Data Types Quiz

Part A: Predict what the variables k and z would equal in the program shown below. Show all floating point results to two decimal places.

/15 Marks

int i, j, k;
double x, y, z;
i = 5;
j = 7;
x = 5.0;
y = 7.0;

1. k = i + j;
2. k = j % i * 2;
3. z = x / y;
4. z = i / j;
5. z = (double) i + j / 3;
6. z = i + (double) j / 3;
7. z = i + j / 3.0;
8. z = (double) ( i + j / 3 );
9. k = (int) ( x + y / 3.0 );
10. k = (int) x + (int) y / 3;
11. z = i / j * 3.0;
12. z = 3.0 * i / j;
13. z = 3 / ( (double) i / j );
14. z = 3 / ( i / j );
15. z = (x / y)(i / y);
    
    Part B
    
16. Please write the output (what will be on the console screen) for the following java code.

/15 Marks

/*
*Created: C. Whittington
*Date: Oct. 29 2003
*Purpose: This is a file used to test student's understanding of
* data types in java. Students are asked what the output
* of the program will be.
*/

import java.awt.*;
import java.awt.event.*;

class DataTypesQuiz
{

public static void main(String args[])
{

System.out.println("Starting Data Types...");

boolean bool=true;
char char1='a';
int int1=13;
double double1=4.5;

String str1 = new String ("abcdefg");

//System.out.println (bool+(char*5));
System.out.println (bool+"\n"+char1);
System.out.println (int1+"\n"+double1+"\n"+str1);

bool = !true;
char1 = 'q';
System.out.println (char1+"\n");
char1++;
char1++;
int1 = int1 + int1 *10;

double1 = int1 / 2;

System.out.println ("Changed Values");
System.out.println (bool+"\n"+char1);
str1 = str1 + (++char1);
System.out.println (int1 + double1+"\n"+str1);
System.out.println (int1+"\n"+double1);
System.out.println ("The End.");

}

}

©2003 C. Whittington