C++ Chapter 6-8
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; } A) 2 0 2 B) 2 2 2 C) 0 0 0 D) 2 0 0
2 0 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 } A) 4 B) 6 C) 10 D) 15
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; } A) 2 2 B) 4 2 C) 2 4 D) 4 4
4 2
What will the following code display? int numbers[] = { 99, 87, 66, 55, 101 }; for (int i = 1; i < 4; i++) cout << numbers[i] << endl; A) 99 87 66 55 101 B) 87 66 55 101 C) 87 66 55 D) Nothing. This code has an error.
87 66 55
Which of the following statements about global variables is true? A) A global variable is accessible only to the main function. B) A global variable is declared in the highest-level block in which it is used. C) A global variable can have the same name as a variable that is declared locally within a function. D) If a function contains a local variable with the same name as a global variable, the global variable's name takes precedence within the function. E) All of these are true.
A global variable can have the same name as a variable that is declared locally within a function.
What will the following code do? const int SIZE = 5; double x[SIZE]; for(int i = 2; i <= SIZE; i++) { x[i] = 0.0; } A) Each element in the array is initialized to 0.0 B) Each element in the array, except the first, is initialized to 0.0 C) Each element in the array, except the first and the last, is initialized to 0.0 D) An error will occur when the code runs
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. A) EXIT_TERMINATE B) EXIT_SUCCESS C) EXIT_OK D) RETURN_OK E) None of these
EXIT_SUCCESS
What does the following statement do? vector<int> v(10); A) It creates a vector object and initializes all of its elements to the value 10. B) It creates a vector object with a starting size of 10. C) It creates a vector object and initializes the first element with the value 10. D) It creates a vector object that can store only values of 10 or less.
It creates a vector object with a starting size of 10.
When writing functions that accept multi-dimensional arrays as arguments, ________ must be explicitly stated in the parameter list. A) all dimensions B) all but the first dimension C) the size declarator of the first dimension D) all element values E) None of these
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. A) function call, function header B) parameter, argument C) argument, parameter D) prototype, header E) None of these
argument, parameter
Functions are ideal for use in menu-driven programs. When a user selects a menu item, the program can ________ the appropriate function. A) call B) prototype C) define D) declare E) None of these
call
Here is the header for a function named computeValue: void computeValue(int value) Which of the following is a valid call to the function? A) computeValue(10) B) computeValue(10); C) void computeValue(10); D) void computeValue(int x);
computeValue(10);
An array's size declarator must be a ________ with a value greater than ________. A) number, one B) number, zero C) constant integer expression, zero D) variable, -1 E) None of these
constant integer expression, zero
The individual values contained in array are known as ________. A) parts B) elements C) numbers D) constants E) None of these
elements
This vector function returns true if the vector has no elements. A) has_no_elements B) null_size C) empty D) is_empty
empty
This function causes a program to terminate, regardless of which function or control mechanism is executing. A) terminate() B) return() C) continue() D) exit() E) None of these
exit ( )
A function's return data type must be the same as the function's parameter(s).
false
An array initialization list must be placed on one single line.
false
You must furnish an argument with a function call.
false
An array can easily be stepped through by using a ________. A) for loop B) reference variable C) named constant D) null value E) None of these
for loop
This is a collection of statements that performs a specific task. A) infinite loop B) variable C) constant D) function E) None of these
function
This is a statement that causes a function to execute. A) for loop B) do-while loop C) function prototype D) function call E) None of these
function call
A ________ variable is declared outside all functions. A) local B) global C) floating-point D) counter E) None of these
global
An array with no elements is ________. A) legal in C++ B) illegal in C++ C) automatically furnished one element, with a value of zero D) automatically furnished one value—the null terminator E) None of these
illegal in C++
It is ________ to pass an argument to a function that contains an individual array element, such as numbers[3]. A) illegal in C++ B) legal in C++ C) not recommended by the ANSI committee D) not good programming practice E) None of these
illegal in C++
Arrays may be ________ at the time they are ________. A) resized, executed B) re-scoped, deleted C) initialized, declared D) pre-compiled, typecast E) None of these
initialized, declared
Look at the following function prototype. int myFunction(double); What is the data type of the function's return value? A) int B) double C) void D) Can't tell from the prototype
int
The ________ is automatically appended to a character array when it is initialized with a string constant. A) array name B) number of elements C) value of the first element D) null terminator E) None of these
null terminator
A function can have zero to many parameters, and it can return this many values. A) zero to many B) no C) only one D) a maximum of ten E) None of these
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. A) persist B) execute C) communicate D) change E) None of these
persist
When used as parameters, these types of variables allow a function to access the parameter's original argument. A) reference B) floating-point C) counter D) undeclared E) None of these
reference
) This statement causes a function to end. A) end B) terminate C) return D) release E) None of these
return
An array of string objects that will hold 5 names would be declared using which statement? A) string names[5]; B) string names(5); C) string names5; D) String[5] names; E) None of these will work.
