01 - AP Exam question set #1 (Easy)

System.out.println(18 % 5);

System.out.println(2 + 3 * 5 - 1);

double a = 9.6982;
int b = 12;
b = (int) a;

String s1 = "Hey";
String s2 = s1.substring(0,1);
String s3 = s2.toLowerCase();

String s1 = "ac ded ca";
int pos = s1.indexOf("d");

if (x > 0 || (y / x) == 3) System.out.println("first case");
else System.out.println("second case");

if (score >= 90) grade = "A";
if (score >= 80) grade = "B";
if (score >= 70) grade = "C";
if (score >= 60) grade = "D";
else grade = "E";

class SomeClass
{
    int someVar;
}

public class MainClass
{
    public static void main(String[] args)
    {
        SomeClass x = new SomeClass();
        System.out.println(x.someVar);
    }
}

int x = 3;
int y = 2;
if (y / x > 0)
   System.out.print("first ");
   System.out.print("second ");

int var1 = 0;
int var2 = 2;

while ((var2 != 0) && ((var1 / var2) >= 0)) {
   var1 = var1 + 1;
   var2 = var2 - 1;
}

OUTPUT
======
11111
2222
333
44
5

CODE
=====

for (int j = 1; j <= 5; j++) {
        for (int k = 5; k >= 1; k--) {
           System.out.print(j + " ");
        }
        System.out.println();
     }

public class Liquid
{
    private int currentTemp;
    private int boilingPoint;

    public Liquid(int ct, int bp)
    {
        currentTemp = ct;
        boilingPoint = bp;
    }

    public void changeTemp(int newTemp)
    {
        currentTemp = newTemp;
    }

    public void increaseTemp(int howMuch)
    {
        currentTemp = newTemp + howMuch;
    }

}

private int[ ] a = {1, 3, -5, -2};

public void mult(int amt)
{
   int i = 0;
   while (i < a.length)
   {
      a[i] = a[i] * amt;
   } // end while
} // end method

private int[ ] a = {1, 3, -5, -2};

public void multAll(int amt)
{
   int i = 0;
   while (i < a.length)
   {
      a[i] = a[i] * amt;
      i++;
   } // end while
} // end method

List list1 = new ArrayList();
list1.add("Adam");
list1.add("Lillith");
list1.add("Sharon");
list1.set(0, "Dylan");
list1.add(0, "Selasie");
System.out.println(list1);

List list1 = new ArrayList();
list1.add(new Integer(1));
list1.add(new Integer(2));
list1.add(new Integer(3));
list1.remove(1);
System.out.println(list1);

int[][] a = { {2, 4, 6, 8}, {1, 2, 3, 4}};

A vintage store wishes to go online.
Customers can search for and order via a website.

The store has books, films and old records. 
For each type of published material 
(books, films, records) they need to track the 
id, title, author(s), date published, and price. 

Which of the following would you suggest as the
best, most efficient, design?

A platform game app is being written by a
small team of programmers. 

One coder is implementing a class called Player; 
another in the team is writing code that will 
use the Player class. 

Which of the following aspects of the public methods
and fields of the Player class does not need to be 
known by both programmers?

int[][] a = { {2, 4, 6, 8}, {1, 2, 3, 4}};

A realtor (real estate) house selling company
needs a program to store information
about their latest houses for sale. 

For each house, they want to store and
track the following information: 

>number of bedrooms (<2 or 4+),
>whether the house has a garden
>and its average gas and electricity bills per month. 

Which of the following is the best design?

public static int evenMult(int n)
{
   if (n == 1) {
      return 2;
   } else {
      return 2 * n * evenMult(n - 1);
   }
}

public static int fibonacci(int n)
{
   if (n == 0)
      return 0;
   else if (n == 1)
      return 1;
   else return fibonacci(n-1) + fibonacci(n-2);
    }

public String moonStar(int n)
{
   if (n == 0) {
      return "*";
   } else {
      return moonStar(n - 1) + moonStar(n - 1);
   }
}