Question 1

What is the value of z after the following assignment statement is executed? float z = 5/10;

Accepted Answer

A)  0.0 
B)  0.5 
C)  5.0 
D)  0.05 
E)  None of these; a run-time error will occur because z is a float and 5/10 is an int. 
A)  0.0 
B)  0.5 
C)  5.0 
D)  0.05 
E)  None of these; a run-time error will occur because z is a float and 5/10 is an int.

Question 2

How do the statements "import java.util.*;" and "import java.util.Random;" differ from each other?

Accepted Answer

In the former, all of the classes define

Question 3

Assume that x and y are ints equal to 10 and 5 respectively. What is the output of the following statement? System.out.println("" + x + y);

Accepted Answer

A)  15 
B)  105 
C)  10 5 
D)  x + y 
E)  this would cause an error since neither x nor y is a String 
A)  15 
B)  105 
C)  10 5 
D)  x + y 
E)  this would cause an error since neither x nor y is a String

Question 4

Which of the following would return the last character of the String x?

Accepted Answer

A)  x.charAt(0); 
B)  x.charAt(last); 
C)  x.charAt(length(x)); 
D)  x.charAt; 
E)  x.charAt(x.length()); 
A)  x.charAt(0); 
B)  x.charAt(last); 
C)  x.charAt(length(x)); 
D)  x.charAt; 
E)  x.charAt(x.length());

Question 5

In order to create a constant, which of the following Java reserved words is used?

Accepted Answer

A)  private 
B)  static 
C)  int 
D)  final 
E)  class 
A)  private 
B)  static 
C)  int 
D)  final 
E)  class

Question 6

Provide three examples of code using assignment statements where one assignment statement would result in a syntax error, one would result in a logical error, and one would result in a run-time error.

Accepted Answer

Answers will vary. Examples:
// syntax e

Question 7

What will be the value of z after the following statement is executed? int z = 50 /10.00;

Accepted Answer

A)  5 
B)  5.0 
C)  50 
D)  10 
E)  None of thse; a run-time error will occur because z is an int and 50/10.00 is not 
A)  5 
B)  5.0 
C)  50 
D)  10 
E)  None of thse; a run-time error will occur because z is an int and 50/10.00 is not

Question 8

Which of the following situations would require a cast?

Accepted Answer

A)  using charAt to take an element of a String and store it in a char 
B)  storing an int in a float 
C)  storing a float in a double 
D)  storing a float in an int 
E)  All of these require casts 
A)  using charAt to take an element of a String and store it in a char 
B)  storing an int in a float 
C)  storing a float in a double 
D)  storing a float in an int 
E)  All of these require casts

Question 9

A variable of type boolean will store either a 0 or a 1.

Accepted Answer

A) True 
 B)False

Question 10

In Java, 'a' and 'A' are considered to be different values.

Accepted Answer

A) True 
 B)False

Question 11

The word println is a(n)

Accepted Answer

A)  method 
B)  reserved word 
C)  variable 
D)  class 
E)  String 
A)  method 
B)  reserved word 
C)  variable 
D)  class 
E)  String

Question 12

Example Code Ch 02-1
public class Questions1_4
{
public static void main(String[] args)
{
System.out.print("Here");
System.out.println("There " + "Everywhere");
System.out.println("But not" + "in Texas");
}
}
-Refer to the class definition in Example Code Ch 02-1. A reasonable documentation comment for this program might be

Accepted Answer

A)  //a program that demonstrates the differences between print, println, and how + works 
B)  //a program that outputs a message about Texas 
C)  //a program that demonstrates nothing at all 
D)  //a program that outputs the message "Here There Everywhere But not in Texas 
E)  //a program that contains three output statements 
A)  //a program that demonstrates the differences between print, println, and how + works 
B)  //a program that outputs a message about Texas 
C)  //a program that demonstrates nothing at all 
D)  //a program that outputs the message "Here There Everywhere But not in Texas 
E)  //a program that contains three output statements

Question 13

A double is wider than a float and a float is wider than an int.

Accepted Answer

A) True 
 B)False

Question 14

Assume that a = "1", b = "2", y = 3, and z = 4. How do the following two statements differ?
System.out.println(a + b + y + z);
System.out.println(y + z + a + b);

Accepted Answer

In the first statement, since a and b ar

Question 15

Provide an example of how you might use a boolean, a float, a char, a String, and an int.

Accepted Answer

Answers may vary. Samples:
boolean to st

Question 16

Using the various String methods, manipulate a String called current to be the last character of current followed by the remainder of its characters in order, placing the result in a String called rearranged.

Accepted Answer

String rearranged = current.charAt(curre

Question 17

If you want to output the text "hi there" including the quote marks, which of the following would you use?

