Abstract - Discussion Page For Q.2493 | Java Programming Questions and Answers | Java Programming Free Online-Tests | LucentBlackBoard

Home > Java Programming > Abstract > Questions and Answers

abstract class Vehicle {
public int speed() { return 0; }
class Car extends Vehicle { public int speed() { return 60; }
class RaceCar extends Car { public int speed() { return 150; } ...
RaceCar racer = new RaceCar();
Car car = new RaceCar();
Vehicle vehicle = new RaceCar();
System.out.println(racer.speed() + ", " + car.speed() + ", " + vehicle.speed());
}

What is the result?

A.	0, 0, 0	B.	150, 60, 0
C.	Compilation fails.	D.	150, 150, 150
E.	An exception is thrown at runtime.

Answer and Explanation

Answer:150, 150, 150

Explanation:
just normal flow of execution.

Comment on this Question
Name:

LucentBlackBoard.com has the web's largest collection of over 15,000 aptitude questions and answers with detailed explanation which include subjects like Arithmetic Aptitude, Logical Reasoning, Verbal Ability, General Knowledge, Programming Skills and more!

Our online education portal provides a unique and standard learning experience for students. We enable the students to prepare for most of the entrance and competitive exams like MBA (MAT, GMAT), Engineering (IIT-JEE, AIEEE, GATE), Employment (IAS, Bank PO, Railway, UGCNET), Civil Services and many more. We bring you the best in education by providing technical excellence and creating innovative solutions. We provide facility for online test preparation that offers 24/7 access to relevant subject matter and relative tests. These test preparations help the students to groom themselves and get prepared before actually facing the examination.