The concept of derived classes is involved in _________.

Related MCQs

• Given the following code:~~~class Base { int x = 10; }~~~class Derived extends Base~~~{ int x = 20; }~~~Base b = new Base();~~~Derived d = new Derived ( );~~~Base bd = new Derived(); The statement~~~System.out.println(b.x + " " + d.x + " " + bd.x);~~~will produce the output
• State true or false (i) JPanel is a class included in awt package (ii) Anonymous classes are mostly used for event handling (iii) Names of anonymous classes must be unique (iv) JOptionPane is an inner class
• The classes Reader and Writer are derived from the class _________.
• The concept of multiple inheritance is implemented in Java by ____ (i.) extending two or more classes (ii.) extending one class and implementing one or more interfaces (iii.) implementing two or more interfaces (iv.) all of these
• Which of the following package stores all the standard java classes? a) jav
• Which of these classes is related to all the exceptions that can be caught by using catch?
• Which of these classes is related to all the exceptions that cannot be caught?
• Which is the super class of all exception classes
• Which class is the super class of all classes of the java.lang package?
• Which of these classes is used to read characters and strings in Java from console?