Math.pow(3,3) returns

Which of the following is not an advantage of using methods.

You should fill in the blank in the following code with ______________.

public class Test {
    public static void main(String[] args) {
        System.out.print("The grade is " + getGrade(78.5));
        System.out.print("\nThe grade is " + getGrade(59.5));
    }

    public static _________ getGrade(double score) {
        if (score >= 90.0)
            return 'A';
        else if (score >= 80.0)
            return 'B';
        else if (score >= 70.0)
            return 'C';
        else if (score >= 60.0)
            return 'D';
        else
            return 'F';
    }
}

Analyze the following code:

class Test {
    public static void main(String[] args) {
        System.out.println(xMethod((double)5));
    }

    public static int xMethod(int n) {
        System.out.println("int");
        return n;
    }

    public static long xMethod(String n) {
        System.out.println("long");
        return n;
    }
}
What is the output of this program?

Analyze the following code.

public class Test {
    public static void main(String[] args)  {
        System.out.println(m(2)); 
    }

    public static int m(int num) {
        return num;
    }
   
    public static void m(int num) {
        System.out.println(num);
    }
}

Analyze the following code:

class Test {
    public static void main(String[] args) {
        System.out.println(xmethod(5));
    }

    public static int xmethod(int n, long t) {
        System.out.println("int");
        return n;
    }

    public static long xmethod(long n) {
        System.out.println("long");
        return n;
    }
}

Variables defined in the method header are called _____.

Suppose your method does not return any value, which of the following keywords can be used as a return type?

The following program find the lowest integer in an array of integers.  You want to save the lowest value in an integer variable called low.  You can assume the array nums hold a variety of integer values.  Examine the following code:

<low variable declaration>

for (int x =0; x < nums.length; x++)
  {
    if (nums[x] < low)   low = nums[x];
  }

Which of the following is the best way to declare the low variable?

Which of the following code segments will reverse the direction of a GridWorld Actor object?

Which term refers to using methods of the same name, but different parameters?

Which of the five methods called by the Critter act( ) method would you override if you wanted to change possible locations to which the critter could move?

How does a ChameleonCritter decide which color to change to?

Which built-in ArrayList method will change an existing object in the ArrayList without changing its index? 

What does this statement output?
String s1 = “Mississippi”;
System.out.println(s1.indexOf(“ssi”));

Which of the following outputs the size of the String str?

Which of the following is not a primitive data type?

Which of the following will tell you the number of columns in a 2D array called matrix?

what does the following code do, assuming nums is an array of integers?

int x=0;
for(int i=nums.length; i >= 0; i--)      x += nums[i];
System.out.println(x);

Consider the method
public String mystery(String s)
{
     String s1 = s.substring(0,1);
     String s2 = s.substring(1, s.length() - 1);
     String s3 = s.substring(s.length() - 1);
     if (s.length() <= 3)
          return s3 + s2 + s1;
     else
          return s1 + mystery(s2) + s3;
}

What is the output of

System.out.println(mystery("DELIVER"));

public interface InterfaceA { void methodA(); }

public interface InterfaceB extends InterfaceA { void methodB(); }

public class ClassA implements InterfaceA
{
     public void methodA() {}
     public void methodB() {}
}

public class ClassB extends ClassA implements InterfaceB
{
     public ClassB() {}
     ... <methods not shown>
}

What is the minimum number of methods that must be defined in classB for it to compile with no errors?

int n = 2005;
for (int i = 0; i < 50; i++)
     n = (n + 3) / 2;

What is the value of n after the for loop ends?

twist is defined as follows:
public void twist(String[] w)
{
     String temp = w[0].substring(0, 1);
     w[0] = w[1].substring(0, 1) + w[0].substring(1);
     w[1] = temp + w[1].substring(1);
}

What is the output of the following code segment?

String[] words = {"HOW", "NEAT"};
twist(words):
System.out.println(words[0] + " " + words[1]);

      If Crossword extends Puzzle and implements Solvable, and:

Puzzle p = new Puzzle();
Crossword cw = new Crossword(10, 20);

are declared, which of the following statements will cause a syntax error?

What is the output of the following code?
String barb = "BARBARA";
scramble(barb);
System.out.println(barb);

The method scramble is defined as follows:
public String scramble(String str)
{
     if (str.length() >= 2)
     {
          int n = str.length() / 2;
          str = scramble(str.substring(n)) + str.substring(0, n);
     }
     return str;
}

What are the values in arr after the following statements are executed?
int[] arr = {1, 1, 0, 0, 0};

for (int i = 2; i < arr.length; i++)
     arr[i] = arr[i-1] + arr[i-2];

What is the output of the following code?
List nums = new ArrayList(3);
nums.add(New Integer(1));
nums.add(New Integer(2));
nums.add(0, nums.get(1));

Object x = nums.get(0);
Object y = nums.get(2);

if (x == y)
     System.out.println(x + " is equal to " + y);
else
     System.out.println(x + " is NOT equal to " + y);

     

Which of the following conditions must always be true after the while loop finishes?
while (hours < hours0 || (hours == hours0 && mins < mins0))
{
     mins += 5;
     if (mins >= 60)
     {
          mins -= 60;
          hours++;
     }
}

Consider the following method:
public int goFigure(int x)
{
     if (x < 100)
          x = goFigure(x + 10);
     return (x - 1);
}

What does goFigure(60) return?

fun is defined as follows:
public int fun(int[] v)
{
     v[0]--;
     return v[0] + 2;
}

What is the value of v[0] after the following code segment is executed?
int [] v = { 3, 4, 5 };
v[0] = fun(v);

The method xProperty is defined as follows:
public boolean xProperty(int a)
{
     return a == 2 * (a / 10 + a % 10);
}

For which of the following values of a does xProperty(a) return true?
     

Consider the method
public int[] copyX(int[] arr)
{
     int[] result = new int[arr.length];

     for (int i = 0; i < arr.length; i++)
     {
          if (arr[i] <= 0)
               break;
          if (arr[i] > 10)
               break;
          result[i] = arr[i];
     }
     return result;
}

Suppose it is rewritten as follows:
public int[] copyX(int[] arr)
{
     int[] result = new int[arr.length];
     int i = 0;

     while (< condition >)
     {
          result[i] = arr[i];
          i++;
     }
     return result;
}

Which of the following expressions can replace < condition > so that the second version is equivalent to the first one (i.e., for any int[] parameter arr, it returns the same result as the first version)?

Alicia is five years older than her brother Ben. Three years from now Alicia's age will be twice Ben's age. How old are Alicia and Ben now? Ha wrote the following program to solve this puzzle:
public class AliciaAndBen
{
     public static void main(String[] args)
     {
          for (int a = 1; a <= 100; a++)
               for (int b = 1; b <= 100; b++)
                    if (< condition >)
                         System.out.println("Alicia is " + a + " and Ben is " + b);
     }
}

Which of the following expressions should replace < condition > in Hal's program so that it displays the correct solution to the puzzle?

Suppose a two-dimensional array of chars m has 4 rows and 5 columns and holds the values represented in the picture below:
x.xxx
xx..x
.x.xx
xx...

What are the values in m after the following code segment is executed?
int r, c;
for (r = 1; r < m.length; r++)
     for (c = 1; c < m[0].length - 1; c++)
          if (m[r-1][c-1] == 'x' && m[r-1][c+1] == 'x')
               m[r][c] = 'x';