Solutions for the Sample Exam 3 - CS 303e

1. this

2. (s.length() == 1) && Character.isLetter(s.charAt(0))

3. we didn't cover command line arguments.

4. s instanceof Square

5. str.indexOf("great") >= 0

6. A method name is overloaded if there are two or more methods which have that same name but different parameter lists.

7. Random gen = new Random();
int ranNum = gen.nextInt(myStrings.length);
System.out.print(myStrings[ranNum]);

8. Scanner scan = new Scanner(System.in);
int[] nums = new int[10];
for(int i = 0; i < 10; i++)
	nums[i] = scan.nextInt();

9. We went over this example in class.

10. 
public int[] workStrings(String[] stringArray)
{
  int[] arr = new int[2];
  int countLower = 0;
  int countDigit = 0;
  for(int i = 0; i < stringArray.length; i++)
  {
    char first = stringArray[i].charAt(0);
    if(Character.isLetter(first) && Character.isLowerCase(first))
      countLower++;

    char last = stringArray[i].charAt(stringArray[i].length-1);
    if(Character.isDigit(last)) countDigit++;
  }
  arr[0] = countLower;
  arr[1] = countDigit;
  return arr;
}

11. 
public class DictionaryEntry
{
  private String word;
  private String definition;
  
  public String getWord()
  {
    return word;
  }

  public String getDefinition()
  {
    return definition;
  }

  public void setWord(String newWord)
  {
    word = newWord;
  }

  public void setDefinition(String def)
  {
    definition = def;
  }

  public DictionaryEntry(String word, String definition)
  {
    this.word = word;
    this.definition = definition;
  }

  public String toString()
  {
    return "DictionaryEntry[word = " + word + ", definition = " + definition +
        "]";
  }

  public Object clone()
  {
    DictionaryEntry newEn = new DictionaryEntry(word, definition);
    return newEn;
  }

  public boolean equals(Object other)
  {
    if(other == null) return false;
    if(other instanceof DictionaryEntry)
    {
      DictionaryEntry d = (DictionaryEntry) other;
      return (word.equals(d.word) && definition.equalsIgnoreCase(d.definition));
    }
    return false;
  }
}