Study Guide III Questions

An array is an example of a structured data type.

\
True

False

True

All components of an array are of the same type.

\
True

False

True

If array index goes out of bounds, the program always terminates in an error.

\
True

False

False

Arrays can be passed as parameters to a function by value, but it is faster to pass them by reference.

\
True

False

False

The word const is used before the array declaration in a function heading to prevent the function from modifying the array.

\
True

False

True

The base address of an array is the memory location of the first array component.

\
True

False

True

A function cannot return a value of the type array.

\
True

False

True

Two arrays are parallel if they hold the same type of data.

\
True

False

False

When a two-dimensional array is declared as a parameter, the C++ compiler ignores the sizes of both dimensions.

\
True

False

False

Which of the following statements declares alpha to be an array of 25 components of the type int?

\
int alpha\[25\];

int array alpha\[25\];

int alpha\[2\]\[5\];

int array alpha\[25\]\[25\];

int alpha\[25\];

Assume you have the following declaration char nameList\[100\];. Which of the following ranges is valid for the index of the array nameList?

\
0 through 99

0 through 100

1 through 100

1 through 101

0 through 99

Suppose that list is an array of 10 components of type int. Which of the following codes correctly outputs all the elements of list? \n  

\
\n for (int j = 1; j < 10; j++) \n      cout << list\[j\] << " "; \n cout << endl;

\n for (int j = 0; j

for (int j = 0; j

What is the output of the following C++ code? \n   \n int list\[5\] = {0, 5, 10, 15, 20}; \n int j; \n   \n for (j = 0; j < 5; j++) \n      cout << list\[j\] << " "; \n cout << endl; \n  

\
0 1 2 3 4

0 5 10 15

0 5 10 15 20

5 10 15 20

0 5 10 15 20

What is the output of the following C++ code? \n   \n int alpha\[5\] = {2, 4, 6, 8, 10}; \n int j; \n   \n for (j = 4; j >= 0; j--) \n     cout << alpha\[j\] << " "; \n cout << endl; \n  

\
2 4 6 8 10

4 3 2 1 0

8 6 4 2 0

10 8 6 4 2

10 8 6 4 2

Suppose that gamma is an array of 50 components of type int and j is an int variable. Which of the following for loops sets the index of gamma out of bounds?

\
\n  for (j = 0; j

for (j = 0; j

Consider the following declaration int alpha\[5\] = {3, 5, 7, 9, 11};. Which of the following is equivalent to this statement?

\
int alpha\[\] =  {3, 5, 7, 9, 11};

int alpha\[\] =  {3 5 7 9 11};

int alpha\[5\] = \[3, 5, 7, 9, 11\];

int alpha\[\] =  (3, 5, 7, 9, 11);

int alpha\[\] =  {3, 5, 7, 9, 11};

Consider the following declaration int alpha\[3\];. Which of the following input statements correctly inputs values into alpha?

\
\n cin >> alpha \n     >> alpha \n     >> alpha;

\n cin >> alpha\[0\] \n     >> alpha\[1\] \n     >> alpha\[2\];

\n cin >> alpha\[1\] \n     >> alpha\[2\] \n     >> alpha\[3\];

\n cin >> alpha;

cin >> alpha\[0\] \n     >> alpha\[1\] \n     >> alpha\[2\];

Consider the following statement: double alpha\[10\]\[5\];. The number of components of alpha is ____.

\
15

50

100

150

50

Consider the statement int list\[10\]\[8\];. Which of the following about list is true?

\
list has 10 rows and 8 columns.

list has 8 rows and 10 columns.

list has a total of 18 components.

list has a total of 108 components.

list has 10 rows and 8 columns.

After the following statements execute, what are the contents of matrix? \n   \n int matrix\[3\]\[2\]; \n int j, k; \n   \n for (j = 0; j < 3; j++) \n     for (k = 0; k < 2; k++) \n         matrix\[j\]\[k\] = j + k; \n  

\
\n   \n 0 0 \n 1 1 \n 2 2

\n   \n 0 1 \n 2 3 \n 4 5

\n   \n 0 1 \n 1 2 \n 2 3

\n   \n 1 1 \n 2 2 \n 3 3

0 1 \n 1 2 \n 2 3

Given the following declaration: \n   \n int j; \n int sum; \n double sale\[10\]\[7\]; \n   \n which of the following correctly finds the sum of the elements of the fifth row of sale?

\
\n sum = 0; \n for(j = 0; j < 7; j++) \n     sum = sum + sale\[5\]\[j\];

\n sum = 0; \n for(j = 0; j < 7; j++) \n     sum = sum + sale\[4\]\[j\];

\n sum = 0; \n for(j = 0; j < 10; j++) \n     sum = sum + sale\[5\]\[j\];

\n sum = 0; \n for(j = 0; j < 10; j++) \n     sum = sum + sale\[4\]\[j\];

sum = 0; \n for(j = 0; j < 7; j++) \n     sum = sum + sale\[4\]\[j\];

Given the following declaration: \n   \n int j; \n int sum; \n double sale\[10\]\[7\]; \n   \n which of the following correctly finds the sum of the elements of the fourth column of sale?

