(Test Bank) Big Java Late Objects

Horstmann, 2

Computer Science & Engineering

Test Bank

2nd Edition

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Test Bank for Big Java Late Objects, The downloadable file consists of 672 pages, and the total size of the file is 5.51 MB. Purchase now only for highly discounted price.

Author(s): Horstmann

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Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 1 Indicate the answer choice that best completes the statement or answers the question. 1. Which of the following refers to a collection of programs that a computer executes? a. source code b. instructions c. assembler d. software 2. Computers are machines that __________________. a. design computer programs b. execute programs c. are imprecise and slow d. carry out a very narrow range of tasks 3. Computer programming is ______________________. a. the act of designing and implementing a computer program b. the storage of data in the form of words and pictures c. the collection of peripheral devices connected to a computer d. the speed with which a computer operates 4. Consider the following statements regarding computers: I. Computers can execute a large number of instructions in a fraction of a second. II. Computer application areas mainly target the research and scientific communities. III. The physical components of a computer constitute its hardware. IV. Unlike humans, a computer never gets bored or exhausted when performing repetitive tasks. Which of the statements are correct? a. I, III, and IV only b. I and III only c. III only d. I, II, and III only 5. Consider the following statements about computer programs: I. Computer programs can be written by someone who has a basic knowledge of operating a computer. II. Computer programs can complete complex tasks quickly. III. Large and complex computer programs are generally written by a group of programmers. IV. Computer programs are composed of extremely primitive operations. Which of the statements are correct? a. I, II, III and IV b. I and IV c. II and III only d. II, III, and IV only 6. Writing a computer game in Java that has graphics, motion, and sound effects _______________________. a. cannot be done in the Java programming language b. is simple because of the power of Java c. requires a team of skilled programmers Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 2 d. is more mundane than most programs 7. The Central Processing Unit is primarily responsible for ______________. a. interconnecting computers that are separated by distance b. ensuring data persists when electrical power is turned off c. performing program control and data processing d. enabling a human user to interact with the computer 8. A single silicon chip made from potentially millions of transistors is called ______________. a. an Optical Disk (such as a DVD) b. secondary Storage c. a Hard Disk d. a Central Processing Unit (CPU) 9. An example of an output device that interfaces between computers and humans is ____________. a. a speaker b. a mouse c. a microphone d. a keyboard 10. An example of an input device that interfaces between computers and humans is ____________. a. a monitor b. a microphone c. a printer d. a speaker 11. Programs that are not running are usually stored _____________________. a. in secondary storage b. on a backup device that is in a different physical location from the computer c. on the computer monitor d. in the CPU’s memory 12. When a program begins to run, ___________________________. a. it is moved from the CPU’s memory to hard disk b. it is moved from DVD to hard disk c. it is moved to the CPU’s memory d. it must be connected to a computer network 13. Which of the following typically provides data persistence without electricity? I. The CPU’s memory II. The hard disk III. Secondary storage a. I, II, and III b. I and III only c. I and II only Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 3 d. II and III only 14. In order for the ENIAC computer to be re-programmed, __________________________. a. vacuum tubes needed to be replaced b. wires needed to be plugged into a different wiring configuration c. the programmer needed to load the program from cards d. the programmer needed to download the new code over the computer network 15. Consider a scenario in which you develop a Java program on a computer that has a Pentium processor. What step should you take to run the same Java program on a computer that has a different processor? a. Load the program in a browser on the computer that has a different processor. b. The compiled Java machine language instructions can be run on any processor that has a Java Virtual Machine. c. You cannot run the program on a computer with a different processor because high-level programming languages are machine dependent. d. Develop the same program again on the computer that has a different processor and recompile the program. 