java 16 interview questions and answers

A task’s priority is an integer value that identifies the relative order in which it should be executed with respect to other tasks. The scheduler attempts to schedule higher priority tasks before lower priority tasks. In the context of Core Java and multithreading, a task’s priority refers to the priority assigned to a thread or … Read more

The CheckboxMenuItem class extends the MenuItem class to support a menu item that may be checked or unchecked. In Core Java, MenuItem and CheckboxMenuItem are both classes that belong to the AWT (Abstract Window Toolkit) package, which is used for creating graphical user interfaces in Java. Here’s the difference between the two: MenuItem: MenuItem represents a simple item in … Read more

If a checked exception may be thrown within the body of a method, the method must either catch the exception or declare it in its throws clause. The “catch or declare” rule is associated with checked exceptions in Java. According to this rule, if a method may throw a checked exception, the method must either … Read more

The default value of an String type is null. In Java, variables of the String type are automatically initialized to null. This means that if you declare a String variable but don’t explicitly assign a value to it, it will have the default value of null. Here’s an example: java public class Example { public static void main(String[] … Read more

A thread enters the waiting state when it blocks on I/O. In Java, when a thread blocks on I/O (Input/Output) operations, it enters the “BLOCKED” state. The “BLOCKED” state indicates that the thread is waiting for a monitor lock to enter or re-enter a synchronized block/method or waiting for some resource to become available. It’s … Read more