Deck 12: Pointers, Classes, Virtual Functions, Abstract Classes, and Lists

Question 1

In C++,the dot operator has a lower precedence than the dereferencing operator.

Answer 1

False

Question 2

What is the output of the following code? int *p;
Int x;
X = 76;
P = &x;
*p = 43;
Cout << x << "," << *p << endl;

A) 76, 76
B) 76, 43
C) 43, 76
D) 43, 43

Answer 2

D

Question 3

What is the output of the following code? int *p;
Int x;
X = 12;
P = &x;
Cout << x << ",";
*p = 81;
Cout << *p << endl;

A) 12, 12
B) 12, 81
C) 81, 12
D) 81, 81

Answer 3

B

Question 4

In the statement
int* p,q;
p and q are pointer variables.

Question 5

The dereferencing operator is also known as the indirection operator and refers to the object to which its operand points.

Question 6

Variables that are created during program execution are called static variables.

Question 7

In C++,you declare a pointer variable by using the ____ symbol.

A) *
B) &
C) #
D) @

Question 8

In C++,pointer variables are declared using the reserved word pointer.

Question 9

Which of the following can be used to initialize a pointer variable?

A) 1
B) NULL
C) "0"
D) '0'

Question 10

If p is a pointer variable,the statement p = p + 1; is valid in C++.

Question 11

A pointer variable is a variable whose content is a memory address.

Question 12

The code int *p; declares p to be a(n)____ variable.

A) new
B) num
C) pointer
D) address

Question 13

The C++ operator ____ is used to destroy dynamic variables.

A) destroy
B) delete
C) *
D) ~

Question 14

What is the output of the following statements? int x = 33;
Int *q;
Q = &x;
Cout << *q << endl;

A) NULL
B) 0
C) 3
D) 33

Question 15

What is the value of x after the following statements execute? int x = 25;
Int *p;
P = &x;
*p = 46;

A) NULL
B) 0
C) 25
D) 46

Question 16

A list is a collection of elements of the same type.

Question 17

In C++,____ is called the address of operator.

A) &
B) *
C) #
D) ->

Question 18

A memory leak is an unused memory space that cannot be allocated.

Question 19

The C++ operator ____ is used to create dynamic variables.

A) dynamic
B) new
C) virtual
D) dereferencing

Question 20

Given the declaration
int *p;
The statement
p = new int[50];
dynamically allocates an array of 50 components of type int and p contains the base address of the array.

Question 21

The ____ operator can be used to return the address of a private data member of a class.

A) dereferencing
B) destructor
C) address of
D) member access

Question 22

Consider the following statement: ptrMemberVarType objectThree(objectOne);
The values of the member variables of objectOne are being copied into the corresponding member variables of objectThree.This initialization is called the ____.

A) member-wise assignment
B) default assignment
C) member-wise initialization
D) default initialization

Question 23

Run-time binding is also known as ____ binding.

A) static
B) shallow
C) dynamic
D) deep

Question 24

A(n)____ is a collection of distinct elements of the same type.

A) class
B) ordered set
C) pointer
D) list

Question 25

A class ____ automatically executes whenever a class object goes out of scope.

A) constructor
B) destructor
C) pointer
D) exception

Question 26

Which of the following operations is allowed on pointer variables?

A) exp
B) %
C) ==
D) /

Question 27

In a(n)____ copy,two or more pointers have their own data.

A) shallow
B) deep
C) static
D) dynamic

Question 28

The statement that declares board to be an array of six pointers wherein each pointer is of type int is: int ____________________;

Question 29

Which of the following arithmetic operations is allowed on pointer variables?

A) increment
B) modulus
C) multiplication
D) division

Question 30

An array created during the execution of a program is called a(n)____ array.

A) list
B) static
C) execution
D) dynamic

Question 31

Given the declaration int *a;,the statement a = new int[50]; dynamically allocates an array of 50 components of the type ____.

A) int
B) int*
C) pointer
D) address

Question 32

Given the statement double *p;,the statement p++; will increment the value of p by ____ byte(s).

A) one
B) two
C) four
D) eight

Question 33

Consider the following statements:
void pointerParameters(int* &p,double *q)
{
.
.
.
}
In the function pointerParameters,the parameter q is a(n)____________________ parameter.

Question 34

In a ____ copy,two or more pointers of the same type point to the same memory.

A) static
B) shallow
C) dynamic
D) deep

Question 35

Which of the following would be appropriate syntax for the heading of a copy constructor for a class called rulerType?

A) rulerType(int inches, int centimeters)
B) rulerType()
C) rulerType(const rulerType& myRuler)
D) copy rulerType(int inches, int centimeters)

Question 36

The ____ constructor is executed when an object is declared and initialized by using the value of another object.

A) default
B) copy
C) struct
D) class

Question 37

Consider the following statements:
void pointerParameters(int* &p,double *q)
{
.
.
.
}
In the function pointerParameters,the parameter p is a(n)____________________ parameter.

Question 38

The statement int *p; is equivalent to int * p;,which is also equivalent to the statement ____________________.

Question 39

Consider the following declaration of a struct:
struct studentType
{
char name[26];
double gpa;
int sID;
char grade;
};
studentType student;
studentType *studentPtr;
The statement (*studentPtr).gpa = 2.5; is equivalent to ____________________ = 2.5;.

Question 40

In ____ binding,the necessary code to call a specific function is generated by the compiler.

A) static
B) dynamic
C) shallow
D) deep

Question 41

The ____________________ of a base class automatically makes the destructor of a derived class virtual.

Question 42

Consider the following statements:
int x;
int &y = x;
The second statement declares y to be a(n)____________________ of x.

Question 43

The copy constructor automatically executes when,as a parameter,an object is passed by ____________________.

Question 44

Once a class contains one or more pure virtual functions,then that class is called a(n)____________________ class.

Question 45

For classes with pointer member variables,you should include the copy constructor and the ____________________ in the class.

Question 46

The statement that declares board to be a pointer to a pointer is: int ____________________;

Question 47

The binding of virtual functions occurs at program ____________________ time.

Question 48

The ____________________ of a list is the number of elements in the list.

Question 49

Consider the following statements:
class shape
{
public:
virtual void draw()= 0;
virtual void move(double x,double y)= 0;
.
.
.
};
The code above is an example of a(n)____________________ class definition.

Question 50

An object of the base class type cannot be passed to a(n)____________________ parameter of the derived class type.