C++ Chapter 12, CSC102 Chapter 12 Quiz, CSC, BTE320 Chapter 10, CSC161 Exam 1, C++ chp10, CSC102 Ch 10 Quiz
In C++, ____ is called the address of operator.
&
True.
(T/F?) A pointer variable is a variable whose content is a memory address.
False.
(T/F?) In C++, the dot operator has a lower precedence than the dereferencing operator.
False, it is ->
(T/F?) In C++, the member access operator arrow is >>.
False, only p is the ptr var.
(T/F?) In the statement int* p, q; p and q are pointer variables.
What is the output of the following code? int *p; int x; x = 12; p = &x; cout << x << ", "; *p = 81; cout << *p << endl;
12, 81
What is the output of the following statements? int x = 33; int *q; q = &x; cout << *q << endl;
33
What is the output of the following code? int *p; int x; x = 76; p = &x; *p = 43; cout << x << ", " << *p << endl;
43, 43
What is the value of x after the following statements execute? int x = 25; int *p; p = &x; *p = 46;
46
Which of the following operations is allowed on pointer variables?
==
destructor
A class ____ automatically executes whenever a class object goes out of scope.
dynamic
An array created during the execution of a program is called a(n) ____ array.
A class and its members can be described graphically using a notation known as the ____ notation. a. OON b. OOD c. UML d. OOP
C. UML
studentPtr->gpa
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;
member-wise initialization
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 ____.
abstract
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.
value
Consider the following statements: void pointerParameters(int* &p, double *q) { . . . } In the function pointerParameters, the parameter q is a(n) ____________________ parameter.
In C++, pointer variables are declared using the reserved word pointer.
False
In C++, the dot operator has a lower precedence than the dereferencing operator.
False
In C++, the member access operator arrow is >>.
False
In the statement int* p, q; p and q are pointer variables.
False
Variables that are created during program execution are called static variables.
False
int
Given the declaration int *a;, the statement a = new int[50]; dynamically allocates an array of 50 components of the type ____.
8
Given the statement double *p;, the statement p++; will increment the value of p by ____ byte(s).
& or ampersand
In C++, ____ is called the address of operator.
virtual
In C++, virtual functions are declared using the reserved word ____.
*
In C++, you declare a pointer variable by using the ____ symbol.
static
In ____ binding, the necessary code to call a specific function is generated by the compiler.
deep
In a ____ copy, two or more pointers have their own data.
shallow
In a ____ copy, two or more pointers of the same type point to the same memory.
If a member of a class is ____, you cannot access it outside the class.
Private
dynamic
Run-time binding is also known as ____ binding.
True
T/F? A memory leak is an unused memory space that cannot be allocated.
True.
T/F? 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.
True.
T/F? If p is a pointer variable, the statement p = p + 1; is valid in C++.
False, they are declared using *
T/F? In C++, pointer variables are declared using the reserved word pointer.
True
T/F? The dereferencing operator is also known as the indirection operator and refers to the object to which its operand points.
False
T/F? Variables that are created during program execution are called static variables.
new
The C++ operator ____ is used to create dynamic variables.
delete
The C++ operator ____ is used to destroy dynamic variables.
copy
The ____ constructor is executed when an object is declared and initialized by using the value of another object.
address of
The ____ operator can be used to return the address of a private data member of a class.
virtual destructor
The ____________________ of a base class automatically makes the destructor of a derived class virtual.
execution or run
The binding of virtual functions occurs at program ____________________ time.
pointer
The code int *p; declares p to be a(n) ____ variable.
value
The copy constructor automatically executes when, as a parameter, an object is passed by ____________________.
int* p;
The statement int *p; is equivalent to int * p;, which is also equivalent to the statement ____________________.
*board[6]
The statement that declares board to be an array of six pointers wherein each pointer is of type int is: int ____________________;
A pointer variable is a variable whose content is a memory address
True
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.
True
If p is a pointer variable, the statement p = p + 1; is valid in C++.
True
The dereferencing operator is also known as the indirection operator and refers to the object to which its operand points.
True
12, 81
What is the output of the following code? int *p; int x; x = 12; p = &x; cout << x << ", "; *p = 81; cout << *p << endl;
43, 43
What is the output of the following code? int *p; int x; x = 76; p = &x; *p = 43; cout << x << ", " << *p << endl;
33
What is the output of the following statements? int x = 33; int *q; q = &x; cout << *q << endl;
46
What is the value of x after the following statements execute? int x = 25; int *p; p = &x; *p = 46;
Increment
Which of the following arithmetic operations is allowed on pointer variables? a. Multiplication b. Division c. Increment d. Modulus
nullptr
Which of the following can be used to initialize a pointer variable? a. '0' b. 1 c. "0" d. nullptr
==
Which of the following operations is allowed on pointer variables? a. % b. / c. == d. exp
rulerType(const rulerType& myRuler)
Which of the following would be appropriate syntax for the heading of a copy constructor for a class called rulerType? a. rulerType() b. copy rulerType(int inches, int centimeters) c. rulerType(const rulerType& myRuler) d. rulerType(int inches, int centimeters)
A ____ sign in front of a member name on a UML diagram indicates that this member is a public member. a. + b. - c. # d. $
a. +
In C++, the ____ is called the member access operator. a. . b. , c. :: d. #
a. .
