Inheritance
Authored by Jeevitha P
Computers
University
Used 309+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which of this keyword must be used to inherit a class?
super
this
extends
extent
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A class member declared protected becomes a member of subclass of which type?
public member
private member
protected member
static member
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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 QUESTION
1 min • 1 pt
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 QUESTION
45 sec • 1 pt
Using which of the following, multiple inheritance in Java can be implemented?
Interfaces
Multithreading
Protected methods
Private methods
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
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 QUESTION
45 sec • 1 pt
If super class and subclass have same variable name, which keyword should be used to use super class?
super
this
upper
classname
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