Java - Sample Questions

What will be the output of the following Java program? class array_output { public static void main(String args[]) { char array_variable [] = new char[10]; for (int i = 0; i < 10; ++i) { array_variable[i] = 'i'; System.out.print(array_variable[i] + " " ); i++; } } }

What is the extension for code files of java ?

What is the range of byte data type in Java?

What is the range of short data type in Java?

Consider the following program and choose the correct answer: <pre><code> class MyThread extends Thread { public MyThread(String name) { this.setName(name); } @Override public void run() { try { sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } play(); } private void play() { System.out.print(getName()); System.out.print(getName()); } } public class ThreadTest { public static void main(String args[]) throws InterruptedException { Thread tableThread = new MyThread("Table"); Thread tennisThread = new MyThread("Tennis"); tableThread.start(); tennisThread.start(); } } </code></pre>

Consider the following program and predict the output: <pre><code> class MyThread implements Runnable { @Override public void run() { System.out.println(Thread.currentThread().getName()); } } public class ThreadTest { public static void main(String arg[]) { Thread thread = new Thread(new MyThread()); thread.run(); thread.run(); thread.start(); } } </code></pre>

What will be the output of the following Java program? class MainClass { public static void main(String args[]) { char a = 'A'; a++; System.out.print((int)a); } }

What is the limitation of toString() method of BigDecimal?