Oracle
1Z0-808 · Question #42
1Z0-808 Question #42: Real Exam Question with Answer & Explanation
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Working with Inheritance
Question
Given:
class Vehicle {
String type = "4W";
int maxSpeed = 100;
Vehicle(String type, int maxSpeed) {
this.type = type;
this.maxSpeed = maxSpeed;
}
}
class Car extends Vehicle {
String trans;
Car(String trans) { //line n1
this.trans = trans;
}
Car(String type, int maxSpeed, String trans) { //line n2
super(type, maxSpeed);
this.trans = trans;
}
}
And given the code fragment:
7. Car c1 = new Car("Auto");
8. Car c2 = new Car("4W", 150, "Manual");
9. System.out.println(c1.type + " " + c1.maxSpeed + " " + c1.trans);
10. System.out.println(c2.type + " " + c2.maxSpeed + " " + c2.trans);
What is the result?Options
- A4W 100 Auto
- B4W 150 Manual
- CNull 0 Auto
- D4W 150 Manual
- ECompilation fails only at line n1
- FCompilation fails at both line n1 and line n2
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Topics
#Implicit super()#Constructor chaining#Inheritance#No-arg constructor