IT 212
Final Exam Review Question Answers

Part A: Multiple Choice

 1. a   2. c   3. a   4. c   5. b
 6. a   7. d   8. d   9. d  10. c
11. b  12. c  13. b  14. c

Part B: Predict output of Python code.

Problem 1:

Variable trace:
  i   b[i] c[i] a[b[i]][c[i]]
----+-----+----+---------------
  0    1     5   a[1][5] == "w"
  1    2     1   a[2][1] == "i"
  2    0     2   a[0][2] == "n"
  3    1     3   a[1][3] == "t"
  4    0     4   a[0][4] == "e"
  5    1     3   a[1][3] == "r"
  
Output: winter
 
Problem 2:

Output:
Staff Meeting Room 105 15 14:30
Poker Night Room 109 6/15/2018 20:30
Room 203
True
False
True
False

Part C: Convert traditional test to unit test.

from monthlyappointment import MonthlyAppointment
from onetimeappointment import OneTimeAppointment
import unittest

class MyUnitTestClass(unittest.TestCase):
        
    def test_1(self):
    
        appt1 = MonthlyAppointment("Staff Meeting", "Room 105", 15, 20, 30)
        appt2 = OneTimeAppointment("Poker Night", "Room 109", \
            2018, 6, 15, 20, 30)
        
        self.assertEqual(str(appt1), "Staff Meeting Room 105 15 14:30")
        self.assertEqual(str(appt2), "Poker Night Room 109 6/15/2018 20:30")
        appt1.location = "Room 203"
        self.assertEqual(appt.location, "Room 203")
        self.assertEqual(appt1.occurs_on(2018, 5, 15), True) 
        self.assertEqual(appt1.occurs_on(2018, 5, 17), False) 
        self.assertEqual(appt2.occurs_on(2018, 5, 15), True) 
        self.assertEqual(appt2.occurs_on(2018, 5, 17), False) 
)
        
if __name__ == '__main__':
    unittest.main( )
 
Part D: Find errors in Java programs.

// Problem 1. 
import java.util.Scanner;
public class Overtime
{
    public static void main(String[ ] args)
    {
        Scanner s = new Scanner(System.in);
        System.out.print("Enter the hours worked: ");
        double hours = Double.parseDouble(s.nextLine( ));
        System.out.print("Enter the hourly rate: ");
        double rate = Double.parseDouble(s.nextLine( ));
        double totalWages;
        if (hours > 40)
        {
            totalWages = (40.0 + (hours - 40.0) * 1.5) * rate;
        }
        else
        {
            totalWages = hours * rate;
        }
        System.out.println("Total Wages: " + totalWages); 
    }
}

// Problem 2.
import java.util.*;
public class Magic8Ball
{
    public static void main(String[ ] args)
    {
        // Instantiate random number generator
        Random ranGen = new Random( );
        
        // Choose random number in range [0, 6).
        int ansNum = ranGen.nextInt(6);

        // Choose response.
        String ans;
        if(ansNum == 0)
        {
            ans = "Yes -- definitely";
        }
        else if(ansNum == 1)
        {
            ans = "Most likely";
        }
        else if(ansNum == 2)
        {
            ans = "Reply hazy, try again";
        }
        else if(ansNum == 3)
        {
            ans = "Cannot predict now";
        }
        else if(ansNum == 4)
        {
            ans = "Don't count on it";
        }
        else
        {
            ans = "Very doubtful";
        }

        // Print answer.
        System.out.println("Magic eight ball answer: " + ans + ".");
    }
}