Solution Manual & Test Bank for Java
Software Solutions, Global Edition, 9th
Edition by John Lewis
,Java Software Solutions, 9e (Lewis/Loftus)
Chapter 1 Introduction
TRUE/FALSE
1. All information is stored in the computer using binary numbers.
ANS: T
The computer is a digital device meaning that it stores information in one of two states using binary.
We must determine then how to represent meaningful information (such as a name or a program
instruction or an image) in binary.
2. Java is an object-oriented programming language.
ANS: T
Java is classified as a high-level programming language but it is also classified as an object-oriented
programming language because it allows the programmer to implement data structures as classes.
3. System.out.print is used in a program to denote that a documentation comment follows.
ANS: F
Documentation comments follow // marks or are embedded between */ and */.
System.out.print is an instruction used to output a message to the screen (the Java console
window).
4. Java byte codes are directly executable whereas Java source code is not.
ANS: F
Neither Java source code nor Java byte codes are executable. Both must be compiled or interpreted
into machine code. Java byte codes are useful however in that they are machine-independent but
semi-compiled code that allows your Java code to be transmitted over the Internet and executed on
another computer even if that other computer is a completely different type.
5. The Java compiler is able to find all programmer errors.
ANS: F
The Java compiler can find syntax errors but cannot find either logical errors (errors that are caused
because of poor logic in writing the program) or run-time errors (errors that arise during the execution
of the program).
6. Java is a case-sensitive language which means Current, CURRENT, and current will all reference
the same identifier.
ANS: F
, Java is case sensitive which means that Current, CURRENT, and current will all be recognized
as different identifiers. This causes problems with careless programmers who do not spell an
identifier consistently in terms of upper and lower case characters.
7. Code placed inside of comments will not be compiled and, therefore, will not execute.
ANS: T
The compiler discards comments; therefore, any code inside a comment is discarded and is not
compiled. Your executable program consists only of the code that is compiled.
8. The word Public is a reserved word.
ANS: F
public is a reserved word, but since Java is case sensitive, Public differs from public and
therefore Public is not a reserved word.
9. Reserved words in Java can be redefined by the programmer to mean something other than their
original intentions.
ANS: F
Java reserved words cannot be redefined.
10. In a Java program, dividing by zero is a syntax error.
ANS: F
Dividing by 0 is not detected at compile time, and because a computer cannot divide by 0, this is a run-
time error.
11. In a Java program, dividing by zero is a syntax error.
ANS: F
Dividing by 0 is not detected at compile time, and because a computer cannot divide by 0, this is a run-
time error.
12. During translation, the compiler puts its output (the compiled Java program) into ROM.
ANS: F
ROM stands for read-only-memory. The compiled output (the byte codes) may be placed into RAM
(writable random access memory) or into a file (on your hard drive, for example).
13. Objects are defined by a class that describes the characteristics common to all instances of the class.
ANS: T
An object is an instance of a class. And, the purpose of a class is to describe these common
characteristics.
, 14. Inheritance is a form of software reuse.
ANS: T
Inheritance allows us to capitalize on the similarities among various kinds of classes that have a
common base (parent) class. Thus we reuse the base class each time a class inherits from it.
15. Polymorphism is the idea that we can refer to multiple types of related objects in consistent ways.
ANS: T
Polymorphism allows us to use the same name for similar behaviors that occur among diverse and
possibly unrelated objects. For example, to "open" may refer to a file, or to a device, or to a
communications line, etc. The same term, "open," is being used even though the objects that are
being opened are quite different.
16. In Java, identifiers may be of any length up to a limit determined by the compiler.
ANS: F
Java (and Java compilers) do not limit the length of the identifiers you use. Identifiers may be as long
as you wish. Good programming practice, however, will limit the lengths of the identifiers you
create.
MULTIPLE CHOICE
1. A Java program is best classified as
a. hardware
b. software
c. storage
d. processor
e. input
ANS: B
Programs are classified as software to differentiate them from the mechanisms of the computer
(hardware). Storage and the processor are two forms of hardware while input is the information that
the program processes.
2. Six bits can be used to represent distinct items or values.
a. 6
b. 20
c. 24
d. 32
e. 64
ANS: E
With n bits, we can represent 2^n different values. 2^6 = 64.
