Question 1

Explain how you can override a unifying type imposed by Java. Show an example.

Accepted Answer

You can purposely override the unifying type imposed by Java by performing a type cast. Type casting forces a value of one data type to be used as a value of another type. To perform a type cast, you use a cast operator, which is created by placing the desired result type in parentheses. Using a cast operator is an explicit conversion. The cast operator is followed by the variable or constant to be cast. 
 Example: 
 double bankBalance = 189.66; 
float weeklyBudget = (float) (bankBalance / 4);

Question 2

You can create a confirm dialog box with five arguments.

Accepted Answer

A) True 
 B)False  True

Question 3

Write the statement to declare an uninitialized integer value for salesAmt . Then write the statement to declare a constant named SALESAMT with a value of 20.99.

Accepted Answer

int salesAmt ; 
final double SALESAMT = 20.99;

Question 4

A(n) ____ dialog box typically displays the options Yes, No, and Cancel.

Accepted Answer

A)  confirm 
B)  input 
C)  message 
D)  answer 
A)  confirm 
B)  input 
C)  message 
D)  answer

Question 5

Describe how to use the boolean data type. Show two examples of a boolean variable assignment; one that uses true or false and one that uses a relational operator.

Accepted Answer

Boolean logic is based on true or false

Question 6

The term parse means to break into component parts.

Accepted Answer

A) True 
 B)False

Question 7

____ occurs when both of the operands are integers.

Accepted Answer

A)  Data modeling 
B)  Type cast 
C)  Integer division 
D)  Unlike assignment 
A)  Data modeling 
B)  Type cast 
C)  Integer division 
D)  Unlike assignment

Question 8

In Java, ____ is a built-in class that provides you with the means for storing and manipulating character strings.

Accepted Answer

A)  Escape 
B)  Type 
C)  String 
D)  Character 
A)  Escape 
B)  Type 
C)  String 
D)  Character

Question 9

Match between columns
                        Premises: Java consistently specifies their size and format
true or false
Begins with a backslash followed by a character
The operator that is represented by an equal sign (=)
A programming term for an unknown value
Rules for the order in which parts of a mathematical expression are evaluated
Created by placing the desired result type in parentheses
A floating-point data type
A value that can be used on either side of an operator

Accepted Answer

The Answer of operand and cast operator and operator precedence is...

Question 10

A data item is ____ when it cannot be changed while a program is running.

Accepted Answer

A)  variable 
B)  constant 
C)  primitive 
D)  literal 
A)  variable 
B)  constant 
C)  primitive 
D)  literal

Question 11

Which of the following is NOT a component of a variable declaration statement?

Accepted Answer

A)  data type identifier 
B)  symbolic constant 
C)  variable name 
D)  ending semicolon 
A)  data type identifier 
B)  symbolic constant 
C)  variable name 
D)  ending semicolon

Question 12

You can store any character, including nonprinting characters such as a backspace or a tab, in a(n) ____ variable.

Accepted Answer

A)  int 
B)  char 
C)  boolean 
D)  set 
A)  int 
B)  char 
C)  boolean 
D)  set

Question 13

Primitive types serve as the building blocks for more complex data types, called ____ types.

Accepted Answer

A)  integer 
B)  literal 
C)  reference 
D)  data 
A)  integer 
B)  literal 
C)  reference 
D)  data

Question 14

What is an escape sequence and why would a Java programmer use it to store a character?

Accepted Answer

You can store any character-including no

Question 15

A variable can hold more than one value at a time.

Accepted Answer

A) True 
 B)False

Question 16

____ refers to the order in which values are used with operators.

Accepted Answer

A)  Associativity 
B)  Initialization 
C)  Declaration 
D)  Floating 
A)  Associativity 
B)  Initialization 
C)  Declaration 
D)  Floating

Question 17

Describe the error message that will be produced when the following code is compiled. 
public class SalesOct 
{ 
    public static void main(String[] args) 
    { 
int salesAmt; 
System.out.print("October sales are $"); 
System.out.println(salesAmt); 
     } 
}

Accepted Answer

The second println statement will genera

Question 18

public class EndValue 
{ 
    public static void main(String[] args) 
    { 
int aByte = 940; 
   System.out.print("The ending value is "+ aByte); 
    } 
} 
When the above code is compiled, what error message will be generated and why?

