Chapter 1 Introduction to Computers, Programs, and Java 

Section 1.2 What is a Computer?
1. ________ is the physical aspect of the computer that can be seen.
a. Hardware
b. Software
c. Operating system
d. Application program
Key:a

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2. __________ is the brain of a computer. 
a. Hardware
b. CPU
c. Memory
d. Disk
Key:b

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3. The speed of the CPU may be measured in __________. 
a. megabytes
b. gigabytes
c. megahertz
d. gigahertz
Key:cd  1 megahertz equals 1 million pulses per second and 1 gigahertz is 1000 megahertz.

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4. Why do computers use zeros and ones?
a. because combinations of zeros and ones can represent any numbers and characters.
b. because digital devices have two stable states and it is natural to use one state for 0 and the other for 1.
c. because binary numbers are simplest.
d. because binary numbers are the bases upon which all other number systems are built.
Key:b

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5. One byte has ________ bits.
a. 4
b. 8
c. 12
d. 16
Key:b

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6. Which of the following is not permanent storage devices?
a. floppy disk
b. hard disk
c. flash stick
d. CD-ROM
e. main memory
Key:e Disks and CD are used to store data permanently. Data in memory is lost after the power is turned off.

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7. ____________ is a device to connect a computer to a local area network (LAN).
a. Regular modem
b. DSL
c. Cable modem
d. NIC
Key:d Network Interface Card (NIC) is a device to connect a computer to a local area network.

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Section 1.3 Program Languages
8. ____________ are instructions to the computer. 
a. Hardware
b. Software
c. Programs
d. Keyboards
Key:bc

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9. Computer can execute the code in ____________. 
a. machine language
b. assembly language
c. high-level language
d. none of the above
Key:a

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10. ___________ translates high-level language program into machine language program.
a. An assembler
b. A compiler
c. CPU
d. The operating system
Key:b

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Section 1.4 Operating Systems
11. ____________ is an operating system. 
a. Java
b. C++
c. Windows 
d. Visual Basic
e. Ada
Key:c

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12. _____________ is a program that runs on a computer to manage and control a computer's activities.
a. Operating system
b. Java
c. Modem
d. Interpreter
e. Compiler
Key:a

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Section 1.5 Java, World Wide Web, and Beyond
13. Java was developed by ____________. 
a. Sun Microsystems 
b. Microsoft
c. Apple
d. IBM
e. Cisco Systems
Key:a

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14. Due to security reasons, Java ___________ cannot run from a Web browser in the new version of Java.
a. applications
b. applets
c. servlets
d. Micro Edition programs
Key:b

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15. ________  is not an object-oriented programming language.
a. Java
b. C++
c. C
d. C#
e. Python
Key:c

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16. ________  is interpreted.
a. Java
b. C++
c. C
d. Ada
e. Pascal
Key:a

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17. ________  is architecture-neutral.
a. Java
b. C++
c. C
d. Ada
e. Pascal
Key:a

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Section 1.6 The Java Language Specification, API, JDK, and IDE
18. ________  is a technical definition of the language that includes the syntax and semantics of the Java programming language.
a. Java language specification
b. Java API
c. Java JDK
d. Java IDE
Key:a

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19. ________ contains predefined classes and interfaces for developing Java programs.
a. Java language specification
b. Java API
c. Java JDK
d. Java IDE
Key:b

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20. ________ consists of a set of separate programs for developing and testing Java programs, each of which is invoked from a command line.
a. Java language specification
b. Java API
c. Java JDK
d. Java IDE
Key:c

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21. ________  provides an integrated development environment (IDE) for rapidly developing Java programs. Editing, compiling, building, debugging, and online help are integrated in one graphical user interface.
a. Java language specification
b. Java API
c. Java JDK
d. Java IDE
Key:d

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Section 1.7 A Simple Java Program
22.	The main method header is written as:
a.	public static void main(string[] args)
b.	public static void Main(String[] args)
c.	public static void main(String[] args)
d.	public static main(String[] args)
e.	public void main(String[] args)
Key:c

