CMS Infosystems Senior Software Engineer Interview Questions and Answers

Polymorphism is the ability of an object to take on many forms.

• Polymorphism allows objects of different classes to be treated as if they are of the same class.

• It is achieved through method overriding and method overloading.

• Examples include function overloading, operator overloading, and inheritance.

• Polymorphism helps in achieving loose coupling and flexibility in code design.

Abstract class is a class that can have both abstract and non-abstract methods while an interface can only have abstract methods.

• Abstract class can have constructors while interface cannot

• A class can implement multiple interfaces but can only inherit from one abstract class

• Abstract class can have instance variables while interface cannot

• Abstract class can provide default implementation for some methods while interface ...read more

Custom exceptions can be created by extending the Exception class and defining the desired behavior.

• Create a new class that extends the Exception class

• Define the desired behavior for the exception

• Throw the custom exception when necessary