string names[5];
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
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
The amount of memory used by an array depends upon the array's data type and the number of elements in 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. A) Only two B) Two or more C) Zero D) Un-prototyped E) None of these
two or more
Which statement correctly uses C++ 11 to initialize a vector of ints named n with the values 10 and 20? A) vector n<int>(10, 20); B) vector<int> n = {10, 20}; C) vector<int> n { 10, 20 }; D) int vector n ({10}, {20});
vector<int> n { 10, 20 };
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; } A) 5 B) 2 C) 7 D) "getValue(x)"
7
To pass an array as an argument to a function, pass the ________ of the array. A) contents B) size, expressed as an integer C) name D) value of the first element E) None of these
name
A two-dimensional array can have elements of ________ data type(s). A) one B) two C) four D) Any of these E) None of these
one
The range-based for loop, in C++ 11, is designed to work with a built-in variable known as the ________. A) counter variable B) i variable C) iterator D) range variable E) None of these
range variable
An element of a two-dimensional array is referred to by ________ followed by ________. A) the array name, the column number of element B) the row subscript of the element, the column subscript of the element C) a comma, a semicolon D) the row subscript of element, the array name E) None of these
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: A) the same data type B) each of a different data type C) constants D) integers E) None of these
the same data type
A local variable and a global variable may not have the same name within the same program.
false
A function ________ eliminates the need to place a function definition before all calls to the function. A) header B) prototype C) argument D) parameter E) None of these
prototype
When you pass an array as an argument to a function, the function can modify the contents of the array.
true
A(n) ________ can be used to specify the starting values of an array. A) initialization list B) array name C) subscript D) element E) None of these
initialization list
To access an array element, use the array name and the element's ________. A) data type B) subscript C) name D) value E) None of these
subscript
Which statement correctly defines a vector object for holding integers? A) vector v<int>; B) int vector v; C) int<vector> v; D) vector<int> v;
vector<int> v;
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 } A) 4 B) 6 C) 10 D) 15
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; } A) 2 0 2 B) 2 2 2 C) 0 0 0 D) 2 0 0
2 0 0
What will the following code display? int numbers[4] = { 99, 87 }; cout << numbers[3] << endl; A) 87 B) 0 C) garbage D) This code will not compile
0
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? int x = 1; int y = 2; int z = 3; calc(x, y); cout << x << " " << y << " " << z << endl; A) 1 2 3 B) 1 6 3 C) 3 6 3 D) 1 14 9 E) None of these
1 6 3
How many elements does the following array have? int bugs[1000]; A) 1000 B) 999 C) 1001 D) Cannot tell from the code
1000
Look at the following function prototype. int myFunction(double, double, double); How many parameter variables does this function have? A) 1 B) 2 C) 3 D) Can't tell from the prototype
3
What will the following C++ 11 code display? vector<int> numbers { 3, 5 }; for (int val : numbers) cout << val << endl; A) 5 5 5 B) 3 3 3 3 3 C) 3 5 D) Nothing. This code has an error.
