Question 1

In order to generate a random number, you must use Math.random().

Accepted Answer

A) True 
 B)False

Question 2

Example Code Ch 02-2
import java.util.Scanner;
public class Questions33_34
{
public static void main(String[] args)
{
int x, y, z;
double average;
Scanner scan = new Scanner(System.in);
System.out.println("Enter an integer value");
x = scan.nextInt();
System.out.println("Enter another integer value");
y = scan.nextInt();
System.out.println("Enter a third integer value");
z = scan.nextInt();
average = (x + y + z) / 3;
System.out.println("The result of my calculation
is " + average);
}
}
-Refer to Example Code Ch 02-2. This code computes

Accepted Answer

A)  The correct average of x, y, and z as a double 
B)  The correct average of x, y, and z as an int 
C)  The average of x, y, and z as a double but the result may not be accurate 
D)  The sum of x, y, and z as an int 
E)  The remainder of the sum of x, y, and z divided by 3 
A)  The correct average of x, y, and z as a double 
B)  The correct average of x, y, and z as an int 
C)  The average of x, y, and z as a double but the result may not be accurate 
D)  The sum of x, y, and z as an int 
E)  The remainder of the sum of x, y, and z divided by 3

Question 3

Of the following types, which one cannot store a numeric value?

Accepted Answer

A)  int 
B)  double 
C)  float 
D)  char 
E)  All of these can store numeric values 
A)  int 
B)  double 
C)  float 
D)  char 
E)  All of these can store numeric values

Question 4

Write the paint method for an applet so that it contains 4 concentric circles (each circle is inside the previous circle), where the largest circle is bounded by a 400x400 box and the smallest is bounded by a 100x100 box. Each circle is centered on an applet that is 400x400. Make each circle a different color of your choice.

Accepted Answer

public void paint(Graphics page)
{
page.

Question 5

Which library package would you import to use the class Random?

Accepted Answer

A)  java.beans 
B)  java.io 
C)  java.lang 
D)  java.text 
E)  java.util 
A)  java.beans 
B)  java.io 
C)  java.lang 
D)  java.text 
E)  java.util

Question 6

What is wrong with the following assignment statement? Assume x and y are both String objects.
String z = x.equals(y);

Accepted Answer

The equals method returns a bo

Question 7

The values of (double)5/2 and (double)(5/2) are identical.

Accepted Answer

A) True 
 B)False

In order to generate a random number, you must use Math.random().

Of the following types, which one cannot store a numeric value?

Which library package would you import to use the class Random?

What is wrong with the following assignment statement? Assume x and y are both String objects. String z = x.equals(y);

The values of (double)5/2 and (double)(5/2) are identical.

Introduction

Using Classes and Objects

Writing Classes

Conditionals and Loops

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters

Exam 2: Data and Expressions

In order to generate a random number, you must use Math.random().

Of the following types, which one cannot store a numeric value?

Which library package would you import to use the class Random?

What is wrong with the following assignment statement? Assume x and y are both String objects. String z = x.equals(y);

The values of (double)5/2 and (double)(5/2) are identical.

Introduction

Using Classes and Objects

Writing Classes

Conditionals and Loops

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters