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Question 1
Which two classes use the Shape class correctly?
A. public class Circle implements Shape
{
private int radius;
}
B. public abstract class Circle extends Shape
{
private int radius;
}
C. public class Circle extends Shape
{
private int radius;
public void draw();
}
D. public abstract class Circle implements Shape
{
private int radius;
public void draw();
}
E. public class Circle extends Shape
{
private int radius;
public void draw()
{
/* code here */
}
}
F. public abstract class Circle implements Shape
{
private int radius;
public void draw()
{
/* code here */
}
}
Question 2
Which of the following is true?
1. An interface can extend many interfaces.
2. A class can extend more than one class.
3. A class can extend only one class but many interfaces.
4. A class can extend one class and implement many interfaces.
5. An interface can implement many interfaces.
Question 3
What will be a class inheriting an abstract class and not define all of its functions?
Question 4
Which package has the abstract key word?
Question 5
What is the output of the following code?
abstract class Parent
{
int i;
abstract void display();
}
class Child extends Parent
{
int j;
void display()
{
System.out.println(j);
}
}
class Abstract_demo
{
public static void main(String args[])
{
Child obj = new Child();
obj.j=2;
obj.display();
}
}Question 6
Which of the following is not Abstract
Question 7
Which keyword should be used to inherit an interface?
Question 8
Which of the following satisfy multiple inheritance
Question 9
Find the statement which is true according to the following code?
class Demo
{
public abstract void display();
}Question 10
Which of the following is true regarding abstract class?
page 1 out of 3
page 1 out of 3