Accepted Answer

A)  System.out.println("hi there"); 
B)  System.out.println(""hi there""); 
C)  System.out.println("\"hi there"); 
D)  System.out.println("\"hi there\""); 
E)  None of these; it is not possible to output a quote mark because it is used to mark the beginning and end of the String to be displayed. 
A)  System.out.println("hi there"); 
B)  System.out.println(""hi there""); 
C)  System.out.println("\"hi there"); 
D)  System.out.println("\"hi there\""); 
E)  None of these; it is not possible to output a quote mark because it is used to mark the beginning and end of the String to be displayed.

Question 18

Write a set of instructions to prompt the user for an int value and input it using the Scanner class into the variable x and prompt the user for a float value and input it using the Scanner class into the variable y.

Accepted Answer

Scanner scan = Scanner.create(

Question 19

Write a program that will input some number of cents (less than 100) and output the number of quarters, dimes, nickels and pennies needed to add up to that amount.

Accepted Answer

import java.util.Scanner;
public class C

Question 20

Example Code Ch 02-1
public class Questions1_4
{
public static void main(String[] args)
{
System.out.print("Here");
System.out.println("There " + "Everywhere");
System.out.println("But not" + "in Texas");
}
}
-Refer to the class definition in Example Code Ch 02-1. The program will print the word "Here" and then print

Accepted Answer

A)  "There Everywhere" on the line after "Here" 
B)  "The" on the line after "Here" and "Everywhere" on the line after "There" 
C)  "There Everywhere" on the same line as "Here" 
D)  "ThereEverywhere" on the same line as "Here" 
E)  "ThereEverywhere" on the line after "Here" 
A)  "There Everywhere" on the line after "Here" 
B)  "The" on the line after "Here" and "Everywhere" on the line after "There" 
C)  "There Everywhere" on the same line as "Here" 
D)  "ThereEverywhere" on the same line as "Here" 
E)  "ThereEverywhere" on the line after "Here"

What is the value of z after the following assignment statement is executed? float z = 5/10;

How do the statements "import java.util.*;" and "import java.util.Random;" differ from each other?

Assume that x and y are ints equal to 10 and 5 respectively. What is the output of the following statement? System.out.println("" + x + y);

Which of the following would return the last character of the String x?

In order to create a constant, which of the following Java reserved words is used?

Provide three examples of code using assignment statements where one assignment statement would result in a syntax error, one would result in a logical error, and one would result in a run-time error.

What will be the value of z after the following statement is executed? int z = 50 /10.00;

Which of the following situations would require a cast?

A variable of type boolean will store either a 0 or a 1.

In Java, 'a' and 'A' are considered to be different values.

The word println is a(n)

A double is wider than a float and a float is wider than an int.

Assume that a = "1", b = "2", y = 3, and z = 4. How do the following two statements differ? System.out.println(a + b + y + z); System.out.println(y + z + a + b);

Provide an example of how you might use a boolean, a float, a char, a String, and an int.

Using the various String methods, manipulate a String called current to be the last character of current followed by the remainder of its characters in order, placing the result in a String called rearranged.

If you want to output the text "hi there" including the quote marks, which of the following would you use?

Write a set of instructions to prompt the user for an int value and input it using the Scanner class into the variable x and prompt the user for a float value and input it using the Scanner class into the variable y.

Write a program that will input some number of cents (less than 100) and output the number of quarters, dimes, nickels and pennies needed to add up to that amount.

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

What is the value of z after the following assignment statement is executed? float z = 5/10;

How do the statements "import java.util.*;" and "import java.util.Random;" differ from each other?

Assume that x and y are ints equal to 10 and 5 respectively. What is the output of the following statement? System.out.println("" + x + y);

Which of the following would return the last character of the String x?

In order to create a constant, which of the following Java reserved words is used?

Provide three examples of code using assignment statements where one assignment statement would result in a syntax error, one would result in a logical error, and one would result in a run-time error.

What will be the value of z after the following statement is executed? int z = 50 /10.00;

Which of the following situations would require a cast?

A variable of type boolean will store either a 0 or a 1.

In Java, 'a' and 'A' are considered to be different values.

The word println is a(n)

A double is wider than a float and a float is wider than an int.

Assume that a = "1", b = "2", y = 3, and z = 4. How do the following two statements differ? System.out.println(a + b + y + z); System.out.println(y + z + a + b);

Provide an example of how you might use a boolean, a float, a char, a String, and an int.

Using the various String methods, manipulate a String called current to be the last character of current followed by the remainder of its characters in order, placing the result in a String called rearranged.

If you want to output the text "hi there" including the quote marks, which of the following would you use?

Write a set of instructions to prompt the user for an int value and input it using the Scanner class into the variable x and prompt the user for a float value and input it using the Scanner class into the variable y.

Write a program that will input some number of cents (less than 100) and output the number of quarters, dimes, nickels and pennies needed to add up to that amount.

Introduction

Using Classes and Objects

Writing Classes

Conditionals and Loops

More Conditionals and Loops

Object-Oriented Design

Arrays

Inheritance

Polymorphism

Exceptions

Recursion

Collections

Filters