Java Test 1, Ch1
A. Sun Microsystems
Java was developed by ____________. A. Sun Microsystems B. Microsoft C. Oracle D. IBM E. Cisco Systems
C. megahertz D. gigahertz
The speed of the CPU is measured in __________. A. megabytes B. gigabytes C. megahertz D. gigahertz
C. -- comments E. ** comments **
Which of the following lines is not a Java comment? A. /** comments */ B. // comments C. -- comments D. /* comments */ E. ** comments **
B. applets
Java ___________ can run from a Web browser. A. applications B. applets C. servlets D. Micro Edition programs
C. javac Test.java
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
D. JOptionPane.showMessageDialog(null, "Welcome to Java!", "Example 1.2 Output", JOptionPane.INFORMATION_MESSAGE); E. JOptionPane.showMessageDialog(null, "Welcome to Java!");
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!");
A. .java
The extension name of a Java source code file is A. .java B. .obj C. .class D. .exe
C. public static void main(String[] args)
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)
A. public B. static C. void D. class
Which of the following are the reserved words? A. public B. static C. void D. class
B. braces
A block is enclosed inside __________. A. parentheses B. braces C. brackets D. quotes
A. a semicolon (;)
Every statement in Java ends with ________. A. a semicolon (;) B. a comma (,) C. a period (.) D. an asterisk (*)
D. Test.java
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
C. .class
The extension name of a Java bytecode file is A. .java B. .obj C. .class D. .exe
A. java ByteCode
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
C. Java JDK
________ 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
B. Java API
________ contains predefined classes and interfaces for developing Java programs. A. Java language specification B. Java API C. Java JDK D. Java IDE
A. Java
________ is Architecture-Neutral. A. Java B. C++ C. C D. Ada E. Pascal
A. Java B. C++ D. C#
________ is an object-oriented programming language. A. Java B. C++ C. C D. C# E. Pascal
A. import javax.swing.JOptionPane; B. import javax.swing.*;
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;
A. floppy disk B. hard disk C. flash stick D. CD-ROM
Which of the following are storage devices? A. floppy disk B. hard disk C. flash stick D. CD-ROM
B. System.out.println("Welcome to Java"); E. System.out.print("Welcome to Java");
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");
B. Every statement in a program must end with a semicolon.
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.
B. because digital devices have two stable states and it is natural to use one state for 0 and the other for 1.
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.
A. Java language specification
________ 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
A. Java
________ is interpreted. A. Java B. C++ C. C D. Ada E. Pascal
A. Hardware
________ is the physical aspect of the computer that can be seen. A. Hardware B. Software C. Operating system D. Application program
B. Java API
________ 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
A. Java virtual machine
_________ is a software that interprets Java bytecode. A. Java virtual machine B. Java compiler C. Java debugger D. Java API
B. CPU
__________ is the brain of a computer. A. Hardware B. CPU C. Memory D. Disk
B. A compiler
___________ translates high-level language program into machine language program. A. An assembler B. A compiler C. CPU D. The operating system
B. Software C. Programs
____________ are instructions to the computer. A. Hardware B. Software C. Programs D. Keyboards
D. NIC
____________ is a device to connect a computer to a local area network (LAN). A. Regular modem B. DSL C. Cable modem D. NIC
C. Windows XP
____________ is an operating system. A. Java B. C++ C. Windows XP D. Visual Basic E. Ada
A. Operating system
_____________ 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
A. machine language
Computer can execute the code in ____________. A. machine language B. assembly language C. high-level language D. none of the above
A. Java bytecode
Java compiler translates Java source code into _________. A. Java bytecode B. machine code C. assembly code D. another high-level language code
B. 8
One byte has ________ bits. A. 4 B. 8 C. 12 D. 16
