COP1334 Final Exam
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
How many elements does the following array have? int bugs[1000];
1000
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
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
Look at the following function prototype. int myFunction(double, double, double); How many parameter variables does this function have?
3
What is the last legal subscript that can be used with the following array? int values[5];
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
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 will the following code display? int numbers[ ] = {99, 87, 66, 55, 101 }; cout << numbers[3] << endl;
55
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
What will the following code display? int numbers[ ] = { 99, 87, 66, 55, 101 }; for (int i = 1; i < 4; i++) cout << numbers[i] << endl;
87 66 55
Which of the following statements about global variables is true?
A global variable can have the same name as a variable that is declared locally within a function.
A two-dimensional array of characters can contain:
A) strings of the same length B) uninitialized elements C) strings of different lengths D) All of these
In a function header, you must furnish:
A)names of parameter variables B) data type of the return value C) the name of function D) data type(s) of the parameters E) All of these
What will the following code do? const int SIZE = 5; double x[SIZE]; for(int i = 2; i <= SIZE; i++) { x[i] = 0.0; }
An error will occur when the code runs.
EXIT_FAILURE and ________ are named constants that may be used to indicate success or failure when the exit( ) function is called.
EXIT_SUCCESS
A function's return data type must be the same as the function's parameter(s).
FALSE
A local variable and a global variable may not have the same name within the same program
FALSE
Although two-dimensional arrays are a novel idea, there is no known way to pass one to a function.
FALSE
An array initialization list must be placed on one single line.
FALSE
Assume array1 and array2 are the names of arrays. To assign the contents of array2 to array1, you would use the following statement. array1 = array2
FALSE
C++ limits the number of array dimensions to two.
FALSE
If you attempt to store data past an array's boundaries, it is guaranteed that the compiler will issue an error.
FALSE
Local variables are initialized to zero by default.
FALSE
The statement double money[25.00]; is a valid C++ array definition.
FALSE
When a function is called, flow of control moves to the function's prototype.
FALSE
You must furnish an argument with a function call.
FALSE
What does the following statement do? vector<int> v(10, 2);
It creates a vector object with a starting size of 10 and all elements are initialized with the value 2.
What does the following statement do? vector<int> v(10);
It creates a vector object with a starting size of 10.
A parameter is a special-purpose variable that is declared inside the parentheses of a function definition.
TRUE
A static variable that is defined within a function is initialized only once, the first time the function is called.
TRUE
An individual array element can be processed like any other type of C++ variable.
TRUE
Each individual element of an array can be accessed by the array name and an element number, called a subscript.
TRUE
Global variables are initialized to zero by default
TRUE
It is not considered good programming practice to declare all of your variables globally.
TRUE
It is possible for a function to have some parameters with default arguments and some without.
TRUE
One reason for using functions is to break programs into manageable units, or modules.
TRUE
The amount of memory used by an array depends upon the array's data type and the number of elements in the array.
TRUE
When you pass an array as an argument to a function, the function can modify the contents of the array.
TRUE
You may use the exit( ) function to terminate a program, regardless of which control mechanism is executing.
TRUE
________ functions may have the same name, as long as their parameter lists are different.
Two or more
To assign the contents of one array to another, you must use:
a loop to assign the elements of one array to the other array
When writing functions that accept multi-dimensional arrays as arguments, ________ must be explicitly stated in the parameter list.
all but the first dimension
A(n) ________ is information that is passed to a function, and a(n) ________ is information that is received by a function.
argument, parameter
Unlike regular variables, these can hold multiple values.
arrays
Subscript numbering in C++
begins with zero
Functions are ideal for use in menu-driven programs. When a user selects a menu item, the program can ________ the appropriate function
call
A function is executed when it is:
called
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);
An array's size declarator must be a(n)________ with a value greater than ________.
constant integer expression, zero
A(n) ________ argument is passed to a parameter when the actual argument is left out of the function call.
default
These types of arguments are passed to parameters automatically if no argument is provided in the function call.
default
A function ________ contains the statements that make up the function
definition
It is a good programming practice to ________ your functions by writing comments that describe what they do.
document
Look at the following function prototype. int myFunction(double); What is the data type of the funtion's parameter variable?
double
The individual values contained in array are known as:
elements
This vector function returns true if the vector has no elements.
empty
This function causes a program to terminate, regardless of which function or control mechanism is executing.
exit( )
An array can easily be stepped through by using a:
for loop
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
If a function does not have a prototype, default arguments may be specified in the function ________.
header
An array with no elements is:
illegal in C++
) The statement int grades[ ] = { 100, 90, 99, 80}; shows an example of:
implicit array sizing
A(n) ________ can be used to specify the starting values of an array.
initialization list
Arrays may be ________ at the time they are ________.
initialized, declared
) Look at the following function prototype. int myFunction(double); What is the data type of the funtion's return value?
int
Which of the following is a valid C++ array definition?
int array[10];
Which of the following is a valid C++ array definition?
int scores [10];
It is ________ to pass an argument to a function that contains an individual array element, such as numbers[3].
legal in C++
This type of variable is defined inside a function and is not accessible outside the function.
local
The name of an array stores the ________ of the first array element.
memory address
To pass an array as an argument to a function, pass the ________ of the array.
name
The ________ is automatically appended to a character array when it is initialized with a string constant.
null terminator
A two-dimensional array can have elements of ________ data type(s).
one
A function can have zero to many parameters, and it can return this many values.
only one
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
This vector function removes an item from a vector.
pop_back
A function ________ eliminates the need to place a function definition before all calls to the function
prototype
This vector function is used to insert an item into a vector.
push_back
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
A two-dimensional array can be viewed as ________ and ________.
rows, columns
Given the following declaration, where is 77 stored in the scores array? int scores[ ]={83, 62, 77, 97};
scores [2]
A two-dimensional array is like ________ put together.
several identical arrays
This vector function returns the number of elements in a vector.
size
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
An array of string objects that will hold 5 names would be declared using which statement?
string names[5];
This is a dummy function that is called instead of the actual function it represents.
stub
By using the same ________ you can build relationships between data stored in two or more arrays.
subscript
To access an array element, use the array name and the element's:
subscript
An element of a two-dimensional array is referred to by ________ followed by ________.
the row subscript of the element, the column subscript of the element
An array can store a group of values, but the values must be:
the same data type
Which statement correctly defines a vector object for holding integers?
vector<int> v;
If you leave out the size declarator in an array definition:
you must furnish an initialization list
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
What will the following code display? int numbers[4] = { 99, 87 }; cout << numbers[3] << endl;
0
