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There are five classes class 1, class 2, class 3, class 4 and class 5 in a school. They are one above the other. Class 1 is at the bottom, then class 2 above it and so on. Five videos M1, M2, M3, M4 and M5 are displayed in these given classes. Only one video is displayed in a particular class. Each video is displayed only one time. Video M5 is displayed at an even numbered class. Video M2 is displayed at class 1. Video M1 is displayed at the class just below M5. Video M4 is not displayed at even numbered class. Which of the following statement is not correct?
Determine output of the following code. interface A { } class C { } class D extends C { } class B extends D implements A { } public class Test extends Thread{ public static void main(String[] args){ B b = new B(); if (b instanceof A) System.out.println("b is an instance of A"); if (b instanceof C) System.out.println("b is an instance of C"); } }
Which two classes use the Shape class correctly?
A. public class Circle implements Shape { private int radius; }B. public abstract class Circle extends Shape { private int radius; }C. public class Circle extends Shape { private int radius; public void draw(); }D. public abstract class Circle implements Shape { private int radius; public void draw(); }E. public class Circle extends Shape { private int radius; public void draw() { /* code here */ } }F. public abstract class Circle implements Shape { private int radius; public void draw() { /* code here */ } }
Which of the following is/are true for an abstract class? i) Abstract classes in PHP are declared with the help of abstract keyword. ii) A class is declare abstract by using the keyword implements. iii) It is a class that really isn’t supposed to ever be instantiated but instead serves as a base class. iv) Attempting to instantiate an abstract class results in an error. 
interface Base{ boolean m1 (); byte m2(short s);}

which two code fragments will compile?
1. interface Base2 implements Base {}2. abstract class Class2 extends Base { public boolean m1(){ return true; }}3. abstract class Class2 implements Base {}4. abstract class Class2 implements Base { public boolean m1(){ return (7 > 4); }}5. abstract class Class2 implements Base { protected boolean m1(){ return (5 > 7) }}
What is the Message is displayed in the applet made by the following Java program?
import java.awt.*;import java.applet.*;public class myapplet extends Applet{ public void paint(Graphics g) { g.drawString("A Simple Applet", 20, 20); }}
What is the length of the application box made by the following Java program?
import java.awt.*;import java.applet.*;public class myapplet extends Applet{ public void paint(Graphics g) { g.drawString("A Simple Applet", 20, 20); }}
What is the length of the application box made the following Java program?
import java.awt.*;import java.applet.*;public class myapplet extends Applet{ Graphic g; g.drawString("A Simple Applet", 20, 20); }
What is the length of the application box made in the following Java program?
import java.awt.*;import java.applet.*;public class myapplet extends Applet { Graphic g; g.drawString("A Simple Applet",20,20); }
What is the length of the application box made in the following Java program?
import java.awt.*;import java.applet.*;public class myapplet extends Applet{ Graphic g; g.drawString("A Simple Applet",20,20); }