latest interview questions on core java in java

The compiler supplies a default constructor for a class if no other constructors are provided. In Java, a default constructor is provided by the compiler under certain circumstances. The compiler automatically supplies a default constructor for a class under the following conditions: No Constructors Defined: If you haven’t defined any constructor for your class, the … Read more

The operating system’s task scheduler allocates execution time to multiple tasks. By quickly switching between executing tasks, it creates the impression that tasks execute sequentially. In a computer with a single CPU, multithreading is achieved through time-sharing or time-slicing. The operating system allocates time slices to each thread, allowing them to execute in a seemingly … Read more

The abs() method is used to calculate absolute values. In Core Java, the Math.abs() method is used to calculate the absolute value of a number. The abs() method returns the absolute value of its argument, which is the distance of the argument from zero. Here’s an example: java public class AbsoluteValueExample { public static void main(String[] args) … Read more

Yes, an exception can be rethrown. Yes, in Java, an exception can be rethrown. When a catch block catches an exception, it has the option to handle the exception locally or to rethrow it. If the catch block decides to rethrow the exception, it means that it doesn’t handle the exception itself, but instead, it … Read more

The File class is used to create objects that provide access to the files and directories of a local file system. The File class in Java is used to represent the information about files and directories. It does not provide the methods to perform file operations directly but is a part of the java.io package and provides … Read more