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- 1. Multiple Choice
Which of this keyword must be used to inherit a class?
super
this
extends
extent
- 2. Multiple Choice
A class member declared protected becomes a member of subclass of which type?
public member
private member
protected member
static member
- 3. Multiple Choice
class A
{
int i;
void display()
{
System.out.println(i);
}
}
class B extends A
{
int j;
void display()
{
System.out.println(j);
}
}
class inheritance_demo
{
public static void main(String args[])
{
B obj = new B();
obj.i=1;
obj.j=2;
obj.display();
}
}
0
1
2
Compilation Error
- 4. Multiple Choice
What will be the output of the following Java program?
class A
{
int i;
}
class B extends A
{
int j;
void display()
{
super.i = j + 1;
System.out.println(j + " " + i);
}
}
class inheritance
{
public static void main(String args[])
{
B obj = new B();
obj.i=1;
obj.j=2;
obj.display();
}
}
2 2
3 3
2 3
3 2
- 5. Multiple Choice
Using which of the following, multiple inheritance in Java can be implemented?
Interfaces
Multithreading
Protected methods
Private methods
- 6. Multiple Choice
In order to restrict a variable of a class from inheriting to subclass, how variable should be declared?
Protected
Private
Public
Static
- 7. Multiple Choice
If super class and subclass have same variable name, which keyword should be used to use super class?
super
this
upper
classname
- 8. Multiple Choice
Which inheritance in java programming is not supported
Multiple inheritance using classes
Multiple inheritance using interfaces
Multilevel inheritance
Single inheritance
- 9. Multiple Choice
If class B is subclassed from class A then which is the correct syntax
class B:A{}
class B extends A{}
class B extends class A{}
class B implements A{}
- 10. Multiple Choice
Order of execution of constructors in Java Inheritance is
Base to derived class
Derived to base class
Random order
none
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