Test Bank for Starting Out with C++ from Control Structures to Objects, 9th Edition

Starting Out with C++ from Control Structures to Objects, 9e (Gaddis) Chapter 2 Introduction to C++ TRUE/FALSE 1. The preprocessor reads a program before it is compiled and only executes those lines beginning with # symbol. ANS: T 2. Because C++ is case-sensitive, all programs must have a function called main or Main. ANS: F 3. In programming, the terms “line” and “statement” always mean the same thing. ANS: F 4. In C++, key words are written in all lowercase letters. ANS: T 5. The preprocessor executes after the compiler. ANS: F 6. A value is stored in a variable with an assignment statement. ANS: T 7. Programming style refers to the way a programmer uses elements such as identifiers, spaces, and blank lines. ANS: T 8. When typing your source code into the computer, you should be careful since most of your C++ instructions, header files, and variable names are case sensitive. ANS: T 9. In C++ you are required to name your variables so they indicate the purpose they will be used for. ANS: F 10. Escape sequences are always stored internally as a single character. ANS: T 11. Floating point constants are normally stored in memory as doubles. ANS: T 12. C++ does not have a built-in data type for storing strings of data. ANS: T 13. A named constant is like a variable, but it its content cannot be changed while the program is running. ANS: T 14. C++ 11 introduced an alternative way to define variables, using the template key word and an initialization value. ANS: F MULTIPLE CHOICE 1. In a C++ program, two slash marks (//) indicate a. b. c. d. e. the end of a statement the beginning of a comment the end of a program the beginning of a block of code None of these ANS: B 2. A statement that starts with a hashtag (or pound) symbol (#) is called a a. b. c. d. e. comment function preprocessor directive header file None of these ANS: C 3. For every opening brace ({) in a C++ program, there must be a a. b. c. d. e. string literal function comment closing brace None of these ANS: D 4. The __________ is(are) used to display information on the computer’s screen. a. opening and closing braces b. opening and closing quotation marks c. cout object d. backslash e. None of these ANS: C 5. In the following statement, the characters Hello! are a(n) cout << "Hello!"; a. b. c. d. e. variable string literal comment object None of these ANS: B 6. The __________ causes the content of another file to be inserted into a program. a. b. c. d. e. cout object double slash (//) #include directive semicolon (;) None of these ANS: C 7. Which of the following must be included in any program that uses the cout object? a. b. c. d. e. opening and closing braces the header file iostream comments a namespace None of these ANS: B 8. Character constants in C++ are always enclosed in a. b. c. d. e. brackets ( ) braces ( { } ) single quotation marks ( ‘ ‘ ) pound sign and semicolon ( # ; ) Any of these ANS: C 9. Every complete C++ program must have a a. b. c. d. e. comment function named main symbolic constant cout statement None of these ANS: B 10. In a cout statement, which of the following will advance the output position to the beginning of the next line? a. b. c. d. e. endl or n end1 or /n n or t t or b \ or ‘ ANS: A 11. What will the following code display? cout << "Monday"; cout << "Tuesday"; cout << "Wednesday"; a. Monday Tuesday Wednesday b. Monday Tuesday Wednesday c. MondayTuesdayWednesday d. "Monday" "Tuesday" "Wednesday" e. "Monday" "Tuesday" "Wednesday" ANS: C 12. What will the following code display? int number = 23; cout << "The number is " << "number" << endl; a. b. c. d. e. The number is 23 The number is23 The number is number The number is null The number is ANS: C 13. What will the following code display? cout << "Fourn" << "scoren"; cout << "and" << "nseven"; cout << "nyears" << " ago" << endl; a. Four score and seven years ago b. Four score and seven years ago c. Four score and seven years ago d. Four score and seven years ago ANS: A 14. What will the following code display? cout << "Roses " << "are red"; cout << "and " << "violets/n" cout << "are" << "blue" << endl; a. Roses are red and violets are blue b. Roses are red and violets/nare blue c. Roses are redand violets/nareblue d. Roses are red and violets/n are blue ANS: C 15. Which control sequence is used to skip over to the next horizontal tab stop? a. b. c. d. e. n end1 t b ' ANS: C 16. A(n) __________ represents a storage location in the computer's memory. a. b. c. d. e. literal variable comment integer None of these ANS: B 17. Data items whose values do not change while the program is running are a. b. c. d. e. literals variables characters integers None of these ANS: A 18. A variable definition tells the computer a. b. c. d. the variable's name and its value the variable's data type and its value the variable's name and the type of data it will hold whether the variable is an integer or a floating-point number e. None of these ANS: C 19. You must have a _____________ for every variable you intend to use in a program. a. b. c. d. e. purpose variable definition memory space literal value None of these ANS: B 20. Which of the following is not a valid C++ identifier? a. b. c. d. e. April2018 employee_number _1user 1user theLittleBrownFoxWhoRanAway ANS: D 21. What will the following code display? int x = 23, y = 34, z = 45; cout << x << y << z << endl; a. 23 34 45 b. 23 34 45 c. xyz d. 233445 ANS: D 22. The numeric data types in C++ can be broken into two general categories which are a. b. c. d. e. numbers and characters singles and doubles integers and floating-point numbers real and unreal numbers