Chapter 6 Computer Science Quiz-AB

Given the following function definition void calc (int a, int& b) { int c; c = a + 2; a = a * 3; b = c + a; } What is the output of the following code fragment that invokes calc? (All variables are of type int) x = 1; y = 2; z = 3; calc(x, y); cout << x << " " << y << " " << z << endl;

1 6 3

Which line in the following program contains a call to the showDub function? 1 #include <iostream> 2 using namespace std; 3 4 void showDub(int); 5 6 int main() 7 { 8 int x = 2; 9 10 showDub(x); 11 cout << x << endl; 12 return 0; 13 } 14 15 void showDub(int num) 16 { 17 cout << (num * 2) << endl; 18 }

10

Which line in the following program contains the header for the showDub function? 1 #include <iostream> 2 using namespace std; 3 4 void showDub(int); 5 6 int main() 7 { 8 int x = 2; 9 10 showDub(x); 11 cout << x << endl; 12 return 0; 13 } 14 15 void showDub(int num) 16 { 17 cout << (num * 2) << endl; 18 }

15

What is the output of the following program? #include <iostream> using namespace std; void doSomething(int&); int main() { int x = 2; cout << x << endl; doSomething(x); cout << x << endl; return 0; } void doSomething(int& num) { num = 0; cout << num << endl; }

2 2 2

Which line in the following program contains the prototype for the showDub function? 1 #include <iostream> 2 using namespace std; 3 4 void showDub(int); 5 6 int main() 7 { 8 int x = 2; 9 10 showDub(x); 11 cout << x << endl; 12 return 0; 13 } 14 15 void showDub(int num) 16 { 17 cout << (num * 2) << endl; 18 }

4

What is the output of the following program? #include <iostream> using namespace std; void showDub(int); int main() { int x = 2; showDub(x); cout << x << endl; return 0; } void showDub(int num) { cout << (num * 2) << endl; }

4 2

What is the output of the following program? #include <iostream> using namespace std; int getValue(int); int main() { int x = 2; cout << getValue(x) << endl; return 0; } int getValue(int num) { return num + 5; }

7

In a function header, you must furnish: A)data type(s) of the parameters B)data type of the return value C)the name of function D)names of parameter variables E)All of these

E)All of these

A function's return data type must be the same as the function's parameter(s).

False

T/F: When a function is called, flow of control moves to the function's prototype.

False

T/F: You must furnish an argument with a function call.

False

What is the output of the following program? #include <iostream> using namespace std; void doSomething(int); int main() { int x = 2; cout << x << endl; doSomething(x); cout << x << endl; return 0; } void doSomething(int num) { num = 0; cout << num << endl; }

The answer is NOT 2 0 0 It is probably 2 0 2

A parameter is a special-purpose variable that is declared inside the parentheses of a function definition.

True

T/F: It is not considered good programming practice to declare all of your variables globally.

True

T/F: One reason for using functions is to break programs into manageable units, or modules.

True

________ functions may have the same name, as long as their parameter lists are different.

Two or more

Here is the header for a function named computeValue: void computeValue(int value) Which of the following is a valid call to the function?

computeValue(10);

Look at the following function prototype. int myFunction(double); What is the data type of the funtion's parameter variable?

double

This is a collection of statements that performs a specific task.

function

This is a statement that causes a function to execute.

function call

A ________ variable is declared outside all functions.

global

Look at the following function prototype. int myFunction(double); What is the data type of the funtion's return value?

int

This type of variable is defined inside a function and is not accessible outside the function.

local

If a function is called more than once in a program, the values stored in the function's local variables do not ________ between function calls.

persist

A function ________ eliminates the need to place a function definition before all calls to the function.

prototype

When used as parameters, these types of variables allow a function to access the parameter's original argument.

reference

This statement causes a function to end.

return

The value in this type of local variable persists between function calls.

static

The value in a(n) ________ variable persists between function calls.

static local