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Question
What will be the result of compiling and executing the following program code?
class Vehicle{
public void printSound(){
System.out.print("vehicle");
}
}
class Car extends Vehicle{
public void printSound(){
System.out.print("car");
}
}
class Bike extends Vehicle{
public void printSound(){
System.out.print("bike");
}
}
public class Test{
public static void main(String[] args){
Vehicle v = new Car();
Bike b = (Bike) v;
v.printSound();
b.printSound();
}
}
Options:
A .  Compilation fails.
B .  ClassCastException exception is thrown at runtime.
C .  "vehiclecar" is printed.
D .  "vehiclebike" is printed.
E .  "carcar" is printed.
Answer: Option B

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