Accepted Answer

The above code will result in the error

Question 19

Describe how the Scanner class works with the System.in object in order to provide flexibility. Provide an example of using the Scanner class with System.in.

Accepted Answer

The System.in object is designed to read

Question 20

When you write programs that accept ____________________, there is a risk that the user will enter the wrong type of data.

Accepted Answer

The answer of When you write programs that accept ____________________,...

Explain how you can override a unifying type imposed by Java. Show an example.

You can create a confirm dialog box with five arguments.

Write the statement to declare an uninitialized integer value for salesAmt . Then write the statement to declare a constant named SALESAMT with a value of 20.99.

A(n) ____ dialog box typically displays the options Yes, No, and Cancel.

Describe how to use the boolean data type. Show two examples of a boolean variable assignment; one that uses true or false and one that uses a relational operator.

The term parse means to break into component parts.

____ occurs when both of the operands are integers.

In Java, ____ is a built-in class that provides you with the means for storing and manipulating character strings.

A data item is ____ when it cannot be changed while a program is running.

Which of the following is NOT a component of a variable declaration statement?

You can store any character, including nonprinting characters such as a backspace or a tab, in a(n) ____ variable.

Primitive types serve as the building blocks for more complex data types, called ____ types.

What is an escape sequence and why would a Java programmer use it to store a character?

A variable can hold more than one value at a time.

____ refers to the order in which values are used with operators.

Describe the error message that will be produced when the following code is compiled. public class SalesOct { public static void main(String[] args) { int salesAmt; System.out.print("October sales are $"); System.out.println(salesAmt); } }

public class EndValue { public static void main(String[] args) { int aByte = 940; System.out.print("The ending value is "+ aByte); } } When the above code is compiled, what error message will be generated and why?

Describe how the Scanner class works with the System.in object in order to provide flexibility. Provide an example of using the Scanner class with System.in.

When you write programs that accept ____________________, there is a risk that the user will enter the wrong type of data.

Creating Java Programs

Using Methods Classes and Objects

More Object Concepts

Making Decisions

Looping

Characters Strings and the Stringbuilder

Arrays

Advanced Array Concepts

Introduction to Inheritance

Advanced Inheritance Concepts

Exception Handling

File Input and Output

Introduction to Swing Components

Advanced Gui Topics

Graphics

Filters

Exam 2: Using Data

Explain how you can override a unifying type imposed by Java. Show an example.

You can create a confirm dialog box with five arguments.

Write the statement to declare an uninitialized integer value for salesAmt . Then write the statement to declare a constant named SALESAMT with a value of 20.99.

A(n) ____ dialog box typically displays the options Yes, No, and Cancel.

Describe how to use the boolean data type. Show two examples of a boolean variable assignment; one that uses true or false and one that uses a relational operator.

The term parse means to break into component parts.

____ occurs when both of the operands are integers.

In Java, ____ is a built-in class that provides you with the means for storing and manipulating character strings.

A data item is ____ when it cannot be changed while a program is running.

Which of the following is NOT a component of a variable declaration statement?

You can store any character, including nonprinting characters such as a backspace or a tab, in a(n) ____ variable.

Primitive types serve as the building blocks for more complex data types, called ____ types.

What is an escape sequence and why would a Java programmer use it to store a character?

A variable can hold more than one value at a time.

____ refers to the order in which values are used with operators.

Describe the error message that will be produced when the following code is compiled. public class SalesOct { public static void main(String[] args) { int salesAmt; System.out.print("October sales are $"); System.out.println(salesAmt); } }

public class EndValue { public static void main(String[] args) { int aByte = 940; System.out.print("The ending value is "+ aByte); } } When the above code is compiled, what error message will be generated and why?

Describe how the Scanner class works with the System.in object in order to provide flexibility. Provide an example of using the Scanner class with System.in.

When you write programs that accept ____________________, there is a risk that the user will enter the wrong type of data.

Creating Java Programs

Using Methods Classes and Objects

More Object Concepts

Making Decisions

Looping

Characters Strings and the Stringbuilder

Arrays

Advanced Array Concepts

Introduction to Inheritance

Advanced Inheritance Concepts

Exception Handling

File Input and Output

Introduction to Swing Components

Advanced Gui Topics

Graphics

Filters