Name: Class: Date: 9. The compiler ignores all comments they are there strictly for the convenience of anyone reading the program.

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1 Name: Class: Date: Exam #1 - Prep True/False Indicate whether the statement is true or false. 1. Programming is the process of writing a computer program in a language that the computer can respond to and that other programmers can understand. 2. Computers are designed to respond to heuristic commands. 3. A data object consists of exactly one piece of data. 4. When all of the statements in a source program are translated before any one statement is executed, the programming language used is called a compiled language. 5. A keyword is a word that is set aside by the C++ language for a special purpose and should only be used in a specified manner. 6. A good function name should never be a mnemonic. 7. A C++ program does not always require a main() function. 8. The iostream file is referred to as a header file because a reference to it is always placed at the top, or head, of a C++ program using the #include command. 9. The compiler ignores all comments they are there strictly for the convenience of anyone reading the program. 10. Properly coded programs do not need comments if the program code is self-explanatory. 11. To prevent the programmer from attempting to perform an inappropriate operation, C++ allows only certain operations to be performed on certain types of data. 12. The term literal reflects the fact that such a value explicitly identifies itself. 13. Limitations of small and extremely expensive memory are a major concern for the vast majority of programs. 14. When the escape character is placed directly in front of a select group of characters, it tells the compiler to escape from the way these characters would normally be interpreted. 15. Both the char and bool data types are signed data types. 16. Floating-point numbers cannot be written in exponential notation. 17. Character data cannot be displayed using cout. 2

2 Name: 18. The endl item is an example of an escape sequence. 19. C++ does not allow mixed-mode expressions. 20. Two binary arithmetic operator symbols may be placed side by side. 21. Expressions containing more than one addition or subtraction are evaluated from left to right as each operator is encountered. 22. An operator s associativity establishes its priority in relation to all other operators. 23. Assignment statements always have an equals (=) sign and one variable name immediately to the left of this sign. 24. Variables that hold single-precision values are declared using the keyword float, whereas variables that hold double-precision values are declared using the keywords double float. 25. Variables that have the same data type can always be grouped together and declared by using a single declaration statement. 26. Declaring multiple variables in a single declaration statement requires giving the data type of variables only once, separating all variable names by commas, and using only one semicolon to terminate the declaration. 27. Current C++ compilers can allocate sufficient storage for a variable without knowing the variable s data type. 28. The compiler only generates an error message for undeclared variables if they are not used in the program. 29. An expression is any combination of constants, variables, and function calls that can be evaluated to yield a result. 30. An example of coercion occurs when an integer value is assigned to a real variable. 31. The statement sum = sum + 10; causes a new value to be stored in sum. 32. The statement variable = variable + newvalue; is an example of an accounting statement. 33. The argument to the sqrt function must be a rational number. 34. The expression sqrt(pow(abs(num1), num2)) is a valid expression. 35. The C type cast syntax does not work in C Data for programs that are going to be executed only once should never be included directly in the program. 37. A well-constructed program should validate user input and ensure that a program does not either crash or produce nonsensical output due to unexpected input. 2

3 Name: 38. C++ does not provide a way for programmers to assign symbolic names to constants, such as the mathematical constant PI. 39. The expression (count + n)++ is a valid expression. 40. Relational expressions cannot be used to compare operands. 41. The logical operators AND, OR and NOT are used to create more complex relational expressions. 42. Tests for equality of single-precision and double-precision values and variables using the relational operator == are usually reliable. 43. The if-else statement directs the computer to select between two statements based on the result of a comparison. 44. The use of braces to enclose a set of individual statements creates a single block of statements, which may be used anywhere in a C++ program in place of a single statement. 45. The statement following if (expression) is executed only if the expression has a nonzero value (a true condition). 46. if-else statements can not contain other if-else statements. 47. An if-else chain is stopped once a true condition is found. 48. An if-else chain can not be continued indefinitely by repeatedly making the last statement another if-else statement. 49. In a switch statement, the keyword case is used to identify individual values that are compared to the value of the switch expression. 50. Using the assignment operator, =, in place of the relational operator, ==, is a commonly made C++ programming error. Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Another term for a computer program is. a. hardware c. object b. software d. procedure 2. Programs written in low-level languages usually execute than programs written in high-level languages. a. more accurately c. faster b. less accurately d. slower 3

