gs gs111 Types of Classes (Using Java) - Derived Class - Quiz No.1
gs gs111 OOP Object Oriented Programming Java Quiz
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Question 1: What will be the output of the following Java code?
class one { public void print1() { System.out.println("Hello"); } } class two extends one { public void print2() { System.out.println("World"); } } class Main { public static void main(String[] args) { two g = new two(); g.print2(); g.print1(); } } World HelloHello World
Compilation Error
World World Hello
Question 2: What will be the output of the following Java code?
class Super { public void pfunc() { System.out.println("Parent function"); } } class Sub extends Super { public void cfunc() { System.out.println("Child function"); } public static void main(String[] args) { Sub obj = new Sub(); obj.cfunc(); obj.pfunc(); } } Child function Parent functionParent function Child function
Compilation error
Child function
Question 3: What will be the output of the following Java code?
class Pulsar { String name; } class Bike extends Pulsar { String modelType; public void showDetail() { name = "Pulsar 2.0"; modelType = "Sports"; System.out.println(name); } public static void main(String[] args) { Bike car = new Bike(); car.showDetail(); } }
Compilation error
Sports
Pulsar 2.0
Pulsar 2.0 Sports
Question 4: What will be the output of the following Java code?
class Base { String name="base"; } class Derived extends Base { String name; public void details() { name = "Derived"; System.out.println(super.name+" and "+name); } public static void main(String[] args) { Derived obj = new Derived(); obj.details(); } }
Derived and base
base and Derived
base and
Derived and
Question 5: What will be the output of the following Java code?
class Person { public void show() { System.out.println("None"); } } class College extends Person { public void show1() { System.out.println("I am in a College"); } } class School extends Person { public void show2() { System.out.println("I am in a School"); } } class University extends Person { public void show3() { System.out.println("I am in a University"); } } class HierarchicalInheritance { public static void main(String args[]) { School teacher = new School(); College student = new College(); University doctor = new University(); student.show(); student.show1(); teacher.show2(); doctor.show3(); } } None I am in a College I am in a School I am in a University
Compilation error
I am in a University I am in a School I am in a College None
None
Question 6: What will be the output of the following Java code?
class Base { void msg() { System.out.println("Hello"); } } class Intermediate { void msg() { System.out.println("Welcome"); } } class Derived extends Base,Intermediate { public static void main(String args[]) { C obj=new C(); obj.msg(); } } Hello WelcomeWelcome Hello
Compilation error
Hello
Question 7: What will be the output of the following Java code?
class one { public void print_one() { System.out.print("one"); } } class two extends one { public void print_two() { System.out.print("two"); } public void print_one() { System.out.print("three"); } } class three extends two { public static void main(String[] args) { three obj = new three(); obj.print_one(); obj.print_two(); obj.print_one(); } }
one two one
two three three
three two three
two three one
Question 8: What will be the output of the following Java code?
class Line { public void print() { System.out.println("Inside display"); } } class Rectangle extends Line { public void area() { System.out.println("Inside area"); } } class Square extends Rectangle { public void volume() { System.out.println("Inside volume"); } } class Main { public static void main(String[] arguments) { Square obj = new Square(); obj.print(); } }
Inside display
Inside area
Inside volume
Compilation error
Question 10: What will be the output of the following Java code?
class Method1 { void fun() { System.out.println("Parent1"); } } class Method2 { void fun() { System.out.println("Parent2"); } } class Test extends Method1, Method2 { public static void main(String args[]) { Test t = new Test(); t.fun(); } }
Compilation error
Parent1
Parent2
Parent1 Parent2
