Is the default class private or not? In Java, the default access modifier for a class is package-private, not private. This means that if you don't explicitly specify an access modifier (like public, private, or protected), the class will be accessible only within its own…

Why do we need to create a constructor? What is a Constructor? A constructor is a special method in a class that is automatically called when an instance (object) of that class is created. Its primary purpose is to initialize the newly created object by…

instances of a class mean? Instances of a class refer to specific objects created from that class. When you define a class in object-oriented programming, you are essentially creating a blueprint for objects. Each object created from that class is considered an instance. Key Points…

If both static and const fix a value, what is the difference between them? While both static and const (or final in Java) are used to define values that cannot change, they serve different purposes and have distinct characteristics. Let’s break them down: staticDefinition: The…

Can you explain interfaces What is an Interface? Definition: An interface is a contract or a blueprint in programming that defines a set of methods (functions) that a class must implement. However, an interface does not provide the actual implementation of these methods. Purpose: Interfaces…

Can you explain overloading and overriding in an easy way?OverloadingThink of it as having multiple versions of the same function or method.Key Idea: Same name, different parameters (like number or type).Example: Imagine a smartphone app that has a "send" button.If you click it with one…