quiz 2

What is Inheritance in Java programming? 

• Inheritance in Java programming is a way to create new classes.
• Inheritance in Java programming involves copying all properties from a superclass to a subclass.
• Inheritance in Java programming allows a subclass to inherit properties and behaviors from a superclass.
• Inheritance in Java programming is not supported by the language.

Which keyword is used for inheritance in Java?

• extends
• inheritable
• inheritance
• inherit

Can a class inherit constructors from its superclass in Java? 

• yes

• No

• irrelevent

• none of the above

What is a subclass in Java inheritance?

• A subclass in Java inheritance is a class that inherits attributes and methods from another class called a superclass.
• A subclass in Java inheritance is a class that can only have private attributes and methods.
• A subclass in Java inheritance is a class that does not inherit anything from a superclass.
• A subclass in Java inheritance is a class that inherits attributes and methods from a subclass.

What is the parent class of all classes in Java? 

• Object
• Root
• Parent
• Main

Can we perform multiple inheritance in Java? 

• Sometimes
• Maybe
• Yes
• No

Can a subclass inherit private members of its superclass?

• No
• Only if explicitly allowed
• Sometimes
• Yes

Can interfaces be used to achieve multiple inheritance in Java? 

• Yes
• Sometimes
• Only in specific cases
• No

What is the output of the following Java program?

public class Vehicle { public void move() { System.out.println("The vehicle moves"); } }

public class Car extends Vehicle { public void move() { System.out.println("The car moves"); } } public class Main { public static void main(String[] args) { Vehicle vehicle = new Car(); vehicle.move(); } }

• The car moves
• The bike moves
• The truck moves
• The vehicle moves

What is the output of the following Java program?

class Parent { String name = "parent"; String message() { return "from parent"; } }

class Child extends Parent { String name = "child"; String message() { return "from child"; } }

public class Main { public static void main(String[] args) { Parent p = new Child(); System.out.println(p.name + " " + p.message()); } }

• child from parent
• parent from parent
• child from child
• parent from child