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

Question 1

What is the output of the following statements?

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

Answer 1

D

Question 2

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

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

Answer 2

A

Question 3

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

Answer 3

True

Question 4

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

Question 5

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 6

What is the output of the following code?

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

Question 7

The seqSearch function returns true if an item in the list equals the searchItem.

Question 8

What is the value of x after the following statements execute?

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

Question 9

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

Question 10

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

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

Question 11

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

Question 12

What is the output of the following code?

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

Question 13

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

A) destroy
B) delete
C) *
D) ˜

Question 14

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

Question 15

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

Question 16

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

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

Question 17

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

Question 18

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

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

Question 19

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

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

Question 20

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

Question 21

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 22

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

Question 23

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

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

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

Which of the following operations is allowed on pointer variables?

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

Question 27

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

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

Question 28

Run-time binding is also known as ____ binding.

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

Question 29

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

Question 30

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

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

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 declaration of a struct:The statement (*studentPtr).gpa = 2.5; is equivalent to ___________________ = 2.5;.

Question 33

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 34

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

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 ____ 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 37

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

Question 38

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

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

Question 39

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

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

Question 40

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 41

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

Question 42

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

Question 43

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

Question 44

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