1- Is there a difference between the strength of an inductive argument and the strength of a deductive argument? Explain.
2-Sherlock Holmes often says he solves cases on the basis of deduction. When he concludes that some person, say Dr. Moriarty, is the murderer, does he draw that conclusion only on the basis of deductive reasoning? Explain.
3-What factors influence the strength of an inductive argument? Explain.
4-Internet web sites often conduct opinion surveys by allowing people to cast a vote while visiting a web page. Would the results be inductively strong or weak? Explain.
5-What is abduction? Explain.
6-Use Mendel's theory of genes to illustrate the difference between induction and abduction. Explain which his theory involves. Then indicate what kind of conclusion his theory would have come to if it had involved only the other.
7-If it makes some true predictions, is that enough to make an abductive inference strong? Explain.
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1. (10 pts) What are the diagrams defined in the UML Standard. Give a one or two sentence description of each one. 2. (10 pts) Given the following code, how should the toString methods in the classes H2ClassA and H2ClassB be written to give the indicated output and take advantage of the natural toString method in H2ClassB? 1 import java.util.ArrayList; 2 3 public class H2ClassA { 4 ArrayList <H2ClassB> list = new ArrayList <H2ClassB> (); 5 6 public static void main (String args []) { 7 H2ClassA y = new H2ClassA (); 8 int [] v = {4, 3, 7, 5, 99, 3}; 9 for (int m: v) 10 y.list.add (new H2ClassB (m)); 11 System.out.println (y); 12 } // end main 13 14 } // end class H2ClassA 15 16 class H2ClassB { 17 int x; 18 H2ClassB (int a) { x = a;} 19 } // end H2ClassB OUTPUT: 4 3 7 5 99 3 3. (10 pts) How can the following code be corrected? Give at least two good answers. 1 public class H2ClassC { 2 H2ClassC (int a) {} 3 } // end class H2ClassC 4 5 class H2ClassD extends H2ClassC{ 6 } // end class H2ClassD 4. (10 pts) Why does the following code give a compiler error? How should it be fixed?
1 public class H2ClassE { 2 int x, y, z; 3 4 H2ClassE (int a) { 5 x = a; 6 this (5, 12); 7 } 8 9 H2ClassE (int b, int c) { 10 y = b; 11 z = c; 12 } 13 } // end class H2ClassE 5. (10 pts) What is wrong with the following declaration? How should it be fixed? public static final int myNumber = 17.36; 6. (10 pts) What is wrong with the following code? How should it be fixed? 1 public class H2ClassG { 2 final int x; 3 4 H2ClassG () {} 5 H2ClassG (int a) {x = a;} 6 } // end class H2ClassG 7. (10 pts) What is wrong with the following code? How should it be fixed? 1 public class H2ClassH { 2 final int x; 3 4 int H2ClassH () { 5 if (x == 7) return 1; 6 return 2; 7 } // end 8 } // end class H2ClassH 8. (10 pts) What is wrong with the following code? x should be given a value of 24. What are two ways this can be legally accomplished? 1 public class H2ClassI { 2 final int x; 3 4 public static void main (String args []) { 5 H2ClassI h = new H2ClassI (); 6 h.x = 24; 7 } // end main 8 } // end class H2ClassI 9. (10 pts) What is wrong with the following code? Give two effective ways to fix it. 1 import javax.swing.*; 2 import java.awt.event.*; 3 4 public class H2ClassJ extends JFrame { 5 public static final long serialVersionUID = 22; 6 7 public H2ClassJ () { 8 addMouseListener (new MouseListener () { 9 public void mouseClicked (MouseEvent e) {} 10 }); 11 } // end constructor 12 13 } // end class H2ClassJ 10. (10 pts) Why does the following code give a compiler warning? (Use javac -Xlint) How should it be fixed? 1 import javax.swing.*; 2 3 public class H2ClassK { 4 String [] sa = {"a", "b", "c"}; 5 JComboBox jcbA = new JComboBox (sa); 6 } // end class H2ClassK |
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