3. When executing a program, the processor reads each program instruction from
a. secondary memory (storage)
b. the Internet
Software Solutions, Global Edition, 9th
Edition by John Lewis
,Java Software Solutions, 9e (Lewis/Loftus)
Chapter 1 Introduction
TRUE/FALSE
1. All information is stored in the computer using binary numbers.
ANS: T
The computer is a digital device meaning that it stores information in one of two states using binary.
We must determine then how to represent meaningful information (such as a name or a program
instruction or an image) in binary.
2. Java is an object-oriented programming language.
ANS: T
Java is classified as a high-level programming language but it is also classified as an object-oriented
programming language because it allows the programmer to implement data structures as classes.
3. System.out.print is used in a program to denote that a documentation comment follows.
ANS: F
Documentation comments follow // marks or are embedded between */ and */.
System.out.print is an instruction used to output a message to the screen (the Java console
window).
4. Java byte codes are directly executable whereas Java source code is not.
ANS: F
Neither Java source code nor Java byte codes are executable. Both must be compiled or interpreted
into machine code. Java byte codes are useful however in that they are machine-independent but
semi-compiled code that allows your Java code to be transmitted over the Internet and executed on
another computer even if that other computer is a completely different type.
5. The Java compiler is able to find all programmer errors.
ANS: F
The Java compiler can find syntax errors but cannot find either logical errors (errors that are caused
because of poor logic in writing the program) or run-time errors (errors that arise during the execution
of the program).
6. Java is a case-sensitive language which means Current, CURRENT, and current will all reference
the same identifier.
ANS: F
, Java is case sensitive which means that Current, CURRENT, and current will all be recognized
as different identifiers. This causes problems with careless programmers who do not spell an
identifier consistently in terms of upper and lower case characters.
7. Code placed inside of comments will not be compiled and, therefore, will not execute.
ANS: T
The compiler discards comments; therefore, any code inside a comment is discarded and is not
compiled. Your executable program consists only of the code that is compiled.
8. The word Public is a reserved word.
ANS: F
public is a reserved word, but since Java is case sensitive, Public differs from public and
therefore Public is not a reserved word.
9. Reserved words in Java can be redefined by the programmer to mean something other than their
original intentions.
ANS: F
Java reserved words cannot be redefined.
10. In a Java program, dividing by zero is a syntax error.
ANS: F
Dividing by 0 is not detected at compile time, and because a computer cannot divide by 0, this is a run-
time error.
11. In a Java program, dividing by zero is a syntax error.
ANS: F
Dividing by 0 is not detected at compile time, and because a computer cannot divide by 0, this is a run-
time error.
12. During translation, the compiler puts its output (the compiled Java program) into ROM.
ANS: F
ROM stands for read-only-memory. The compiled output (the byte codes) may be placed into RAM
(writable random access memory) or into a file (on your hard drive, for example).
13. Objects are defined by a class that describes the characteristics common to all instances of the class.
ANS: T
An object is an instance of a class. And, the purpose of a class is to describe these common
characteristics.
, 14. Inheritance is a form of software reuse.
ANS: T
Inheritance allows us to capitalize on the similarities among various kinds of classes that have a
common base (parent) class. Thus we reuse the base class each time a class inherits from it.
15. Polymorphism is the idea that we can refer to multiple types of related objects in consistent ways.
ANS: T
Polymorphism allows us to use the same name for similar behaviors that occur among diverse and
possibly unrelated objects. For example, to "open" may refer to a file, or to a device, or to a
communications line, etc. The same term, "open," is being used even though the objects that are
being opened are quite different.
16. In Java, identifiers may be of any length up to a limit determined by the compiler.
ANS: F
Java (and Java compilers) do not limit the length of the identifiers you use. Identifiers may be as long
as you wish. Good programming practice, however, will limit the lengths of the identifiers you
create.
MULTIPLE CHOICE
1. A Java program is best classified as
a. hardware
b. software
c. storage
d. processor
e. input
ANS: B
Programs are classified as software to differentiate them from the mechanisms of the computer
(hardware). Storage and the processor are two forms of hardware while input is the information that
the program processes.
2. Six bits can be used to represent distinct items or values.
a. 6
b. 20
c. 24
d. 32
e. 64
ANS: E
With n bits, we can represent 2^n different values. 2^6 = 64.
3. When executing a program, the processor reads each program instruction from
a. secondary memory (storage)
b. the Internet
