Chapter 1 Introduction to Computers and Java Answers

Starting Out with Java: From Control Structures through Objects 8e (Gaddis) Chapter 1 Introduction to Computers and Java TRUE/FALSE 1. Logical errors are mistakes that cause the program to produce erroneous results. ANS: T 2. The Java Virtual Machine is a program that reads Java byte code instructions and executes them as they are read. ANS: T 3. Colons are used to indicate the end of a Java statement. ANS: F 4. Compiled byte code is also called source code. ANS: F 5. Application software refers to programs that make the computer useful to the user. ANS: T 6. Each byte is assigned a unique number known as an address. ANS: T 7. Encapsulation refers to the combining of data and code into a single object. ANS: T 8. Java source files end with the .class extension. ANS: F 9. A procedure is a set of programming language statements that, together, perform a specific task. ANS: T 10. A solid-state drive has no moving parts and operates faster than a traditional disk drive. ANS: T 11. The computer is a tool used by so many professionals that it cannot be easily categorized. ANS: T 12. Without programmers, the users of computers would have no software, and, without software, computers would not be able to do anything. ANS: T 13. The contents of a variable cannot be changed while the program is running. ANS: F 14. Java source files end with the .class extension. ANS: F 15. When an object's internal data is hidden from outside code and access to that data is retricted to the object's methods, the data is protected from accidental corruption. ANS: T MULTIPLE CHOICE 1. While __________ is centered on creating procedures, __________ is centered on creating objects. a. b. c. d. procedural programming, object-oriented programming object-oriented programming, procedural programming routine programming, method programming procedural programming, class programming ANS: A 2. RAM is usually a. b. c. d. an input/output device a volatile type of memory, used for temporary storage secondary storage a static type of memory, used for permanent storage ANS: B 3. The two primary methods of programming in use today are a. b. c. d. procedural and object-oriented hardware and software practical and theoretical desktop and mobile ANS: A 4. Validating the results of a program is important to a. b. c. d. correct runtime errors make sure the program solves the original problem create a model of the program correct syntax error ANS: B 5. Software refers to a. b. c. d. programs the physical components a computer is made of firmware data stored in RAM ANS: A 6. An object typically hides its data but allows outside code access to a. b. c. d. the pseudocode the methods that operate on the data private data members the data files ANS: B 7. Variables are a. symbolic names made up by the programmer and once created, their values cannot be changed b. operators that perform operations on one or more operands c. symbolic names made up by the programmer that represent memory locations d. reserved words ANS: C 8. __________ refers to the physical components that a computer is made of. a. Input b. Main memory c. Control unit d. Hardware ANS: D 9. A characteristic of __________ is that only an object's methods are able to directly access and make changes to an object's data. a. classes b. procedures c. data hiding d. component reusability ANS: C 10. Because Java byte code is the same on all computers, compiled Java programs a. b. c. d. are nonexistent must be re-compiled for each different machine before they can be run are highly portable cannot run on computers with different operating systems ANS: C 11. A cross between human language and a programming language is called a. a compiler b. pseudocode c. the Java Virtual Machine d. the Java language ANS: B 12. Byte code instructions are a. b. c. d. machine code instructions syntax errors read and interpreted by the JVM another name for source code ANS: C 13. One type of design tool used by programmers when creating a model of a program is a. the ALU b. byte code c. syntax d. pseudocode ANS: D 14. Keywords are a. b. c. d. symbols or words that perform operations on one or more operands words or characters representing values that are defined by the programmer the data names in your program words that have a special meaning in the programming language ANS: D 15. Computers can do many different jobs because they are a. programmable b. reliable c. automated d. electronic ANS: A 16. A(n) __________ is a software entity that contains data and procedures. a. object b. program c. class d. method ANS: A 17. Application software refers to a. b. c. d. the programs that make the computer useful to the user the operating system keywords pseudocode ANS: A 18. The end of a Java statement is indicated by a ________. a. bracket (}) b. asterisk (*) c. semicolon (;) d. colon (:) ANS: C 19. What is syntax? a. b. c. d. the rules that must be followed when writing a program the words that have a special meaning in the programming language the symbols or words that perform operations in a program the words or characters that are defined by the programmer ANS: A 20. A set of programming language statements that perform a specific task is a(n) a. pseudocode chart b. source code c. object d. procedure ANS: D 21. The central processing unit (CPU) consists of two parts which are a. b. c. d. the input and output devices the control unit and the arithmetic and logic unit (ALU) the control unit and main memory the arithmetic and logic unit (ALU) and main memory ANS: B 22. There are __________ bits in a byte. a. 4 b. 8 c. 16 d. 32 ANS: B 23. A runtime error is usually the result of a. a logical error b. a syntax error c. a compiler error d. bad data ANS: A 24. A(n) __________ is used to write computer programs. a. pseudocode document b. operating system c. application d. programming language ANS: D 25. __________ refers to the physical components that a computer is made of. a. The device b. Hardware ANS: B c. Software d. The system 26. A computer program is a. b. c. d. the same as main memory only used for desktop computers a set of instructions that allow the computer to solve a problem or perform a task another name for an operating system ANS: C 27. Which of the following is not part of the programming process? a. b. c. d. defining and modeling the problem entering code and compiling it testing and debugging All of these are parts of the programming process ANS: D 28. Computer programming is a. an art b. a science c. both of the above d. neither of the above ANS: C 29. The original name for Java was a. JavaScript b. HotJava c. Elm d. Oak ANS: D 30. A program is a sequence of instructions stored in a. the CPU c. software b. the computer's memory d. firmware ANS: B 31. Which of the following is not one of the major components of a typical computer system? a. the CPU b. input/output devices c. main memory d. secondary storage devices e. All of the above are major components ANS: E 32. Byte code instructions are a. another name for source code b. syntax errors c. machine code instructions d. read and interpreted by the JVM ANS: D 33. Which of the following is a software entity that contains data and procedures? a. a method c. a class b. an object d. a program ANS: B 34. Each different type of CPU has its own a. syntax b. firmware c. machine language d. software ANS: C 35. Internally, the central processing unit (CPU) consists of two parts which are __________ a. the control unit and the arithmetic/logic unit (ALU) b. the control unit and main memory c. the arithmetic/logic unit (ALU) and main memory d. the input and output devices ANS: A 36. Java was developed by a. Microsoft b. IBM c. Sun Microsystems d. Hewlett-Packard ANS: C 37. Which of the following will compile a program called ReadIt? a. java ReadIt.java c. javac ReadIt.java b. java ReadIt.javac d. javac ReadIt.javac ANS: C 38. Which of the following will run the compiled program called ReadIt? a. java ReadIt.java c. run ReadIt b. java ReadIt d. go ReadIt ANS: B