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

Question 1

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

Answer 1

True

Question 2

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

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

Answer 2

C

Question 3

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

Answer 3

True

Question 4

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

Question 5

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

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

Question 6

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

Question 7

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

Question 8

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

Question 9

What is the output of the following code?

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

Question 10

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

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

Question 11

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

A) destroy
B) delete
C) *
D) ˜

Question 12

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 13

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

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

Question 14

What is the output of the following code?

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

Question 15

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

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

Question 16

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

Question 17

In C++, the member access operator arrow is >>.

Question 18

What is the output of the following statements?

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

Question 19

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

Question 20

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

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

Question 21

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

Question 22

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

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

Question 23

Consider the following statements:
In the function pointerParameters, the parameter q is a(n) ____________________ parameter.

Question 24

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 25

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 26

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

Question 27

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 28

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 29

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 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

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

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

Question 32

Consider the following statements:
In the function pointerParameters, the parameter p is a(n) ____________________ parameter.

Question 33

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

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

Question 34

In C++, virtual functions are declared using the reserved word ____.

A) virtual
B) private
C) public
D) struct

Question 35

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 36

Which of the following operations is allowed on pointer variables?

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

Question 37

Run-time binding is also known as ____ binding.

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

Question 38

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

A) Increment
B) Modulus
C) Multiplication
D) Division

Question 39

Consider the following declaration of a struct:

Question 40

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 41

The binding of virtual functions occurs at program ____________________ time.

Question 42

Consider the following statements:
The code above is an example of a(n) ____________________ class definition.

Question 43

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