lecture 21:quiz review
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Lecture 21:Quiz Review. Introduction to Computer Science Spring 2006. 1.What value is returned by the return statement above?. 2. Given the following function prototype: int test(float, char); which of the following statements is valid?. - PowerPoint PPT PresentationTRANSCRIPT
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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;
}