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Lecture 21:Quiz Review

Introduction to Computer Science

Spring 2006

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1. What value is returned by the return statement above?

a.0 c

.6

b.5 d

.7

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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', '&');

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3. To use the predefined function tolower, the program must include the header file _____.

a.cctype c

.cmath

b.iostream d

.cstdlib

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4. A function prototype is _____.

a.

a definition, but not a declaration

c.

a declaration, but not a definition

b.

a declaration and a definition

d.

a comment line

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5. Given the following function prototype: double tryMe(double, double); which of the following statements is valid? Assume that all variables are properly declared.

a.

cin>>tryMe(x,y);

b.

cout<<tryMe(2.0,3.0);

c.

cout<<tryMe(tryMe(double,double),double);

d.

cout<<tryMe(tryMe(float,float),float);

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6. Given the following function prototype: int myFunc(int, int); which of the following statements is valid? Assume that all variables are properly declared.

a.

cin>>myFunc(x,y);

b.

cout<<myFunc(myFunc(7, 8), 15);

c.

cin>>myFunc(‘2’, ‘3’);

d.

cout<<myFunc(myFunc(7), 15);

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7. Given the above function, choose the output of the following statement: cout<<mystery(9, 7);.

a.

2 c.

7

b.

4 d.

9

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8. Given the above function, choose the output of the following statement: cout<<strange(4, 5);.

a.

-1 c.

9

b.

1 d.

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9 Assume the above. The output of the statement: cout<<static_cast<int>(tolower('B')); is _____.

a.

65 c.

96

b.

67 d.

98

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10. Given the function prototype: double testAlpha(int u, char v, double t); which of the following statements is legal?

a.

cout<<testAlpha(5, 'A', 2);

b.

cout<<testAlpha( int 5, char 'A', int 2);

c.

cout<<testAlpha(‘5.0’, 'A', 2.0);

d.

cout<<testAlpha(5.0, 65, 2.0);

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11. Which of the following function prototypes is valid?

a.

int funcTest(int x, int y, float z){}

b.

funcTest(int x, int y, float){};

c.

int funcTest(int, int y, float z)

d.

int funcTest(int, int, float);

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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”);

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13. The output of the statement: cout<<pow(2,pow(3,1)); is _____.

a.

6 c.

8

b.

7 d.

9

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14. The standard header file for the abs(x)function is _____.

a.<cmath> c

.<cctype>

b.<ioinput> d

.<cstdlib>

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15. Functions that do not have a data type are called _____ functions.

a.

zero c.

void

b.

null d.

empty

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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.

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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

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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

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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

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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'

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21. parameters are useful when you want to return more than one value from a function.

a.

Default c.

Reference

b.

Value d.

Automatic

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22.Suppose that printHeading is a function without any parameters. Which of the following is a valid function heading?

a.void printHeading()

b.void printHeading(noParameters)

c.void printHeading();

d.void printHeading(void);

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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);

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24. Suppose that you are given the function definition above. What is the output of the following statements?

printSomeThing(1);printSomeThing(2);printSomeThing(3);

a.******

b.** ** * *

c. * * * * * *

d. * * * * * ** * * *

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25. What is the output of the program shown above?

a.1 13 1

c.1 22 3

b.1 21 3

d.2 22 3

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26. Which of the following is a legal C++ function definition?

a void funcTest(int& u, double& v){

cout<<u<<" "<<v<<endl;}

b.

void funcTest(int& u, double& v);{

cout<<u<<" "<<v<<endl;}

c.

void funcTest(int& u, double& v)(

cout<<u<<" "<<v<<endl)

d.

void funcTest(int& u, double& v)[

cout<<u<<" "<<v<<endl;]

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27. What is the output of the C++ code above?

a.4 5 c

.6 5

b.6 4 d

.6 6

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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.

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29. Which of the following is a legal C++ function definition?

a void funcAlpha(int u, double v &){

cout<<u<<" "<<v<<endl;}

b.void funcAlpha(int #, double #){

cout<<u<<" "<<v<<endl;}

c.void funcAlpha(int &, double &){

cout<<u<<" "<<v<<endl;}

d.void funcAlpha(int u, double& v){

cout<<u<<" "<<v<<endl;}

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30. In C++, the scope resolution operator is _____.

a.

| c.

:

b.

. d.::

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#include <iostream>void CalcRectangle(double length, double width, double& circum, double& area);void PrintResult(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;

CalcRectangle(length, width, circum, area);PrintResult(length, width, circum, area);return 0;

}

void CalcRectangle(double length, double width, double& circum, double& area);{

circum = 2*(length+width);area = length * width;

}

void PrintResult(double length, double width, double circum, double area);{

cout << “Length = ” << length <<endl;cout << “ Width = ”<< width <<endl;cout << “ Circumference = ” << circum <<endl; cout << “ Area = ”<< area <<endl;

}