Where is the Blue Danube River located?
Vienna
Can you swim in the Danube?
It is permissible to swim in the Bratislava Danube only in the river branches, since all the river banks in the capital are actually part of the local public port. Swimming in the port is strictly prohibited due to safety reasons, according to Martin Kontúr, spokesperson of the Verejné Prístavy public ports company.
What is the difference between static and global variables?
Global variables are stored in Data Segment of process. Global variable’s life is until the life of program and it can be accessed by other files using extern keyword. Static variables are initialized only once at the time of declaration only. Static variables are not accessible by other files using extern keywords.
What is the difference between static and non static variables?
Static variables reduce the amount of memory used by a program. Static variables are shared among all instances of a class. Non static variables are specific to that instance of a class. Non static variable is like a local variable and they can be accessed through only instance of a class.
Why we Cannot override static method?
Overloading is the mechanism of binding the method call with the method body dynamically based on the parameters passed to the method call. Static methods are bonded at compile time using static binding. Therefore, we cannot override static methods in Java.
Can you override static method?
We can declare static methods with the same signature in the subclass, but it is not considered overriding as there won’t be any run-time polymorphism. Hence the answer is ‘No’.
Which method we Cannot be override?
No, we cannot override static methods because method overriding is based on dynamic binding at runtime and the static methods are bonded using static binding at compile time. So, we cannot override static methods. The calling of method depends upon the type of object that calls the static method.
Can you use this () and super () both in a constructor?
both this() and super() can not be used together in constructor. this() is used to call default constructor of same class.it should be first statement inside constructor. super() is used to call default constructor of base class.it should be first statement inside constructor.
What is this () and super ()?
super() as well as this() both are used to make constructor calls. super() is used to call Base class’s constructor(i.e, Parent’s class) while this() is used to call current class’s constructor. Let’s see both of them in detail: super() super() is use to call Base class’s(Parent class’s) constructor.
Why static variables are bad?
Static variables are generally considered bad because they represent global state and are therefore much more difficult to reason about. In particular, they break the assumptions of object-oriented programming.
Can a constructor be final?
Constructors are used to initialize an object. It is syntactically similar to a method but it has the same name as its class and a constructor does not have a return type. Java constructor can not be final. One of the important property of java constructor is that it can not be final.
Why constructor is not overridden?
Constructor Overriding is never possible in Java. This is because, Constructor looks like a method but name should be as class name and no return value. Overriding means what we have declared in Super class, that exactly we have to declare in Sub class it is called Overriding.
Can we declare constructor as private?
Yes. Class can have private constructor. Even abstract class can have private constructor. By making constructor private, we prevent the class from being instantiated as well as subclassing of that class.