\
\n sum = 0; \n for(j = 0; j < 7; j++) \n     sum = sum + sale\[j\]\[3\];

\n sum = 0; \n for(j = 0; j < 7; j++) \n     sum = sum + sale\[j\]\[4\];

\n sum = 0; \n for(j = 0; j < 10; j++) \n     sum = sum + sale\[j\]\[4\];

\n sum = 0; \n for(j = 0; j < 10; j++) \n     sum = sum + sale\[j\]\[3\];

sum = 0; \n for(j = 0; j < 10; j++) \n     sum = sum + sale\[j\]\[3\];

A struct is a homogeneous data structure with all components of the same type.

\
True

False

False

Both arrays and structs are examples of structured data types.

\
True

False

True

Memory is allocated when you define a struct.

\
True

False

False

A struct can be passed as a parameter to a function by value or by reference.

\
True

False

True

The contents of a struct variable must be written one member at a time.

\
True

False

True

A function can return a value of the type struct.

\
True

False

True

The component type of an array cannot be a struct.

\
True

False

False

A member of a struct can be another struct.

\
True

False

True

A struct is typically a ____ data structure.

\
simple

dynamic

heterogeneous

linked

heterogeneous

The components of a struct are called the ____ of the struct.

\
variables

identifiers

elements

members

members

Which of the following struct definitions is correct in C++?

\
\n struct studentType \n { \n     int ID; \n };

\n struct studentType \n { \n     string name; \n     int ID; \n     double gpa; \n }

\n int struct studentType \n { \n     ID; \n }

\n struct studentType \n { \n     int ID = 1; \n };

struct studentType \n { \n     int ID; \n };

Consider the following struct definition \n   \n struct rectangleData \n { \n     double length; \n     double width; \n     double area; \n     double perimeter; \n }; \n   \n Which of the following variable declarations is correct?

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rectangle rectangleData;

struct rectangleData();

rectangleData myRectangle;

rectangleData rectangle = new rectangleData();

rectangleData myRectangle;

Typically, in a program, a struct is defined ____ in the program.

\
in the main function

before the definitions of all the functions

after the definitions of all the functions

in any function

before the definitions of all the functions

The syntax for accessing a struct member is structVariableName____.

\
.memberName

\*memberName

\[memberName\]

$memberName

.memberName

Consider the following statements. \n   \n struct rectangleData \n { \n     double length; \n     double width; \n     double area; \n     double perimeter; \n }; \n   \n rectangleData bigRect; \n   \n Which of the following statements correctly initializes the component length of bigRect?

\
bigRect = {10};

bigRect.length = 10;

length\[0\]= 10;

bigRect\[0\]= 10

bigRect.length = 10;

In C++, the ____ symbol is an operator, called the member access operator.

\
\:(colon)

.(dot)

,(comma)

$ (dollar sign)

.(dot)

Consider the following statements. \n   \n struct rectangleData \n { \n     double length; \n     double width; \n     double area; \n     double perimeter; \n }; \n   \n rectangleData bigRect; \n   \n Which of the following statements is valid in C++?

\
cin >> bigRect;

cin >> bigRect.length;

perimeter = 2 \* (length + width);

area = length \* width;

cin >> bigRect.length;

A struct variable can be passed as a parameter ____.

\
only by const

only by reference

only by value

either by value or by reference

either by value or by reference

A class is an example of a structured data type.

\
True

False

True

A public member function of a class can access only other public members of the class.

\
True

False

False

By default, all members of a class are public.

\
True

False

False

If the heading of a member function of a class ends with the word const, then the function member cannot modify the private member variables, but it can modify the public member variables.

\
True

False

False

Given the declaration \n   \n class myClass \n { \n public: \n     void print();  //Output the value of x; \n     MyClass(); \n   \n private: \n     int x; \n }; \n   \n myClass myObject; \n   \n The following statement is legal. \n   \n myObject.x = 10;

\
True

False

False

An accessor function of a class first accesses the values of a member variable of the class and then changes the values of the member variable.

\
True

False

False

A mutator function of a class changes the values of the member variable(s) of the class.

\
True

False

True

The public members of a class must be declared before the private members.

\
True

False

False

A constructor has no type and is therefore a void function.

\
True

False

False

The constructor with no parameters is called the default constructor.

\
True

False

True

A constructor with one or more default parameters is called the default constructor.

\
True

False

False

The destructor automatically executes when the class object goes out of scope.

True

False

True

The components of a class are called the ____ of the class.

\
elements

members

objects

properties

members

If a member of a class is ____, you cannot access it outside the class.

\
public

automatic

private

static

private

In C++, you can pass a variable by reference and still prevent the function from changing its value by using the keyword ____ in the parameter declaration.

\
automatic

private

static

const

const

In C++, the scope resolution operator is ____.

\
\:

\::

$

.

\::

A member function of a class that only accesses the value(s) of the data member(s) is called a(n) ____ function.

\
accessor

mutator

constructor

destructor

accessor

To guarantee that the member variables of a class are initialized, you use ____.

\
accessors

mutators

constructors

destructor

constructors

How many destructors can a class have?

\
no explicit destructors

one

two

any number

one

A destructor has the character ____, followed by the name of the class.

\
.

\::

\#

\~

\~