3 5
What is the last legal subscript that can be used with the following array? int values[5]; A) 0 B) 5 C) 6 D) 4
4
To assign the contents of one array to another, you must use ________. A) the assignment operator with the array names B) the equality operator with the array names C) a loop to assign the elements of one array to the other array D) Any of these E) None of these
a loop to assign the elements of one array to the other array
A two-dimensional array of characters can contain ________. A) strings of the same length B) strings of different lengths C) uninitialized elements D) All of these E) None of these
all of these
These types of arguments are passed to parameters automatically if no argument is provided in the function call. A) Local B) Default C) Global D) Relational E) None of these
default
The statement: int grades[ ] = { 100, 90, 99, 80}; shows an example of: A) default arguments B) an illegal array declaration C) an illegal array initialization D) implicit array sizing E) None of these
implicit array sizing
A two-dimensional array can be viewed as ________ and ________. A) rows, columns B) arguments, parameters C) increments, decrements D) All of these E) None of these
rows, columns
Given the following declaration, where is the value 77 stored in the scores array? int scores[] = {83, 62, 77, 97}; A) scores[0] B) scores[1] C) scores[2] D) scores[4]
scores[2]
A two-dimensional array is like ________ put together. A) an array and a function B) several identical arrays C) two functions D) two arrays of different types E) None of these
several identical arrays
This vector function returns the number of elements in a vector. A) size B) num_elements C) elements D) length
size
The value in this type of local variable persists between function calls. A) global B) internal C) static D) dynamic E) None of these
static
The value in a ________ variable persists between function calls. A) dynamic B) local C) counter D) static local
static local
This is a dummy function that is called instead of the actual function it represents. A) main function B) stub C) driver D) overloaded function
stub
By using the same ________ you can build relationships between data stored in two or more arrays. A) array name B) data C) subscript D) arguments E) None of these
subscript
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
all of these
Unlike regular variables, these can hold multiple values. A) constants B) named constants C) arrays D) floating-point variables E) None of these
arrays
Subscript numbering in C++________. A) can be set at runtime B) can begin with a programmer-defined value C) varies from program to program D) begins with zero E) None of these
begins with zero
A function is executed when it is: A) defined B) prototyped C) declared D) called E) None of these
called
A ________ argument is passed to a parameter when the actual argument is left out of the function call. A) false B) true C) null D) default E) None of these
default
A function ________ contains the statements that make up the function. A) definition B) prototype C) call D) expression E) parameter list
definition
It is a good programming practice to ________ your functions by writing comments that describe what they do. A) execute B) document C) eliminate D) prototype E) None of these
document
Look at the following function prototype. int myFunction(double); What is the data type of the function's parameter variable? A) int B) double C) void D) Can't tell from the prototype
double
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
If a function does not have a prototype, default arguments may be specified in the function ________. A) call B) header C) execution D) return type E) None of these
header
Which of the following is a valid C++ array definition? A) int array[0]; B) float $payments[10]; C) void numbers[5]; D) int array[10]; E) None of these
int array[10];
Which of the following is a valid C++ array definition? A) int scores[0]; B) float $payments[10]; C) int readings[4.5]; D) int scores [10]; E) None of these
int scores [10];
This type of variable is defined inside a function and is not accessible outside the function. A) global B) reference C) local D) counter E) None of these
local
The name of an array stores the ________ of the first array element. A) memory address B) value C) element number D) data type E) None of these
memory address
This vector function removes an item from a vector. A) remove_item B) delete_item C) erase D) pop_back
pop_back
Global variables are initialized to zero by default.
true
One reason for using functions is to break programs into manageable units, or modules.
true
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 } A) 4 B) 6 C) 10 D) 15
10
What will the following code display? int numbers[] = {99, 87, 66, 55, 101 }; cout << numbers[3] << endl; A) 55 B) 66 C) 101 D) 87
55
What does the following statement do? vector<int> v(10, 2); A) It creates a vector object and initializes all the first two elements with the values 10 and 2. B) It creates a vector object with a starting size of 2 and the first element initialized with the value 10. C) It creates a vector object with a starting size of 10 and the first element initialized with the value 2. D) It creates a vector object with a starting size of 10 and all elements are initialized with the value 2.
It creates a vector object with a starting size of 10 and all elements are initialized with the value 2.
This vector function is used to insert an item into a vector. A) insert_item B) add_item C) store D) push_back
push_back
If you leave out the size declarator in an array definition: A) you must furnish an initialization list B) you are not required to initialize the array elements C) all array elements default to zero values D) your array will contain no elements
you must furnish an initialization list
