C++ Test 2

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 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

Which of the following statements about global variables is true? A) A global variable is accessible only to the mainfunction. 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.

________ algorithms are used to arrange random data into some order. A) Standard search B) Linear C) Sorting D) Binary search E) None of these

Sorting

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

When an array is sorted from highest to lowest, it is said to be in ________ order. A) reverse B) forward C) descending D) ascending E) None of these

descending

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++

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];

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

legal in C++

A(n) ________ search uses a loop to sequentially step through an array. A) binary B) unary C) linear D) relative E) None of these

linear

A binary search begins with the ________ element of an array. A) first B) last C) largest D) middle E) None of these

middle

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 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

This vectorfunction is used to insert an item into a vector. A) insert_item B) add_item C) store D) push_back

push_back

This statement causes a function to end. A) end B) terminate C) return D) release E) None of these

return

An array of stringobjects 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];

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

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

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

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

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

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

How many elements does the following array have? int bugs[1000]; A) 1000 B) 999 C) 1001 D) Cannot tell from the code

1000

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

Which line in the following program contains a call to the showDubfunction? 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

Which line in the following program contains the header for the showDubfunction? 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 2

Using a linear search to find a value that is stored in the last element of an array of 20,000 elements, ________ element(s) must be compared. A) 20,000 B) only the first C) only half D) 2000 E) None of these

20,000

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

Which line in the following program contains the prototype for the showDubfunction? 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 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

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

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

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_FAILUREand ________ 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, 2); A) It creates a vectorobject and initializes all the first two elements with the values 10 and 2. B) It creates a vectorobject with a starting size of 2 and the first element initialized with the value 10. C) It creates a vectorobject with a starting size of 10 and the first element initialized with the value 2. D) It creates a vectorobject with a starting size of 10 and all elements are initialized with the value 2.

It creates a vectorobject 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); A) It creates a vectorobject and initializes all of its elements to the value 10. B) It creates a vectorobject with a starting size of 10. C) It creates a vectorobject and initializes the first element with the value 10. D) It creates a vectorobject that can store only values of 10 or less.

It creates a vectorobject with a starting size of 10.

Regardless of the algorithm being used, a search through an array is always performed ________. A) from lowest to highest element B) from highest to lowest element C) beginning with the middle element D) using a binary search E) None of these

None of these

________ 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

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

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(n) ________ search is more efficient than a ________ search. A) character, string B) integer, double C) binary, linear D) linear, binary E) None of these

binary, linear

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

A function is executed when it is: A) defined B) prototyped C) declared D) called E) None of these

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? 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

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

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

A function ________ contains the statements that make up the function. A) definition B) prototype C) call D) expression E) parameter list

definiton

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

The individual values contained in array are known as ________. A) parts B) elements C) numbers D) constants E) None of these

elements

This vectorfunction returns trueif the vectorhas 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( )

An array can easily be stepped through by using a ________. A) forloop B) reference variable C) named constant D) null value E) None of these

for loop

Data that is sorted in ascending order is ordered ________. A) from lowest to highest value B) from highest to lowest value C) always with a binary sort algorithm D) always with a linear sort algorithm E) None of these

from lowest to highest value

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) forloop B) do-whileloop C) function prototype D) function call E) None of these

function call

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

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 adequate for searching through small arrays. A) binary search B) linear search C) unary search D) bubble sort E) None of these

linear search

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 ________ 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 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

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

This vectorfunction removes an item from a vector. A) remove_item B) delete_item C) erase D)pop_back

pop_back

The range-based forloop, in C++ 11, is designed to work with a built-in variable known as the ________. A) counter variable B) ivariable C) iterator D) range variable E) None of these

range variable

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

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 ________ algorithm is a method of locating a specific item of information in a larger collection of data. A) sort B) search C) standard D) linear E) None of these

search

The ________ sort usually performs fewer exchanges than the ________ sort. A) bubble, selection B) binary, linear C) selection, bubble D) ANSI, ASCII E) None of these

selection, bubble

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

The advantage of a linear search is its ________. A) complexity B) efficiency C) simplicity D) speed E) None of these

simplicity

This vectorfunction returns the number of elements in a vector. A) size B) num_elements C) elements D) length

size

Array elements must be ________ before a binary search can be performed. A) summed B) set to zero C) sorted D) positive numbers E) None of these

sorted

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) mainfunction 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

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

Which statement correctly uses C++ 11 to initialize a vector of ints named nwith 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 };

Which statement correctly defines a vectorobject for holding integers? A) vector v<int>; B) int vector v; C) int<vector> v; D) vector<int> v;

vector<int> v;

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