latest interview questions on core java in java

Unicode is used for internal representation of characters and strings and it uses 16 bits to represent each other. Unicode is a standardized encoding system that assigns unique characters (including letters, numbers, symbols, and control characters) to every character in most of the world’s writing systems. It is designed to be a universal character set, … Read more

final : final keyword can be used for class, method and variables. A final class cannot be subclassed and it prevents other programmers from subclassing a secure class to invoke insecure methods. A final method can’t be overridden. A final variable can’t change from its initialized value. finalize() : finalize() method is used just before … Read more

public: Any thing declared as public can be accessed from anywhere. private: Any thing declared as private can’t be seen outside of its class. protected: Any thing declared as protected can be accessed by classes in the same package and subclasses in the other packages. default modifier : Can be accessed only to classes in … Read more

While defining method, variables passed in the method are called parameters. While using those methods, values passed to those variables are called arguments. In Java, the terms “argument” and “parameter” are often used interchangeably, but they have distinct meanings: Parameter: A parameter is a variable that is listed in the method declaration. It is a … Read more

An argument can be passed in two ways. They are passing by value and passing by reference. Passing by value: This method copies the value of an argument into the formal parameter of the subroutine. Passing by reference: In this method, a reference to an argument (not the value of the argument) is passed to … Read more