EE202 Questions-Samples
1. What will be displayed as a result of executing the following code?
int x = 5, y = 20;
x += 32;
y /= 4;
System.out.println("x = " + x + ", y = " + y);
x = 37, y = 5
2. What will be the value of z as a result of executing the following code?
int x = 5, y = 28;
float z;
z = (float) (y / x);
5.0
3. What would be the value of bonus after the following statements are executed?
int bonus, sales = 1250;
if (sales > 1000) bonus = 100;
if (sales > 750) bonus = 50;
if (sales > 500) bonus = 25;
else
bonus = 0;
0
4. What would be the value of x after the following statements were executed?
int x = 10;
switch (x) {
case 10:
x += 15;
case 12:
x -= 5;
break;
default:
x *= 3;
} 20
5. What would be the value of discountRate after the following statements are executed?
double discountRate;
char custType = 'B';
switch (custType) {
case 'A':
discountRate = .08;
break;
case 'B':
discountRate = .06;
case 'C':
discountRate = .04;
default:
discountRate = 0.0;
} 0.0
6. In the following code, what values could be read into number to terminate the while loop?
Scanner keyboard = new Scanner(System.in);
System.out.print("Enter a number: ");
int number = keyboard.nextInt();
while (number < 100 && number > 500) {
System.out.print("Enter another number: ");
number = keyboard.nextInt();
}
The boolean condition can never be true
7. What will be the value of x after the following code is executed?
int x, y = 15, z = 3;
x = (y--) / (++z);
3
8. what would be a valid method call for the following method?
public static void showProduct (int num1, double num2) {
int product;
product = num1 * (int)num2;
System.out.println("The product is " + product);
}
showProduct(10, 4.5);
9. What will be returned from the following method?
public static int methodA() {
double a = 8.5 + 9.5;
return a;
}
This is an error
10. Given the following code, what will be the value of finalAmount when it is displayed?
public class Order {
private int orderNum;
private double orderAmount;
private double orderDiscount;
public Order(int orderNumber, double orderAmt, double orderDisc)
{
orderNum = orderNumber;
orderAmount = orderAmt;
orderDiscount = orderDisc;
}
public int getOrderAmount() {
return orderAmount;
}
public int getOrderDisc()
{
return orderDisc;
} }
public class CustomerOrder {
public static void main(String[] args) {
int ordNum = 1234;
double ordAmount = 580.00;
double discountPer = .1;
Order order;
double finalAmount = order.getOrderAmount() – order.getOrderAmount() * order.getOrderDisc();
System.out.println("Final order amount = $" + finalAmount);
} }
There is no value because the object order has not been created.
11. What will be the value of x[1] after the following code is executed?
int[] x = {22, 33, 44};
arrayProcess(x);
…
public static void arrayProcess(int[] a) {
for(int k = 0; k < 3; k++) {
a[k] = a[k] + 5;
} }
38
12. Write a method that prints your name, age, and major. The method should accept no parameters and return no value.
public void myInfo() {
System.out.println(“Name:\tJohn Smith”);
System.out.println(“Age:\t30”);
System.out.println(“Major:\tBasket Weaving”);
}
13. Rewrite the following for loop as a while loop.
for(int i = 0; i < MAX; i++) //loop body
int i = 0;
while(i < MAX) { //loop body i++;
}
14. Write a short program that allows the user to input a positive integer and then outputs a randomly generated integer between 1 and the input number.
import java.util.Scanner;
import java.util.Random;
public class RandomInteger {
public static void main(String [] args) { int inputNum, randNum;
Scanner input = new Scanner(System.in);
Random generator = new Random();
System.out.print(“Please enter a positive integer: “);
inputNum = input.nextInt();
randNum = generator.nextInt(inputNum) + 1;
System.out.println(“Your random number is “ + randNum + “.”);
}//end main }//end class
15. Write a method called average that accepts an array of floating point numbers and returns their average.
public double average(float[] array) { double sum = 0;
for(int i = 0; i < array.length; i++) sum += array[i];
return (double) sum/array.length;
}
16. Write a method called containsPair that accepts an array of integers as a parameter and returns true if it contains two integers that are equal.
public boolean containsPair(int[] values) { for(int i = 0; i < values.length; i++) {
for(int j = i+1; j < values.length; j++) if(values[i] == values[j])
return true;
}
return false;
}
17. Write a method that accepts an array of integers and returns the smallest value in the list.
public int smallest(int[] list) { int currentSmallest = list[0];
for(int i = 0; i < list.length; i++) if(list[i] < currentSmallest)
currentSmallest = list[i];
return currentSmallest;
}
