Lessons+on+Java

Read the powerpoint materials and be able to answer the questions below.

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 //2// __________ is the brain of a computer.

A. Hardware B. CPU C. Memory D. Disk //3// The speed of the CPU is measured in __________.

A. megabytes B. gigabytes C. megahertz D. gigahertz //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. //5// One byte has ________ bits.

A. 4 B. 8 C. 12 D. 16 //6// Which of the following are storage devices?

A. floppy disk B. hard disk C. flash stick D. CD-ROM //7// ____________ is a device to connect a computer to a local area network (LAN).

A. Regular modem B. DSL C. Cable modem D. NIC Section 1.3 Programs //8// ____________ are instructions to the computer.

A. Hardware B. Software C. Programs D. Keyboards //9// Computer can execute the code in ____________.

A. machine language B. assembly language C. high-level language D. none of the above //10// ___________ translates high-level language program into machine language program.

A. An assembler B. A compiler C. CPU D. The operating system Section 1.4 Operating Systems //11// ____________ is an operating system.

A. Java B. C++ C. Windows XP D. Visual Basic E. Ada //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 Section 1.5 Java, World Wide Web, and Beyond //13// Java was developed by ____________.

A. Sun Microsystems B. Microsoft C. Oracle D. IBM E. Cisco Systems //14// Java ___________ can run from a Web browser.

A. applications B. applets C. servlets D. Micro Edition programs //15// ________ is an object-oriented programming language.

A. Java B. C++ C. C D. C# E. Pascal //16// ________ is interpreted.

A. Java B. C++ C. C D. Ada E. Pascal //17// ________ is Architecture-Neutral.

A. Java B. C++ C. C D. Ada E. Pascal 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 //19// ________ contains predefined classes and interfaces for developing Java programs.

A. Java language specification B. Java API C. Java JDK D. Java IDE //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 //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 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) //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. //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.print('Welcome to Java'); E. System.out.print("Welcome to Java"); 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 //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 //27// Java compiler translates Java source code into _________.

A. Java bytecode B. machine code C. assembly code D. another high-level language code //28// _________ is a software that interprets Java bytecode.

A. Java virtual machine B. Java compiler C. Java debugger D. Java API //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 //30// The extension name of a Java bytecode file is

A. .java B. .obj C. .class D. .exe //31// The extension name of a Java source code file is

A. .java B. .obj C. .class D. .exe //32// Which of the following lines is not a Java comment?

A. /** comments */ B. // comments C. -- comments D. /* comments */ E. ** comments ** //33// Which of the following are the reserved words?

A. public B. static C. void D. class //34// Every statement in Java ends with ________.

A. a semicolon B. a comma C. a period (.) D. an asterisk (*) //35// A block is enclosed inside __________.

A. parentheses B. braces C. brackets D. quotes Section 1.9 (GUI) Displaying Text in a Message Dialog Box //36// The __________ method displays a message dialog box.

A. JOptionPane.showMessage(null, "Welcome to Java!", "Example 1.2 Output", JOptionPane.INFORMATION_MESSAGE); B. JOptionPane.displayMessage(null, "Welcome to Java!", "Example 1.2 Output", JOptionPane.INFORMATION_MESSAGE); C. JOptionPane.displayMessageDialog(null, "Welcome to Java!", "Example 1.2 Output", JOptionPane.INFORMATION_MESSAGE); D. JOptionPane.showMessageDialog(null, "Welcome to Java!", "Example 1.2 Output", JOptionPane.INFORMATION_MESSAGE); E. JOptionPane.showMessageDialog(null, "Welcome to Java!"); //37// To use JOptionPane in your program, you may import it using: A. import javax.swing.JOptionPane; B. import javax.swing.*; C. import javax.*; D. import javax.*.JOptionPane;