16. High -level programming languages _________________________. a. are made up primarily of ones and zeros b. are independent of the underlying hardware c. use syntax that is close to the underlying hardware’s instruction set d. are not standardized 17. Which one of the following translates high-level descriptions into machine code? a. assembler b. compiler c. editor d. linker 18. Computer scientists have devised __________________ that allow programmers to describe tasks in words that are closer to the syntax of the problems being solved. a. compilers b. embedded systems c. high-level programming languages d. machine instructions 19. Small applications written in the Java programming language that can be located anywhere on the Internet are called __________. a. applets b. compilers c. embedded systems d. virtual machines 20. What is one of the benefits of using a high-level programming language like Java? a. Problems solved in a high-level language are independent of the underlying computer hardware. Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 4 b. Statements in the high-level language are just like English. c. Its syntax is very similar to the hardware instruction set. d. No tools other than a text editor are required for programming. 21. Because Java was designed for the Internet, which two of its attributes make it suitable for beginning programmers? a. Efficiency and security b. Safety and portability c. Safety and security d. Efficiency and portability 22. In order to run Java programs on a computer, the computer needs to have software called a(n) __________. a. assembler b. virtual machine c. windows d. debugger 23. In order to translate a Java program to a class file, the computer needs to have software called a(n) _______________. a. assembler b. virtual machine c. compiler d. debugger 24. A Java virtual machine is ____________. a. firmware b. hardware c. applet d. software 25. The language developed by Sun Microsystems that became the Java programming language was originally designed to be simple, secure, and _______________. a. environmentally friendly, or "green" b. usable for many different processor types c. available over the Internet d. easy to program on a phone 26. The term applet refers to _________________. a. a Java program that runs as a C++ program b. any Java program c. a Java program that runs within a web browser d. a Java program that runs within an Integrated Development Environment (IDE) 27. Programmers have embraced Java over its closest rival, C++, mainly because _____________. a. it is easier to use b. it is easier to debug Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 5 c. it is cheaper to use d. most computers only understand Java 28. How does Java achieve portability? a. Java programs are compiled to instructions for a virtual machine. b. Java programs must be re-compiled on each platform where they are to run. c. Java programs are interpreted. d. Java programs are compiled to instructions in the C++ programming language. 29. A Java Virtual Machine is _______________________. a. a theoretical machine to help understand the computational complexity of algorithms b. a kind of computer hardware that is embedded into the CPUs of all computers using Java c. a library package that extends the capability of the Java programming language d. a program that simulates a real CPU 30. The Java programming language is itself relatively simple, but also contains a vast set of _______________. a. cross -platform scripting languages b. syntactical variations c. library packages d. program templates 31. A Java class with the name Printer has to be saved using the source file name: a. Printer.txt b. printer.txt c. Printer.java d. printer.java 32. An integrated development environment (IDE) bundles tools for programming into a unified application. What kinds of tools are usually included? a. a web browser b. source files and class files c. an editor and a compiler d. presentation tools 33. What is the difference between an editor and a compiler? a. An editor allows program files to be written and stored; a compiler converts program files into an executable program. b. An editor converts program files into an executable program; a compiler allows program files to be written and stored. c. An editor allows program files to be written and stored; a compiler produces an indexed database of terms and keywords. d. An editor allows program files to be written and stored; a compiler produces an organized list of files. 34. Suppose you examine a simple Java program and the first line is public class HelloPrinter . Is this the same thing in Java as the line public class helloprinter ? Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 6 a. No, because helloprinter is misspelled, the Java compiler will reject it. b. Yes, because these Java symbols both have the same letters, they are considered to be the same c. No, because Java is case-sensitive, these are considered to be completely distinct. d. Yes, because all Java symbols must have exactly twelve characters. 