Overriding And Overloading — Part 1 MCQs with Explanations

In Java, private methods of a superclass are not accessible outside that class , including its subclasses. Since a subclass cannot see a private method of its superclass, it cannot override it. Even if a subclass declares a method with the same name and signature, it is treated as a new method , not an overridden one. Option A states a general rule but Option D gives the precise reason for why overriding is not possible. Therefore, the correct answer is Option D – No, private methods are not visible to subclasses .

Method overloading occurs when two or more methods in the same class (or subclass and superclass) have the same name but different parameter lists. In Java, a subclass can overload a method from its superclass by defining a method with the same name but a different parameter list. Option A is incorrect because a method marked as private in the superclass is not visible to the subclass, so it cannot be directly overloaded. Option B and C are incorrect because method overloading is a fundamental feature of Java and is fully supported. Therefore, the correct answer is Option D: None of These since none of the given options correctly describe method overloading in Java.

Overriding in Java simply means that the particular method would be called based on the run time type of the object and not on the compile time type. But in the above case the methods are static which means access to them is always resolved during compile time only using the compile time type information. Accessing them using object references is just an extra liberty given by the designers of Java.

If you create object of subclass with reference of super class like ( A a = new B();) then subclass method and super class variable will be executed.

Class B extended Class A therefore all methods of Class A will be available to class B except private methods. Class C extended Class A therefore all methods of Class A will be available to class C except private methods.

You can not override private method , private method is not availabe in subclass . In this case printName() method a class A is not overriding by printName() method of class B. printName() method of class B different method. So you can call printName() method of class B.

Defining multiple methods with the same name but different parameters is the correct answer to “What is the purpose of method overloading in Java”. This question is standard in competitive examination syllabi for Overriding And Overloading.

@Override is the correct answer to “In method overriding, which keyword is used in the child class to indicate that a method is intended to override a superclass method”. This question is standard in competitive examination syllabi for Overriding And Overloading.

It results in a compilation error is the correct answer to “What happens when a subclass tries to override a final method from the superclass in Java”. This question is standard in competitive examination syllabi for Overriding And Overloading.

The number or type of parameters is the correct answer to “In method overloading, what must be different between the overloaded methods in the same class”. This question is standard in competitive examination syllabi for Overriding And Overloading.

The superclass method is the correct answer to “Which method is called during method overriding in Java if the superclass method is invoked using the "super" keyword”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Child is the correct answer to “What is the result of the following code snippet? class Parent { void display() { System.out.println("Parent"); } } class Child extends Parent { void display() { System.out.println("Child"); } } public class Main { public static void main(String[] args) { Parent obj = new Child(); obj.display(); } }”. This question is standard in competitive examination syllabi for Overriding And Overloading.

void is the correct answer to “In Java, what is the return type of a method that does not return any value”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Method overloading involves multiple methods with the same name in the same class, while method overriding involves redefining a superclass method in a subclass is the correct answer to “What is the difference between method overloading and method overriding in Java”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Yes, it must be the same is the correct answer to “In method overriding, is it mandatory for the return type of the subclass method to be the same as the superclass method”. This question is standard in competitive examination syllabi for Overriding And Overloading.

To call the superclass method is the correct answer to “What is the purpose of the "super" keyword in method overriding”. This question is standard in competitive examination syllabi for Overriding And Overloading.

To indicate that a method is intended to override a superclass method is the correct answer to “What is the purpose of the "@Override" annotation in Java”. This question is standard in competitive examination syllabi for Overriding And Overloading.

No, it is not allowed is the correct answer to “In method overloading, can methods have the same name and the same parameter types if their return types are different”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Yes, as long as the method names are the same is the correct answer to “Can a method be both overloaded and overridden in the same class in Java”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Yes, it is allowed is the correct answer to “In method overloading, can methods have the same name and the same return type if their parameter types are different”. This question is standard in competitive examination syllabi for Overriding And Overloading.

To call the superclass constructor is the correct answer to “What is the purpose of the "super" keyword in method overloading”. This question is standard in competitive examination syllabi for Overriding And Overloading.