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23.	Which of the following statements is correct?
a.	Every line in a program must end with a semicolon.
b.	Every statement in a program must end with a semicolon.
c.	Every comment line must end with a semicolon.
d.	Every method must end with a semicolon.
e.	Every class must end with a semicolon.
Key:b

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24.	Which of the following statements is correct to display Welcome to Java on the console?
a.	System.out.println('Welcome to Java');
b.	System.out.println("Welcome to Java");
c.	System.println('Welcome to Java');
d.	System.out.println('Welcome to Java");
e.	System.out.println("Welcome to Java');
Key:b

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Section 1.8 Creating, Compiling, and Executing a Java Program
25. The JDK command to compile a class in the file Test.java is
a. java Test
b. java Test.java
c. javac Test.java
d. javac Test
e. JAVAC Test.java
Key:c

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26. Which JDK command is correct to run a Java application in ByteCode.class?
a. java ByteCode
b. java ByteCode.class
c. javac ByteCode.java
d. javac ByteCode
e. JAVAC ByteCode
Key:a

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27. Java compiler translates Java source code into _________.
a. Java bytecode
b. machine code
c. assembly code
d. another high-level language code
Key:a

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28. _________ is a software that interprets Java bytecode.
a. Java virtual machine
b. Java compiler
c. Java debugger
d. Java API
Key:a

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29. Suppose you define a Java class as follows:

public class Test {

}

In order to compile this program, the source code should be stored in a file named
a. Test.class
b. Test.doc
c. Test.txt
d. Test.java
e. Any name with extension .java
Key:d

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30. The extension name of a Java bytecode file is
a. .java
b. .obj
c. .class
d. .exe
Key:c

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31.	The extension name of a Java source code file is
a.	.java
b.	.obj
c.	.class
d.	.exe
Key:a

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32. Which of the following lines is not a Java comment?
a. /** comments */
b. // comments
c. -- comments
d. /* comments */
e. ** comments **
Key:ce

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33. Which of the following are the reserved words?
a. public
b. static
c. void
d. class
Key:abcd

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34. Every statement in Java ends with ________.
a. a semicolon (;)
b. a comma (,)
c. a period (.)
d. an asterisk (*)
Key:a

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35.	A block is enclosed inside __________.
a.	parentheses
b.	braces
c.	brackets
d.	quotes
Key:b

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Section 1.9 Programming Style and Documentation
36.	Programming style is important, because ______________.
a.	a program may not compile if it has a bad style
b.	good programming style can make a program run faster
c.	good programming style makes a program more readable
d.      good programming style helps reduce programming errors
Key:cd

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37.	Analyze the following code.

I:
public class Test {
  public static void main(String[] args) {
    System.out.println("Welcome to Java!");
  }
}

II: 
public class Test {  public static void main(String[] args) {    System.out.println("Welcome to Java!");  } }

a.	Both I and II can compile and run and display Welcome to Java, but the code in II has a better style than I.
b.	Only the code in I can compile and run and display Welcome to Java.
c.	Only the code in II can compile and run and display Welcome to Java.
d.      Both I and II can compile and run and display Welcome to Java, but the code in I has a better style than II.
Key:d

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38. Which of the following code has the best style?

I:
public class Test {
public static void main(String[] args) {
    System.out.println("Welcome to Java!");
  }
}

II:
public class Test {
    public static void main(String[] args) {
    System.out.println("Welcome to Java!");
  }
}

III:
public class Test {
  public static void main(String[] args) {
  System.out.println("Welcome to Java!");
  }
}

IV:
public class Test {
  public static void main(String[] args) {
    System.out.println("Welcome to Java!");
  }
}

a. I
b. II
c. III
d. IV
Key:d

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Section 1.10 Programming Errors
39.	If a program compiles fine, but it produces incorrect result, then the program suffers  __________.
a.	a compilation error
b.	a runtime error
c.	a logic error
Key:c 

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40.	If you forget to put a closing quotation mark on a string, what kind of error will be raised?
a.	a compile error
b.	a runtime error
c.	a logic error
Key:a This is a syntax error, which will be detected by the compiler.