35. Consider the following statements about folders and your integrated development environment (IDE): I. Hierarchical folders help to organize a project. II. Folders are a way to visualize the layout of a file system. III. Folders make it impossible to lose or accidentally delete a file. Which statements are correct? a. I only b. III only c. I and II only d. I, II, and III 36. The source code for a Java program is stored in a file ________________. a. that ends with a .class suffix b. that can have any valid file name c. that has no suffix d. that ends with a .java suffix 37. A Java "class" file _______________________. a. contains instructions for the Java virtual machine b. contains Java source code c. is the translation of the Java source code into C++ d. is an internal file created by the Integrated Development Environment (IDE) 38. Which of the following statements regarding backup strategies for Java files are true? I. You should back up your projects often to prevent loss of valuable work. II. You should check your backups only in case of loss of data. III. You should pay attention to the backup direction. a. I and II only b. I, II, and III c. II and III only d. I and III only 39. Which pointers about backing up your Java projects are important? I. Check your backups once in a while. II. Rely on the Java programming language's built-in back up system. III. Back up often. a. I, II, and III b. I and II only c. II and III only d. I and III only Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 7 40. Every Java program consists of one or more ___________. a. classes b. strings c. System.out.println statements d. values (arguments) 41. Characters that are grouped together between double quotes (quotation marks) in Java are called _____________. a. syntax b. strings c. reserved words d. symbols 42. Every statement in Java must be terminated with ____________. a. the semi -colon character ; b. System.out.println() c. a carriage return d. an escape sequence 43. These two lines of code do not produce the same output. Why? System.out.println(7 + 3); System.out.println("7 + 3"); a. The lack of escape characters causes the expressions to be treated differently. b. In fact, the two statements do produce the same output. c. The quotes cause the second expression to be treated as a string. d. Arithmetic calculations cannot take place within the println method call. 44. What is the output from this code snippet? System.out.print("The sum is "); System.out.println("7 + 3"); a. The sum is 21 b. The sum is 4 c. The sum is 10 d. The sum is 7 + 3 45. Which of the following symbols is used to terminate a Java program statement? a. colon b. single quote c. semicolon d. period 46. Which of the following statements is valid with respect to the usage of a semicolon in Java? Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 8 a. You cannot use a semicolon to terminate the System.out.print statement. b. A semicolon is used to terminate the public class statement. c. A semicolon is used to denote the end of a statement. d. You cannot put a semicolon within double quotation marks. 47. Which of the following statements is true with respect to the main method in Java? a. A semicolon is required after the closing curly braces in the main method. b. Every Java application must have a main method. c. The opening and closing parentheses after the method name main are optional. d. A semicolon is required after the statement public static void main() 48. Which statement starts the declaration of a class in Java? a. Java class b. public class Classname c. System.out.println("Hello, World!"); d. public static void main(String[] args) 49. Which Java statement prints a blank line? a. System.out.println(); b. System.out.print(); c. public static void main(String[] args) d. System.out.Println(); 50. Which Java statement does not contain an error? a. System.out.print(; b. System.out.print() c. System.out.printl(); d. System.out.println(); 51. What is the output of the following code snippet? System.out.print(4 + 4); System.out.print(12); a. 4412 b. 4 + 412 c. 20 d. 812 52. The Java statement public static void main(String[] args) declares a ____________. a. class b. constant c. variable d. method Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 9 53. Which of the following statements must you include in a Java class that can be executed by the virtual machine? a. // Hello b. System.out.println(); c. public static void main(String[] args) d. return 0; 54. What is the output of the following code snippet? System.out.print("Hello"); System.out.println("Good Day!"); a. Hello Good Day! b. Hello Good Day! c. HelloGood Day! d. HelloGoodDay! 55. Which one of the following code snippets compiles without errors and displays the output “Hello Good Day!” on the screen? a. System.out.print("Hello ") System.out.println(Good Day!"); b. System.out.print("Hello ); System.out.println("Good Day!"); c. System.out.print("Hello"); System.out.println("Good Day!") d. System.out.print("Hello "); System.out.println("Good Day!"); 56. What is the output of the following code snippet? public class PrintIt { public static void main(String[] args) { System.out.println("4 * 4" + 12); } } a. 4 * 412 b. 4412 c. 1612 d. 28 57. Which statements are true? I. In Java, a file can contain at most one public class. II. The word public denotes that the class is usable by the "public". III. Every Java program must have a main method. Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 10 a. I, II, and III b. I and III only c. I and II only d. II and III only 58. The technical term for the values that a method needs in order to carry out its task is an argument. When there is more than one argument needed by a method, they are __________________. a. separated by semicolons b. separated by spaces c. separated by commas d. merged into a single variable 59. In Java, if you want the compiler to interpret what you type as program instructions, you must __________________. a. write the instructions in all capital letters b. write correct Java statements separated by the semicolon c. enclose those instructions within quotation marks d. start the line that you type with the symbols // 60. What kind of error is it when your program has a syntax error? a. compile -time error b. logic error c. exception d. run-time error 61. When a compiler finds a syntax error in a program, what happens? a. The compiler requests input from the user before it will continue. b. The compiler stops immediately. c. The compiler continues and may report about other errors but does not produce a Java class file. d. The compiler goes ahead and produces a Java class file, but leaves out the statement where there was an error. 62. What kind of error is created by the following code snippet? System.outt.println("Hello"); a. Logic error: the program will run until it comes to this statement b. Syntax error: the program will not compile c. No error: the code is correct d. Exception: the statement will generate an exception 63. What kind of error is created by the following code snippet? System.out.print("The sum of 8 and 12 is "); System.out.println(8 * 12); a. Exception: the statement will generate an exception Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 11 b. Syntax error: the code will not compile c. No error: the code is correct d. Logic error: the program does not produce the desired result 64. What is a logic error? a. An error that occurs when a program is running because, for example, the wrong operator was used. b. An error introduced by the compiler when it guesses at how to fix a syntax error. c. An error in a statement that does not conform to the syntax of the programming language. d. An error in the hardware from overheating. 65. How do programmers find exceptions and run-time errors? a. Re-compiling using different symbols b. Using the compiler c. Testing by running the program with a variety of input values d. Carefully reading over the program code 66. The programmer, not the compiler, is responsible for testing a program to identify _________________. a. run-time errors b. undefined symbols c. syntax errors d. compile -time errors 67. Which one of the following errors represents a part of a program that is incorrect according to the rules of the programming language? a. run-time errors b. out-of-memory errors c. syntax errors d. logic errors 68. Who or what is responsible for inspecting and testing the program to guard against logic errors? a. end-user b. Integrated Development Environment c. compiler d. programmer 69. While developing a program, the programmer adds the discount amount to the total due instead of subtracting it. What type of an error is this? a. hardware error b. compile -time error c. logic error d. syntax error 70. In Java, the following statement ____________________. Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 12 System.out.print("hello");;; a. seems like it should print out "hello" but doesn't b. asks the user to enter a value and stores it in the variable "hello" c. is a syntax error d. is a legal statement 71. Sometimes errors throw the compiler off track because __________________. a. the compiler must be trained by your programming style b. it cannot tell which language you are writing without a network connection c. the compiler does not understand quotation marks d. the compiler does not give up when it finds the first error 72. Some run-time errors are so severe that they generate ______________. a. the loss of your source code file b. an exception c. a syntax error d. an email to your account 73. During program development, errors are __________________. a. very rare b. automatically tracked by the Integrated Development Environment (IDE) c. unavoidable d. prevented by the Java virtual machine 74. If you misspell a word in your Java program, which of the following statements are true? I. the program will not compile II. the program may compile, but not run III. the program may compile and run but still have a logic error a. I, II, and III b. I and III only c. II and III only d. I and II only 75. A sequence of steps that is unambiguous, executable, and terminating is called _______________. a. an algorithm b. a logarithm c. a programming task d. pseudocode 76. You have been asked to develop an algorithm to calculate the total cost of a purchase order that contains several T shirts. The cost of each T shirt and the tax rate is known. The standard shipping charge for the entire order is $5.75, and the special delivery charge is $23.65. In addition, there is no tax on the shipping cost. Which of the follo wing is the correct pseudocode for the required algorithm? Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 13 a. For each T shirt on the purchase order Order cost = order cost + T shirt cost Total purchase order cost = order cost + tax rate + 5.75 b. If standard shipping Shipping cost = 5.75 Else Shipping cost = 23.65 For each T shirt on the purchase order Order cost = order cost + T shirt cost + shipping cost Total purchase order cost = order cost * tax rate c. If special delivery Shipping cost = 5.75 Else Shipping cost = 23.65 For each T shirt on the purchase order Order cost = order cost + T shirt cost Total purchase order cost = order cost * tax rate + shipping cost d. For each T shirt on the purchase order Order cost = order cost + T shirt cost If standard shipping Shipping cost = 5.75 Else Shipping cost = 23.65 Total purchase order cost = order cost + order cost * tax rate + shipping cost 77. What is the purpose of the following algorithm, written in pseudocode? num = 0 Repeat the following steps 10 times Input var1 If var1 > num Num = var1 Print num a. To search for a particular number among 10 numbers b. To find the smallest among 10 numbers c. To print out the 10 numbers d. To find the highest among 10 numbers 78. Consider a situation where you are buying books online. The bookseller charges $19.95 as the price per book and $4.95 as the handling cost for up to three books. For every book purchased in addition to three books, there is a handling charge of $1.50. In addition, there is a 7 percent tax on the cost of the books but not on the handlingCharges . Assuming that numBooks represents the number of books you are purchasing, which of the following is the correct algorithm for calculating the total cost of your purchase? a. Total charge for books = 19.95 * numBooks Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 14 Tax on the books = numBooks * .07 if (books < 3) then handlingCharges = 4.95 else handlingCharges = 4.95 + 1.50 * (numBooks – 3) Total cost of order = total charge for books + tax + handlingCharges b. Total charge for books = 19.95 * numBooks Tax on the books = total charge for books * .07 if (books = 3) then handlingCharges = 4.95 else handlingCharges = 1.50 * numBooks Total cost of order = total charge for books + tax + handlingCharges c. Total charge for books = 19.95 * numBooks Tax on the books = total charge for books * .07 if (books <= 3) then handlingCharges = 4.95 else handlingCharges = 4.95 + 1.50 * (numBooks – 3) Total cost of order = total charge for books + tax + handlingCharges d. Total charge for books = 19.95 * numBooks Tax on the books = numBooks * .7 if (books <= 3) then handlingCharges = 4.95 else handlingCharges = 1.50 * numBooks Total cost of order = total charge for books + tax + handlingCharges 79. Imagine you are planning to buy a new cell phone. You are considering two cell phones. These cell phones have different purchase prices. Each mobile service provider charges a different rate for each minute that the cell phone is used. To determine which cell phone is the better buy, you need to develop an algorithm to calculate the total cost of purchasing and using each cell phone. What are all the inputs needed for this algorithm? a. The cost of each cell phone and the number of minutes provided with each cell phone b. The cost of each cell phone, the rate per minute for each cell phone, and the number of minutes you would use the cell phone c. The cost of each cell phone, the rate per minute for each cell phone, and the number of minutes provided with each cell phone d. The cost of each cell phone and the rate for each minute for each cell phone 80. Which one of the following methodologies is a sequence of steps formulated in English for solving a problem? a. Pseudocode b. Terminations c. Flowcharts d. Algorithms 81. Imagine you are developing an algorithm to calculate the total cost of a purchase order that contains several items. The cost of each item and the tax rate is known. The standard shipping charge for the entire order is $4.95, and the special delivery charge is $19.95. In addition, there is no tax on the shipping cost. Which of the following is the correct pseudocode for the required algorithm? a. If special delivery Shipping cost = 4.95 Else Shipping cost = 19.95 For each item on the purchase order: Name: Class: Date: bjlo-2-ch01 Powered by Cognero Page 15 Order cost = order cost + item cost Total purchase order cost = order cost * tax rate + shipping cost b. If standard shipping Shipping cost = 4.95 Else Shipping cost = 19.95 For each item on the purchase order: Order cost = order cost + item cost + shipping cost Total purchase order cost = order cost * tax rate c. For each item on the purchase order: Order cost = order cost + item cost If standard shipping Shipping cost = 4.95 Else Shipping cost = 19.95 Total purchase order cost = order cost + order cost * tax rate + shipping cost d. For each item on the purchase order: Order cost = order cost + item cost Total purchase order cost = order cost + tax rate + 4.95 82. Evaluate the pseudocode below to calculate the payment (pmt) with the following test values: The total number of hours worked (workingHours ) = 50 The rate paid for hourly work (rate ) = 10 Input workingHours Input rate pmt = workingHours * rate If working_hours > 45 extraHours = workingHours – 45 extraPmt = extraHours * rate * 2 pmt = pmt + extraPmt Output pmt a. 500 b. 400 c. 600 d. 1,000 83. What is the purpose of the following algorithm? someNum = 0 Repeat the following steps 50 times Input variable1 if variable1 > someNum