numbers and literals ANS: C 23. Besides the decimal number system that is most common (base 10), two other number systems that can be used in C++ programs are a. b. c. d. e. octal and fractal octal and hexadecimal base 2 and base 4 base 2 and binary None of these ANS: B 24. A character literal is __________, whereas a string literal is __________ a. b. c. d. e. enclosed in quotation marks, enclosed in brackets enclosed in brackets, enclosed in quotation marks enclosed in double quotation marks, enclosed in single quotation marks enclosed in single quotation marks, enclosed in double quotation marks None of these ANS: D 25. Which data type typically requires only one byte of storage? a. b. c. d. e. short int float char string ANS: D 26. In C++11, if you want an integer literal to be treated as a long long int, you can append __________ at the end of the number. a. b. c. d. e. L LONG LONG LL ANS: D 27. The data type used to declare variables that can hold real numbers is a. b. c. d. e. short int float char double ANS: C 28. The float data type is considered ___________ precision and the double data type is considered __________ precision. a. b. c. d. e. single, double double, single floating-point, double floating-point, integer None of these ANS: A 29. Which of the following statements correctly assigns the character M to the variable named letter? a. b. c. d. letter = M letter = “M”; letter = ‘M’; letter = (M); e. letter = M; ANS: C 30. Which of the following lines must be included in a program that has string variables? a. b. c. d. e. #include (string class) #include namespace std; #include string var; None of these ANS: C 31. Assuming that a program has the following string object definition, which statement correctly assigns the string literal “Jane” to the string object? string name; a. b. c. d. e. name = Jane; name = ‘Jane’; name = “Jane”; name = ; string name = {Jane}; ANS: C 32. In memory, C++ automatically places a(n) __________ at the end of string literals which __________. a. b. c. d. e. semicolon, indicates the end of the statement n, indicates an escape sequence null terminator, marks the end of the string bracket, marks the end of the string None of these ANS: C 33. Which of the following defines a double-precision floating-point variable named payCheck? a. b. c. d. float payCheck; double payCheck; payCheck double; Double payCheck; ANS: B 34. The data type of a variable whose value can be either true or false is a. b. c. d. e. int binary bool Boolean T/F ANS: C 35. What will be the output after the following lines of code execute? bool choice; choice = true; cout << "Your choice is " << choice << endl; a. b. c. d. e. true Your choice is true Your choice is 1 Your choice is choice None of these ANS: C 36. Using C++11: What data type does the compiler determine for the variable cost in the following statement? auto cost = 14.95; a. b. c. d. e. int double bool char string ANS: B 37. A variable's __________ is the part of the program that has access to the variable. a. b. c. d. e. data type value scope assignment None of these ANS: C 38. What is the value stored in the variable myNum after the following assignment statement executes? myNum = 23 % 5 a. b. c. d. e. 3 4 4.6 115 None of these ANS: A 39. What is the value of cookies after the following statements execute? int number = 38, children = 4, cookies; cookies = number % children; a. b. c. d. e. 2 4 9 9.5 .5 ANS: A 40. What is the value of number after the following statements execute? int number; number = 18 / 4; a. b. c. d. e. 4.5 4 2 0 unknown ANS: B 41. What is the value of number after the following statements execute? int number; number = 18 % 4 + 2; a. b. c. d. e. 3 4 6.5 0 unknown ANS: B 42. What is output of the following statement? cout << 4 * (15 / (1 + 3)) << endl; a. b. c. d. e. 15 12 63 72 None of these ANS: B 43. Which part of the following line is ignored by the compiler? double userName = "janedoe"; a. b. c. d. e. // user's name is janedoe "janedoe" user's name is user's name is janedoe // None of these ANS: C 44. A multi-line comment a. b. c. d. begins with /* and ends with */ can be used to mark as many lines as desired as comments allows everything in the selected lines to be ignored All of these are true ANS: D 45. Which of the following statements correctly defines a named constant named TAX_RATE that holds the value 0.075? a. double TAX_RATE = 0.075; b. const TAX_RATE; double TAX_RATE = 0.075; c. const double TAX_RATE = 0.075; d. double TAX_RATE; const TAX_RATE = 0.075; e. const TAX_RATE = 0.075; ANS: C 46. Given the following program, which line(s) cause(s) output to be displayed on the screen? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 a. b. c. d. e. // This program displays my gross wages. // I worked 40 hours and I make $20.00 per hour. #include using namespace std; int main() { int hours; double payRate, grossPay; hours = 40; payRate = 20.0; grossPay = hours * payRate; cout << "My gross pay is $" << grossPay << endl; return 0; } lines 13 and 14 lines 8 and 9 line 14 lines 14 and 15 line 15 ANS: C MULTIPLE RESPONSE 1. Select all that apply. Which of the following statements is(are) true about named constants? a. b. c. d. e. A named constant must be all uppercase. The content of a named constant is read-only. The value of a named constant cannot be changed while the program is running. A named constant is defined using the const qualifier. None of these ANS: B, C, D 2. Select all that apply. Using C++11: Which of the following can be used to initialize an integer variable named dozen with the value of 12? a. int dozen = 12; b. int dozen(12); c. int dozen = {12}; d. int dozen = (12); e. int dozen {12}; ANS: A, B, E