Polymorphism in Programming Principles: Method Overriding and Overloading

Question 1

Which of the following is NOT an advantage of polymorphism?

Accepted Answer

Simplified code compilation

Answer

Increased code flexibility

Answer

Improved code maintainability

Answer

Reduced code duplication

Question 2

Which of the following is the correct syntax for method overriding in Java?

Accepted Answer

@Override public void methodName() {}

Answer

public void overrideMethodName() {}

Answer

override void methodName() {}

Answer

override public void methodName() {}

Question 3

Which of the following is the correct syntax for method overloading in Python?

Accepted Answer

def methodName(arg1, arg2, *args):

Answer

def methodName(arg1, arg2):

Answer

def methodName(arg1, arg2, *, arg3):

Answer

def methodName(arg1, **kwargs):

Question 4

Which of the following is a valid example of method overriding?

Accepted Answer

class Child extends Parent { @Override public void display() { System.out.println("Child"); } }

Answer

class Parent { public void display() { System.out.println("Parent"); } }

Answer

class Child extends Parent { public void display(String a) { System.out.println("Child"); } }

Answer

class Parent { public void display(int a) { System.out.println("Parent"); } }

Question 5

Which of the following statements about polymorphism is true?

Accepted Answer

It enhances code reusability by allowing methods to have different implementations in subclasses.

Answer

It is a programming paradigm that uses inheritance to create new classes.

Answer

It allows variables to store objects of different types.

Answer

It is a technique for hiding data members of a class.

Question 6

Which of the following is NOT a benefit of polymorphism?

Accepted Answer

Reduced memory usage

Answer

Improved code readability

Answer

Reduced complexity

Answer

Increased flexibility

Question 7

What is the key difference between method overriding and method overloading in Java?

Accepted Answer

Overriding involves changing the implementation of an inherited method, while overloading involves providing multiple implementations of a method in the same class.

Answer

Overloading involves changing the implementation of an inherited method, while overriding involves providing multiple implementations of a method in the same class.

Answer

Both overriding and overloading involve changing the method signature.

Answer

Overriding and overloading are synonymous terms in Java.

Question 8

What is the purpose of the @Override annotation in Java?

Accepted Answer

To indicate that a method is overriding a method in a superclass, ensuring type safety.

Answer

To indicate that a method is overloading a method in the same class.

Answer

To prevent a method from being overridden in a subclass.

Answer

To specify the return type of a method.

Question 9

Which of the following programming languages does NOT fully support polymorphism?

Accepted Answer

COBOL

Answer

Java

Answer

C++

Answer

Python

Question 10

Which of the following is NOT a benefit of polymorphism?

Accepted Answer

Reduced memory usage

Answer

Increased code reusability

Answer

Improved extensibility

Answer

Enhanced code readability

Question 11

What is the process of defining a method in a subclass with the same name and signature as a method in its superclass called?

Accepted Answer

Method overriding

Answer

Method implementation

Answer

Method inheriting

Answer

Method extending

Question 12

What is the name of the technique that allows objects of different classes to be treated as objects of a common superclass?

Accepted Answer

Polymorphism

Answer

Object-oriented programming

Answer

Encapsulation

Answer

Inheritance

Question 13

Which of the following is NOT a good practice when designing polymorphic code?

Accepted Answer

Allow for multiple inheritance

Answer

Use a clear and consistent naming convention

Answer

Avoid unnecessary casting

Answer

Document polymorphic methods thoroughly

Question 14

Which of the following features allows methods to have the same name but different parameters?

Accepted Answer

Method overloading

Answer

Method overriding

Answer

Polymorphism

Answer

Encapsulation

Question 15

What is the term for a method that is implemented in a subclass with different behavior than in the superclass?

Accepted Answer

Overridden method

Answer

Overloaded method

Answer

Polymorphic method

Answer

Abstract method

Question 16

Which of the following is a disadvantage of polymorphism?

Accepted Answer

Increased code complexity

Answer

Increased code readability

Answer

Extensibility

Answer

Reduced coupling

Question 17

What is the key difference between method overriding and method overloading?

Accepted Answer

Different method signatures

Answer

Different parameter types

Answer

Different method bodies

Answer

Different return types

Question 18

Which of the following statements about polymorphism is true?

Accepted Answer

It enables code reuse and flexibility.

Answer

It is only applicable to classes.

Answer

It always increases the complexity of the code.

Answer

It cannot be implemented in Java.

Question 19

What is the purpose of the `@Override` annotation in Java?

Accepted Answer

To indicate that a method is overriding a method in the superclass

Answer

To prevent a method from being overridden

Answer

To mark a method as abstract

Answer

To specify the return type of a method

Question 20

Method overriding refers to:

Accepted Answer

Redefining a method in a subclass with the same name, parameters, and return type as the overridden method in the superclass

Answer

Calling a method from a different class

Answer

Changing the parameters of a method in a subclass

Answer

Hiding a method in a subclass

Question 21

Method overloading involves:

Accepted Answer

Having multiple methods with the same name but different parameters or return types in the same class

Answer

Redefining a method in a subclass

Answer

Hiding a method in a subclass

Question 22

Which of the following is **not** an advantage of polymorphism?

Accepted Answer

Eliminates the need for inheritance

Answer

Promotes code reuse and flexibility

Answer

Improves code readability

Answer

Reduces the need for conditional statements

Question 23

A potential disadvantage of polymorphism is:

Accepted Answer

It can increase the complexity of code and make it harder to track the behavior of objects at runtime

Answer

It requires a deep understanding of object-oriented programming

Answer

It can slow down program execution

Question 24

Which of the following is an example of method overriding?

Accepted Answer

class Dog extends Animal { public void bark() {...} }

Answer

class Animal { public void sleep() {...} }

Answer

interface Animal { public void eat(); }

Question 25

Which of the following is an example of method overloading?

Accepted Answer

class Calculator { public int add(int a, int b) {...} public double add(double a, double b) {...} }

Answer

class Shape { public void draw() {...} }

Question 26

Polymorphism enables:

Accepted Answer

Treating objects as instances of their superclass or subclasses, allowing for uniform treatment of objects in a hierarchy

Answer

Only superclasses to be treated as their subclasses

Answer

Only subclasses to be treated as their superclass

Question 27

A potential challenge associated with polymorphism is:

Accepted Answer

It can be difficult to track the behavior of objects at runtime due to dynamic method resolution

Answer

It is not supported by all programming languages

Answer

It can lead to compile-time errors