A class is an example of a structured data type. a. True b. False
a. True
If an object is declared in the definition of a member function of the class, then the object can access both the public and private members of the class. a. True b. False
a. True
In C++ terminology, a class object is the same as a class instance. a. True b. False
a. True
In C++, class is a reserved word and it defines only a data type. a. True b. False
a. True
Which of the following class definitions is correct in C++? a. class studentType { public: void setData(string, double, int); private: string name; }; b. class studentType { public: void setData(string, double, int); void print() const; private: string name; double gpa; } c. class studentType { public void setData(string, double, int); private string name; }; d. studentType class { public: void setData(string, double, int); private: string name; };
a. class studentType { public: void setData(string, double, int); private: string name; };
The ____ operator can be used to return the address of a private data member of a class.
address of
As parameters to a function, class objects can be passed by reference only. a. True b. False
b. False
Given the declaration class myClass { public: void print(); //Output the value of x; MyClass(); private: int x; }; myClass myObject; The following statement is legal. myObject.x = 10; a. True b. False
b. False
If an object is created in a user program, then the object can access both the public and private members of the class. a. True b. False
b. 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. a. True b. False
b. False
The public members of a class must be declared before the private members. a. True b. False
b. False
You can use arithmetic operators to perform arithmetic operations on class objects. a. True b. False
b. False
A class object can be ____. That is, it is created each time the control reaches its declaration, and destroyed when the control exits the surrounding block. a. static b. automatic c. local d. public
b. automatic
Consider the accompanying class definition, and the object declaration: rectangleType bigRect(14,10); Which of the following statements is correct? a. bigRect.setLengthWidth(); b. bigRect.setLengthWidth(3.0, 2.0); c. bigRect.length = 2.0; d. bigRect.length = bigRect.width;
b. bigRect.setLengthWidth(3.0, 2.0);
Which of the following class definitions is correct in C++?
b. class studentType { public: void setData(string, double, int); private: string name; };
Consider the UML class diagram shown in the accompanying figure. Which of the following is the name of the class? a. clock b. clockType c. Type d. +clockType
b. clockType
clockType -hr: int -min: int -sec: int +setTime(int, int, int): void +getTime(int&, int&, int&) const: void +printTime() const: void +incrementSeconds(): int +incrementMinutes(): int +incrementHours(): int +equalTime(const clockType&) const: bool 15. The word ____ at the end of several the member functions in the accompanying figure class clockType specifies that these functions cannot modify the member variables of a clockType object. a. static b. const c. automatic d. private
b. const
The components of a class are called the ____ of the class. a. elements b. members c. objects d. properties
b. members
A ____ sign in front of a member name on a UML diagram indicates that this member is a protected member. a. + b. - c. # d. $
c. #
Consider the accompanying class definition, and the declaration: rectangleType bigRect; Which of the following statements is correct? a. rectangleType.print(); b. rectangleType::print(); c. bigRect.print(); d. bigRect::print();
c. bigRect.print();
If a member of a class is ____, you cannot access it outside the class. a. public b. automatic c. private d. static
c. private
class rectangleType { public: void setLengthWidth(double x, double y); //Postcondition: length = x; width = y; void print() const; //Output length and width; double area(); //Calculate and return the area of the rectangle; double perimeter(); //Calculate and return the parameter; rectangleType(); //Postcondition: length = 0; width = 0; rectangleType(double x, double y); //Postcondition: length = x; width = y; private: double length; double width; }; 20. Consider the accompanying class definition. Which of the following variable declarations is correct? a. rectangle rectangleType; b. class rectangleType rectangle; c. rectangleType rectangle; d. rectangle rectangleType.area;
c. rectangleType rectangle;
clockType -hr: int -min: int -sec: int +setTime(int, int, int): void +getTime(int&, int&, int&) const: void +printTime() const: void +incrementSeconds(): int +incrementMinutes(): int +incrementHours(): int +equalTime(const clockType&) const: bool The word ____ at the end of the member functions in the classclockType specifies that these functions cannot modify the member variables of a clockType object.
const
The ____ constructor is executed when an object is declared and initialized by using the value of another object.
copy
Consider the UML class diagram shown in the accompanying figure. According to the UML class diagram, how many private members are in the class? a. none b. zero c. two d. three
d. three
In a ____ copy, two or more pointers have their own data.
deep
An array created during the execution of a program is called a(n) ____ array.
dynamic
Given the statement double *p;, the statement p++; will increment the value of p by ____ byte(s).
eight
Given the declaration int *a;, the statement a = new int[50]; dynamically allocates an array of 50 components of the type ____.
int
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 ____.
member-wise initialization
The components of a class are called the ____ of the class.
members
Which of the following can be used to initialize a pointer variable?
nullptr
The code int *p; declares p to be a(n) ____ variable.
pointer
class rectangleType { public: void setLengthWidth(double x, double y); //Postcondition: length = x; width = y; void print() const; //Output length and width; double area(); //Calculate and return the area of the rectangle; double perimeter(); //Calculate and return the parameter; rectangleType(); //Postcondition: length = 0; width = 0; rectangleType(double x, double y); //Postcondition: length = x; width = y; private: double length; double width; }; Consider the accompanying class definition. Which of the following class variable declarations is correct?
rectangleType rectangle;
Which of the following would be appropriate syntax for the heading of a copy constructor for a class called rulerType?
rulerType(const rulerType& myRuler)
In a ____ copy, two or more pointers of the same type point to the same memory.
shallow
In C++, virtual functions are declared using the reserved word ____.
virtual
reference
void pointerParameters(int* &p, double *q) { . . . } In the function pointerParameters, the parameter p is a(n) ____________________ parameter.