4 Name: 3. The purpose of a procedure is to accept as input and transform it in some manner to produce a specific result as an output. a. numbers c. formulas b. objects d. data 4. An algorithm is a step-by-step sequence of that describes how a computation is to be performed. a. data c. objects b. instructions d. classes 5. When English-like phrases are used to describe an algorithm (the processing steps), the description is called. a. a formula c. a program b. a flowchart d. pseudocode 6. The writing of an algorithm using computer-language statements is called the algorithm. a. compiling c. interpreting b. coding d. debugging 7. The concept of creating a particular object from a larger defining set called a is fundamental to all object-oriented programming languages, such as C++. a. super-set c. class b. master set d. relationship 8. To generate a program that can be executed by the computer requires that the C++ program, which is referred to as a source program, be translated into the computer s. a. data c. objects b. machine language d. classes 9. You cannot write a C++ program without relying on some. a. high level code c. machine language b. procedural code d. pseudocode 10. A(n) program is simply a translated version of the source program that can be executed by the computer system with one more processing step. a. compiled c. object b. debugged d. C Most C++ programs contain statements that use for input and output and for finding such quantities as square roots, absolute values, and other commonly encountered mathematical calculations. a. classes c. databases b. objects d. preprogrammed routines 12. In C++, modules can be either or functions. a. classes c. objects b. methods d. procedures 13. The first character of an identifier must be a or an underscore (_). a. number c. letter b. mnemonic d. special character 4

5 Name: 14. We can tell the program which class or function to use by indicating the where we want the compiler to look for the class or function. a. location c. module b. address d. namespace 15. A programming language s is the set of rules for formulating statements that are grammatically correct for the language. a. syntax c. dictionary b. namespace d. format 16. A data is defined as a set of values and a set of operations that can be applied to these values. a. type c. base b. set d. dictionary 17. A(n) value consists of digits only and can optionally be preceded by a plus (+) or minus (-) sign. a. integer c. floating-point b. char d. signed 18. The ANSI C++ standard requires that an int must provide as much storage as a short int. a. at least c. three times b. twice d. four times 19. The value of 1.625e3 is. a c b d The C++ statement cout << (6 + 15); yields the result. a. (6 + 15) c. error b. 21 d. (21) 21. The keyword endl is an example of a C++. a. literal c. object b. character d. manipulator 22. An expression containing only integer values as operands is called a(n) expression. a. standard c. regular b. whole d. integer 23. An expression containing only floating-point values (single-precision and double-precision) as operands is called a expression. a. complex c. real b. mixed d. block 24. An expression containing integer and floating-point values is called a expression. a. whole c. mixed-mode b. standard d. real 25. statements are used to force the compiler to reserve enough physical memory storage for each variable. a. Initialization c. Declamation b. Assignment d. Definition 5

6 Name: 26. All operands used in an expression must before the expression is evaluated. a. have values assigned to them c. be parameterized b. be simplified d. be printed out 27. If b is an integer and d is a double-precision number, the evaluation of the expression b*d is a(n) value. a. integer c. real b. float d. double-precision 28. If n is initialized to the value 5, the expression --n changes the value of n to. a. 1 c. 5 b. 4 d In C++ there are square root functions all named sqrt, with the data type of the argument determining which function is actually called. a. one c. three b. two d. four 30. The compile-time cast is a operator having the syntax datatype (expression). a. unary c. coercive b. binary d. switch 31. The cin object is used to enter data into a program while it is. a. compiling c. interpreting b. running d. loading 32. When a cout statement prints a string that tells the person at the terminal what should be typed, the output string used in this manner is called a(n). a. prompt c. interrupt b. checkpoint d. pause 33. The cin extraction operation data type conversions. a. always makes the correct c. can make some b. can make no d. makes only integer to float 34. The const qualifier specifies that the declared identifier is read-only after it is. a. defined c. edited b. initialized d. validated 35. If it is necessary to change the value of a constant with a symbolic name, the change need only be made. a. at compile time c. twice b. once d. at execution time 36. Using letters is customary in C++ to make const identifiers easy to identify. a. lowercase c. bold b. italic d. uppercase 37. The increment and decrement operators can be applied only to variables. a. expressions involving two or fewer c. individual b. expressions involving three or fewer d. real 6

