EE202 Questions-Samples

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

1. 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

1. 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

1. 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

1. What would be the value of discountRate after the following statements are executed?

doublediscountRate;

charcustType = 'B';

switch (custType)

{

case 'A':

discountRate = .08;

break;

case 'B':

discountRate = .06;

case 'C':

discountRate = .04;

default:

discountRate = 0.0;

}

0.0

1. 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

1. What will be the value of x after the following code is executed?

int x, y = 15, z = 3;

x = (y--) / (++z);

3

1. 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);

1. What will be returned from the following method?

public static intmethodA()

{

double a = 8.5 + 9.5;

return a;

}

This is an error

1. Given the following code, what will be the value of finalAmount when it is displayed?

public class Order

{

privateintorderNum;

private double orderAmount;

private double orderDiscount;

public Order(intorderNumber, double orderAmt,

doubleorderDisc)

{

orderNum = orderNumber;

orderAmount = orderAmt;

orderDiscount = orderDisc;

}

publicintgetOrderAmount()

{

returnorderAmount;

}

publicintgetOrderDisc()

{

returnorderDisc;

}

}

public class CustomerOrder

{

public static void main(String[] args)

{

intordNum = 1234;

doubleordAmount = 580.00;

doublediscountPer = .1;

Order order;

doublefinalAmount = 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.

1. 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

1. 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”);

}

1. 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++;

}

1. 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.

importjava.util.Scanner;

importjava.util.Random;

public class RandomInteger {

public static void main(String [] args) {

intinputNum, 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

1. 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;

}

1. 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.

publicbooleancontainsPair(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;

}

1. Write a method that accepts an array of integers and returns the smallest value in the list.

publicint smallest(int[] list) {

intcurrentSmallest = list[0];

for(int i = 0; i < list.length; i++)

if(list[i] < currentSmallest)

currentSmallest = list[i];

returncurrentSmallest;

}