latest interview questions on core java in java

An interface may be declared as public or abstract In Core Java, an interface declaration can have the following modifiers: public: An interface can be declared as public, which means it can be accessed from other packages. abstract: Interfaces are implicitly abstract; you don’t need to use the abstract keyword explicitly. However, if you do use it, it … Read more

During compilation, the values of each case of a switch statement must evaluate to a value that can be promoted to an int value. In Java, there are certain restrictions on the values that can be used in each case of a switch statement. Here are the key points: Must be a Constant Expression: The values used in each … Read more

An event-listener interface defines the methods that must be implemented by an event handler for a particular kind of event. An event adapter provides a default implementation of an event-listener interface. In Java, event-listener interfaces and event-adapter classes are related to handling events in graphical user interface (GUI) programming. Here’s the explanation: Event-Listener Interface: An … Read more

The String literal “abc” is not a primitive value. It is a String object. No, “abc” is not a primitive value in the context of Core Java. In Java, primitive data types include int, float, double, char, boolean, byte, short, and long. These types represent simple values, and they are not objects. On the other hand, “abc” is a … Read more

When a window is repainted by the AWT painting thread, it sets the clipping regions to the area of the window that requires repainting. In the context of Core Java and graphical user interfaces (GUIs), clipping and repainting are related concepts that involve rendering and updating graphical elements on the screen. Clipping: Clipping refers to … Read more