7 Name: 38. The extraction operator used with cin is. a. << c., b. >> d. <> 39. One of the most common C++ programming errors is forgetting to values for all variables that are used in an expression. a. assign or initialize c. compute b. read in d. parameterize 40. A computer s capability can be used to create an intelligence-like facility. a. adding c. subtracting b. comparison d. thinking 41. A relational expression consists of a relational operator connecting two variable and/or constant operands. a. standard c. single b. default d. simple 42. Like all C++ expressions, relational expressions are evaluated to yield a result. a. single-precision c. Boolean b. double-precision d. numerical 43. letters is essential in alphabetizing names. a. Comparing c. Deleting b. Capitalizing d. Adding 44. can be used to alter the assigned operator priority and improve the readability of relational expressions. a. Colons c. Parentheses b. Semicolons d. Braces 45. Many numbers cannot be represented exactly in binary form using a finite number of bits. a. small c. integer b. large d. decimal 46. For single-precision and double-precision operands, the general expression operand_1 == operand_2 should be replaced by this condition: a. operand_1 operand_2 < EPSILON b. abs(operand_1 operand_2) < EPSILON c. operand_2 operand_1 < EPSILON d. operand_1 operand_2 >= EPSILON 47. Using to enclose a set of statements creates a single block of statements. a. semicolons c. parentheses b. colons d. braces 48. If age is initialized to equal 18, the statement age == 40 has a value of. a. 0 c. 18 b. 1 d case labels may be contained within a switch statement. a. Up to 1 c. Up to 100 b. Up to 10 d. Any number of 7

8 Name: 50. It is to terminate the last case in a switch statement with a break. a. required c. a syntax error b. mandatory d. not necessary 8

9 Exam #1 - Prep Answer Section TRUE/FALSE 1. ANS: T PTS: 1 REF: 4 2. ANS: F PTS: 1 REF: 5 3. ANS: F PTS: 1 REF: 9 4. ANS: T PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: T PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: ANS: F PTS: 1 REF: 138 1

10 41. ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: T PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: F PTS: 1 REF: ANS: T PTS: 1 REF: ANS: T PTS: 1 REF: 173 MULTIPLE CHOICE 1. ANS: B PTS: 1 REF: 3 2. ANS: C PTS: 1 REF: 4 3. ANS: D PTS: 1 REF: 4 4. ANS: B PTS: 1 REF: 5 5. ANS: D PTS: 1 REF: ANS: B PTS: 1 REF: 8 7. ANS: C PTS: 1 REF: 9 8. ANS: B PTS: 1 REF: 9 9. ANS: B PTS: 1 REF: ANS: C PTS: 1 REF: ANS: D PTS: 1 REF: ANS: A PTS: 1 REF: ANS: C PTS: 1 REF: ANS: D PTS: 1 REF: ANS: A PTS: 1 REF: ANS: A PTS: 1 REF: ANS: A PTS: 1 REF: ANS: A PTS: 1 REF: ANS: C PTS: 1 REF: ANS: B PTS: 1 REF: ANS: D PTS: 1 REF: ANS: D PTS: 1 REF: ANS: C PTS: 1 REF: ANS: C PTS: 1 REF: ANS: D PTS: 1 REF: ANS: A PTS: 1 REF: ANS: D PTS: 1 REF: ANS: B PTS: 1 REF: ANS: C PTS: 1 REF: ANS: A PTS: 1 REF: ANS: B PTS: 1 REF: ANS: A PTS: 1 REF: 118 2

11 33. ANS: C PTS: 1 REF: ANS: B PTS: 1 REF: ANS: B PTS: 1 REF: ANS: D PTS: 1 REF: ANS: C PTS: 1 REF: ANS: B PTS: 1 REF: ANS: A PTS: 1 REF: ANS: B PTS: 1 REF: ANS: D PTS: 1 REF: ANS: D PTS: 1 REF: ANS: A PTS: 1 REF: ANS: C PTS: 1 REF: ANS: D PTS: 1 REF: ANS: B PTS: 1 REF: ANS: D PTS: 1 REF: ANS: A PTS: 1 REF: ANS: D PTS: 1 REF: ANS: D PTS: 1 REF: 171 3