVan();
SpecVan y = new SpecVan("Hoa", 20, 10);x.display(); y.display();
System.out.println();
}
A. (unknown,5,0)(Hoa, 20, 10)
B. (null,0,0)(Hoa, 20,10)
C. (null,0,5)(Hoa, 20, 10)
D. (null,5,5)(Hoa, 20,10)
Iv
Exit 15
