java 16 interview questions and answers

A package statement must appear as the first line in a source code file (excluding blank lines and comments). In Java, the package statement must be the first statement in a Java source file, before any import statements or class declarations. The correct answer to the question about the restrictions on the location of a … Read more

Garbage collection does not guarantee that a program will not run out of memory. It is possible for programs to use up memory resources faster than they are garbage collected. It is also possible for programs to create objects that are not subject to garbage collection. No, garbage collection in Java does not guarantee that … Read more

Wrapped classes are classes that allow primitive types to be accessed as objects. In Core Java, wrapped classes refer to classes that encapsulate primitive data types within objects. The primary purpose of wrapped classes is to provide a way to use primitive data types as objects. This is often necessary in situations where objects are … Read more

The EventObject class and the EventListener interface support event processing. The sizeof operator is not a keyword. In Core Java, event handling is typically associated with the Abstract Window Toolkit (AWT) and Swing, which are part of the Java Foundation Classes (JFC). The primary classes and interfaces involved in event handling in Java are: java.util.EventObject: This is a common base class … Read more

When a task invokes its yield() method, it returns to the ready state. When a task invokes its sleep()method, it returns to the waiting state. In the context of multithreading in Java, yielding and sleeping are two different mechanisms used to manage thread execution. Here are the key differences between yielding and sleeping: Yielding: Purpose: The yield() method … Read more