Chapter 1 Introduction to Computers, Programs, and Java 1. A Java program with more than one class will run. a. True b. False 2. A Java program can have more than one class but all the classes must be public. a. True b. False 3. Considering the program code below. What possible class or classes will be created when the program is compiled? a. class A only b. classes A and C c. classes A,B and C d. There will be a compilation error because class C is declared public 4. the following words to the best appropriate description. Words: a) Dial-up Modem b) DSL c) Cable Modem d) NIC e) LAN stands for Network Interface Card, which is a device that connects the computer to the Internet. stands for Local Area Network, which connects computers within a limited area such as a school, a home, or an office. uses a phone line to dial a phone number to connect to the Internet. stands for Digital Subscriber Line that directly connects a computer to the Internet through a phone without having to dial up a number. uses a cable TV line to connect to the Internet. 5. Which of these components interconnects computer subsystems? a. Bus b. Keyboard c. Data d. Network Cable 6. Identify the items that are intangible parts of the computer system. a. Motherboard b. Disk c. Operating system d. Application program 7. The unit that coordinates the actions of other units of the computer is a. Control unit b. Arithmetic unit c. Logic unit d. Peripheral unit 8. is the brain of a computer. a. Hardware b. CPU c. Memory d. Disk 9. The intermediate code from JVM is called a. Byte code b. Bit code c. Machine code d. Assembly code 10. Java use the following translator in executing translating its source code to object code. a. Compiler and Interpreter b. Compiler only c. Interpreter only d. Assembler only 11. Match the following words to its best description Word: a) Machine Language b) Assembly Language c) High-Level Language d) Source Code e) Interpreter f) Assembler g) Compiler is English-like, easy to learn and use. uses short descriptive word to represent each of the machine-language instructions. is computer's native language. translates the entire source code into a machine-code file. processes one statement at a time, translates it to the machine code, and executes it. is a program written in a high-level programming language. is a program that translates assembly-language code into machine code. 12. The speed of the CPU may be measured in a. megabytes b. gigabytes c. megahertz d. gigahertz 13. 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 14. Two byte has bits. a. 4 b. 8 c. 12 d. 16 15. One gigabyte is approximately bytes. a. 1 million b. 10 million c. 1 billion d. 1 trillion 16. A program and its data must be moved into the computer's before they can be executed by the CPU. a. memory b. hard disk c. CPU d. CD-ROM 17. A computer's is volatile; that is, any information stored in it is lost when the system's power is turned off. a. Memory b. hard disk c. flash stick d. CD-ROM 18. Which of the following are storage devices? a. portable disk b. hard disk c. flash stick d. CD-ROM 19. The specifies the number of pixels in horizontal and vertical dimensions of the display device. a. screen resolution b. pixel c. dot pitch d. monitor 20. is a device to connect a computer to a local area network (LAN). a. Regular modem b. DSL c. Cable modem d. NIC 21. are instructions to the computer. a. Hardware b. Software c. Programs d. Keyboards 22. Computer can execute the code in a. machine language b. assembly language c. high-level language d. none of the above 23. translates high-level language program into machine language program. a. An assembler b. A compiler c. CPU 23. is an operating system. a. Java b. C++ c. Windows d. Visual Basic e. Ada 24. 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 25. 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 26. is not an object-oriented programming language. a. Java b. C++ c. C d. CH e. Python 27. is interpreted. a. Java b. C++ c. C d. Ada e. Pascal 28. is architecture-neutral. a. Java b. C++ c. C d. Ada e. Pascal 29. is a technical definition of the language that includes the syntax and semantics of the Java programming. a. Java language specification b. Java API c. Java JDK d. Java IDE 30. contains predefined classes and interfaces for developing Java programs. a. dava language specification b. Java AP1 c. Java JDK d. Java IDE 31. 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 32. _provides an integrated development environment (IDE) for rapidly developing Java programs. a. Java language specification b. Java API c. Java JDK d. Java IDE 33. The main method header is written as: 3. 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) 34. 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. 35. 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 ava"); 36. The JDK command to just compile a class (not run) in the file Test.java is a. java Test b. java Test.java c. javac Test.java d. javac Test e. JAVAC Test.java 37. 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 38. Java compiler translates Java source code into a. Java bytecode b. machine code c. assembly code d. another high-level language code 39. is a software that interprets Java bytecode. a. Java virtual machine b. Java compiler c. Java debugger d. Java API 40. Suppose you define a Java class as follows, the source code should be stored in a file named public class Test \{ \} a. Test.class b. Test.doc c. Test.txt d. Test.java e. Any name with extension .java 41. The extension name of a Java bytecode file is a. java b. .obj c. class d. exe 42. The extension name of a Java source code file is a. .java b. .obj c. class d. exe 43. Which of the following lines is not a Java comment? a. / comments / b. // comments c. - comments d. // comments / e. ** comments 44. Which of the following are the reserved words? a. Public b. Static c. Void d. class 45. Every statement in Java ends with a. a semicolon (i) b. a comma (,) c. a period (.) d. an asterisk () 46. A block is enclosed inside a. Parentheses b. Braces c. Brackets d. Quotes 47. 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 48. 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.printIn("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 Both I and II are the same except the format is different. Format is a readability issue only. 49. 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. 1 b. II c. III d. IV 50. If a program compiles fine, but it produces incorrect result, then the program suffers a. a compile error b. a runtime error c. a logic error 51. 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