Question

(TCO 1) The JVM executes a Java application by (Points : 6)

       executing the public static main method of the class.
       creating an object of the class and executing that object’s main method.
       executing the class constructor.
       compiling the Java code into byte code.

(TCO 1) Which method call converts the value in variable stringVariable to a double? (Points : 6)        Double.parseDouble( stringVariable );        Convert.toDouble( stringVariable );        Convert.parseDouble( stringVariable );        Float.parseFloat( stringVariable ); (TCO 1) Which of the following can be used to get a double value from the keyboard? (Points : 6)        Formatter input = new Formatter(System.in); double value = input.nextDouble( );        Scanner input = new Scanner(System.out); double value = input.nextDouble( );        Formatter input = new Formatter(System.out); double value = input.nextDouble( );        Scanner input = new Scanner(System.in); double value = input.nextDouble( ); (TCO 1) If a user inputs 12.34 into the dialog box displayed by the showInputDialog method of the JOptionPane class, what type of value will be returned from that method? (Points : 6)        A double value        A string value        A float value        It depends on what type of value the user was told to input. (TCO 1) What do the following statements do?             int array[ ] = {1,2,3,4,5};             int len = array.length; (Points : 6)        Creates an integer array containing 5 elements.        Initializes the array elements to the listed values.        Stores the number of elements in the array in the len variable.        All of the above. (TCO 2) Variables should be declared as local variables of a method if (Points : 6)        they are used as arguments to other methods of the class.        their values are only used by the method.        their values must be shared between different methods of the class.        they are method parameters. (TCO 2) What is a primary difference between inheritance in Java and inheritance in C++? (Points : 6)        C++ permits derived classes to execute base class constructors, Java does not.        Inheritance in Java is protected, whereas in C++ it can be public, private, or protected.        C++ permits inheritance from multiple classes, Java does not.        Java allows multiple inheritance, C++ does not. . (TCO 3) What can you say about the following Java class?             public class MyApp extends JFrame { … } (Points : 6)        MyApp will contain a JFrame object which provides the display window.        MyApp inherits from JFrame, so it is a customized window.        MyApp will access JFrame methods by doing objectName.methodName(….).        MyApp will need to override JFrame methods to display buttons in the window