Lecture 21 Quiz Review Introduction to Computer Science

Lecture 21: Quiz Review Introduction to Computer Science Spring 2006 1

1. What value is returned by the return statement above? a 0. b 5. c 6. d 7. 2

2. Given the following function prototype: int test(float, char); which of the following statements is valid? a cout<<test(12, &); . b cout<<test(“ 12. 0”, '&'); . c int u = test(5. 0, '*'); . d cout<<test('12', '&'); . 3

3. To use the predefined function tolower, the program must include the header file _____. a cctype. c cmath. b iostream. d cstdlib. 4

4. A function prototype is _____. a a definition, but not a c a declaration, but not. declaration. a definition b a declaration and a. definition d a comment line. 5

5. Given the following function prototype: double try. Me(double, double); which of the following statements is valid? Assume that all variables are properly declared. a cin>>try. Me(x, y); . b cout<<try. Me(2. 0, 3. 0); . c cout<<try. Me(double, double); . d cout<<try. Me(float, float); . 6

6. Given the following function prototype: int my. Func(int, int); which of the following statements is valid? Assume that all variables are properly declared. a cin>>my. Func(x, y); . b cout<<my. Func(7, 8), 15); . c cin>>my. Func(‘ 2’, ‘ 3’); . d cout<<my. Func(7), 15); . 7

7. Given the above function, choose the output of the following statement: cout<<mystery(9, 7); . a 2. c 7. b 4. d 9. 8

8. Given the above function, choose the output of the following statement: cout<<strange(4, 5); . a -1. c 9. b 1. d 20. 9

9 Assume the above. The output of the statement: cout<<static_cast<int>(tolower('B')); is _____. a 65. c 96. b 67. d 98. 10

10. Given the function prototype: double test. Alpha(int u, char v, double t); which of the following statements is legal? a cout<<test. Alpha(5, 'A', 2); . b cout<<test. Alpha( int 5, char 'A', int 2); . c cout<<test. Alpha(‘ 5. 0’, 'A', 2. 0); . d cout<<test. Alpha(5. 0, 65, 2. 0); . 11

11. Which of the following function prototypes is valid? a int func. Test(int x, int y, float z){}. b func. Test(int x, int y, float){}; . c int func. Test(int, int y, float z). d int func. Test(int, float); . 12

12. Given the function prototype: float test(); , which of the following statements is legal? a cout<<test; . c cout<<test(); . b cout<<test(void); . d cout<<test(“Out”). ; 13

13. The output of the statement: cout<<pow(2, pow(3, 1)); is _____. a 6. c 8. b 7. d 9. 14

14. The standard header file for the abs(x)function is _____. a <cmath>. c <cctype>. b <ioinput>. d <cstdlib>. 15

15. Functions that do not have a data type are called _____ functions. a zero. c void. b null. d empty. 16

16. Which statement about prototypes and headers is true? a Parameter names must be listed in the prototype, . but not necessarily in the header. b Prototypes end with a semicolon, but headers do. not. c Headers should come before prototypes. . d Headers end with a semicolon, but prototypes do. not. 17

17. A variable listed in a function call is known as a(n) _____ parameter. A variable list in a header is known as a(n) _____ parameter. a actual; actual. c actual; formal. b formal; formal. d formal; actual. 18

18. If an & is attached after the data type of a formal parameter, then the formal parameter is a _____. a value parameter. c global variable. b reference parameter. d default variable. 19

19. What are the values of x and y after the statements above execute? (Assume that variables are properly declared. ) a x = 10; y = 10. c x = 15; y = 10. b x = 10; y = 15. d x = 15; y = 15. 20

20. What are the values of one and letter after the statements above execute? a one = 5; letter = 'A'. b one = 10; letter = 'A'. c one = 10; letter = 'B'. d one = 12; letter = 'B'. 21

21. parameters are useful when you want to return more than one value from a function. a Default. c Reference. b Value. d Automatic. 22

22. Suppose that print. Heading is a function without any parameters. Which of the following is a valid function heading? a void. b void. c void. d void. print. Heading() print. Heading(no. Parameters) print. Heading(); print. Heading(void); 23

23. A void function accomplish has three parameters: a parameter u of the type int, a parameter v of the type double, and a parameter letter of the type char. The parameters u and letter need to pass their values out of the function and the parameter v is to only receive the value from the calling environment. Which of the following is a correct function heading? a void accomplish(int& u, double v, char& letter) b. void accomplish(int u, double& v, char letter) c. void accomplish(int& u, double v, char& letter); d. void accomplish(int u, double& v, char letter); 24

24. Suppose that you are given the function definition above. What is the output of the following statements? print. Some. Thing(1); print. Some. Thing(2); print. Some. Thing(3); a ******. b *. * * * c. d. * * * * 25

25. What is the output of the program shown above? a 1 1. 3 1 c 1 2. 2 3 b 1 2. 1 3 d 2 2. 2 3 26

26. Which of the following is a legal C++ function definition? a void func. Test(int& u, double& v) { cout<<u<<" "<<v<<endl; } b void func. Test(int& u, double& v); . { cout<<u<<" "<<v<<endl; } c void func. Test(int& u, double& v). ( cout<<u<<" "<<v<<endl ) d void func. Test(int& u, double& v). [ cout<<u<<" "<<v<<endl; ] 27

27. What is the output of the C++ code above? a 4 5. c 6 5. b 6 4. d 6 6. 28

28. Based on the function definition above, which of the following statements is valid? a one is a value parameter and two is a reference. parameter. b one is a reference parameter and two is a value. parameter. c one and two are reference parameters. . d one and two are value parameters. . 29

29. Which of the following is a legal C++ function definition? a void func. Alpha(int u, double v &) { cout<<u<<" "<<v<<endl; } b void func. Alpha(int #, double #). { cout<<u<<" "<<v<<endl; } c void func. Alpha(int &, double &). { cout<<u<<" "<<v<<endl; } d void func. Alpha(int u, double& v). { cout<<u<<" "<<v<<endl; } 30

30. In C++, the scope resolution operator is _____. a |. b. . c : . d : : . 31

#include <iostream> void Calc. Rectangle(double length, double width, double& circum, double& area); void Print. Result(double length, double width, double circum, double area); using namespace std; int main() { double length, width, circumference, area; cout<< “This program will calculate the circumference and area of the rectangle. ” cout << “Please input the length and width of the rectangle: ” << endl; cin>>length >> width; Calc. Rectangle(length, width, circum, area); Print. Result(length, width, circum, area); return 0; } void Calc. Rectangle(double length, double width, double& circum, double& area); { circum = 2*(length+width); area = length * width; } void Print. Result(double length, double width, double circum, double area); { cout << “Length = ” << length <<endl; cout << “ Width = ”<< width <<endl; cout << “ Circumference = ” << circum <<endl; cout << “ Area = ”<< area <<endl; } 32