No, the return type cannot be changed is the correct answer to “In Java, can a method be overloaded by changing only the return type”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Creating a static method with the same name as a superclass method is the correct answer to “What is the purpose of method hiding in Java”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Yes, it must be the same is the correct answer to “In method overriding, is it mandatory for the method name in the subclass to be the same as the method name in the superclass”. This question is standard in competitive examination syllabi for Overriding And Overloading.

It results in a compilation error is the correct answer to “What happens when a subclass tries to override a static method from the superclass in Java”. This question is standard in competitive examination syllabi for Overriding And Overloading.

No, it is not allowed is the correct answer to “In method overloading, can methods have the same name and the same parameter types if their access modifiers are different”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Redefining a superclass method in a subclass to provide a specific implementation is the correct answer to “What is the purpose of method overriding in Java”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Yes, as long as it's in the same package is the correct answer to “In Java, can a subclass override a protected method from its superclass”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Compilation Error is the correct answer to “What is output of the program? class Test{ public void display(int x, double y){ System.out.println(x+y); } public double display(int p, double q){ return (p+q); } public static void main(String args[]){ Test test = new Test(); test.display(4, 5.0); System.out.println(test.display(4, 5.0)); } }”. This question is standard in competitive examination syllabi for Overriding And Overloading.

I am a Student is the correct answer to “what is the result of the following piece of code: public class Person{ public void talk(){ System.out.print("I am a Person"); } } public class Student extends Person{ public void talk(){ System.out.print("I am a Student"); } } public class Test{ public static void main(String args[]){ Person p = new Student(); p.talk(); } }”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Will compile and run printing out 20 is the correct answer to “What will be the output of the following program code? class Rectangle{ public int area(int length, int width){ return length*width; } } class Square extends Rectangle{ public int area(long length, long width){ return (int) Math.pow(length, 2); } } public class Test{ public static void main(String args[]){ Square r = new Square(); System.out.println(r.area(5 , 4)); } }”. This question is standard in competitive examination syllabi for Overriding And Overloading.

final is the correct answer to “____________ method cannot be overridden.”. This question is standard in competitive examination syllabi for Overriding And Overloading.

final is the correct answer to “Which of these keywords can be used to prevent Method overriding”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Compilation Error is the correct answer to “What will be the output of the following Java program? final class A { int i; } class B extends A { int j; System.out.println(j + " " + i); } class inheritance { public static void main(String args[]) { B obj = new B(); obj.display(); } }”. This question is standard in competitive examination syllabi for Overriding And Overloading.

7 is the correct answer to “What will be the output of the following Java program? class Alligator { public static void main(String[] args) { int []x[] = {{1,2}, {3,4,5}, {6,7,8,9}}; int [][]y = x; System.out.println(y[2][1]); } }”. This question is standard in competitive examination syllabi for Overriding And Overloading.

8 is the correct answer to “What will be the output of the following Java code? class overload { int x; int y; void add(int a) { x = a + 1; } void add(int a , int b) { x = a + 2; } } class Overload_methods { public static void main(String args[]) { overload obj = new overload(); int a = 0; obj.add(6, 7); System.out.println(obj.x); } }”. This question is standard in competitive examination syllabi for Overriding And Overloading.

Method overriding is the correct answer to “What is the process of defining a method in a subclass having same name & type signature as a method in its superclass”. This question is standard in competitive examination syllabi for Overriding And Overloading.

compile time error is the correct answer to “What will be the output of the following Java code? class A { public void m1 (int i,float f) { System.out.println(" int float method"); } public void m1(float f,int i); { System.out.println("float int method"); } public static void main(String[]args) { A a=new A(); a.m1(20,20); } }”. This question is standard in competitive examination syllabi for Overriding And Overloading.

super() is the correct answer to “Which of these is correct way of calling a constructor having no parameters, of superclass A by subclass B”. This question is standard in competitive examination syllabi for Overriding And Overloading.

method overloading is the correct answer to “What is the process of defining two or more methods within same class that have same name but different parameters declaration”. This question is standard in competitive examination syllabi for Overriding And Overloading.