Question 1

Consider the following class: 
class Student 
{ 
private: 
int idNum; 
string lastName; 
double gradePointAverage; 
}; 
Add a public function void displayStudentData() to the class definition and then write an implementation for the function.

Accepted Answer

The answer of Consider the following class: 
class Student 
{...

Question 2

Why should you make class data fields private and not public?

Accepted Answer

The answer of Why should you make class data fields...

Question 3

A function that is a user of your class is a class ____________________.

Accepted Answer

The answer of A function that is a user of...

Question 4

The ______________________________ is constructed by using a dash followed by a right-angle bracket (or greater-than sign).

Accepted Answer

The answer of The ______________________________ is constructed by using a...

Question 5

When may it be a good idea to make data public in a class?

Accepted Answer

The answer of When may it be a good idea...

Question 6

____ variables are sometimes called class variables, class fields, or class-wide fields.
A) Public
B) Private
C) Constant
D) Static

Accepted Answer

Static variables are sometimes called class variables, class fields, or class-wide fields. They are associated with the class rather than with an instance of the class, and are shared among all instances of the class.

Question 7

The only type of class member function that does not have a this pointer is a ____ member function.
A) const
B) static
C) public
D) private

Accepted Answer

Static member functions do not have a this pointer as they are not associated with any instance of the class. They can only access static data members and other static member functions. Const, public, and private member functions all have a this pointer.

Question 8

Static functions ____ access non-static variables.
A) can
B) cannot
C) should
D) should not

Accepted Answer

Static functions can only access static variables and methods because they are associated with the class itself rather than with any particular instance of the class. Non-static variables are associated with specific instances of the class, so static functions cannot access them.

Question 9

Write a class with three private fields and then modify it so that the fields are public. Show both versions.

Accepted Answer

The answer of Write a class with three private fields...

Question 10

The variable ____ is an example of a correct use of the this pointer.
A) *this.employeeIdNum
B) (*this).employeeIdNum
C) *(this.employeeIdNum)
D) *(this).employeeIdNum

Accepted Answer

To access a member variable of the current object using the this pointer, we need to use the arrow operator (->) or parentheses to dereference the pointer first. Choice B, (*this).employeeIdNum, correctly dereferences the this pointer and accesses the employeeIdNum member variable.

Question 11

Conventionally, object names begin with a(n) ____________________ letter.

Accepted Answer

The answer of Conventionally, object names begin with a(n) ____________________...

Question 12

When you use an object, the ____ operator, and a non-static function of the object's class, you actually pass the specific object's address to the function as an unseen argument.
A) scope resolution
B) conditional
C) dot
D) address

Accepted Answer

The dot operator is used to access the non-static function of the object's class, and when used in combination with an object, it passes the address of that specific object as an unseen argument to the function. The other operators listed are not involved in this process.

Question 13

When you do not want to declare an object, you can still access a static , class-wide field by using a function that is ____.
A) static
B) const
C) public
D) private

Accepted Answer

Only static functions can access static fields without declaring an object.

Question 14

The ____ pointer is automatically supplied every time you call a non-static member function of a class.
A) this
B) super
C) const
D) void

Accepted Answer

The "this" pointer is automatically supplied every time you call a non-static member function of a class. Its purpose is to hold the memory address of the object that the member function is being called on. This allows the member function to access the object's data members and call other member functions.

Question 15

Conventionally, class names begin with a(n) ____________________ letter.

Accepted Answer

The answer of Conventionally, class names begin with a(n) ____________________...

Question 16

ADT stands for ____________________.

Accepted Answer

The answer of ADT stands for ____________________....

Question 17

____________________ variables belong to the class, and you can use them even if you never instantiate an object.

Accepted Answer

The answer of ____________________ variables belong to the class, and...

Question 18

When you create an object, a block of ____________________ is set aside for the data members.

Accepted Answer

The answer of When you create an object, a block...

Question 19

The ____ operator is the pointer-to-member operator.
A) ::
B) &
C) *
D) ->

Accepted Answer

The pointer-to-member operator is represented by "->" and is used to access members of an object through a pointer to that object. The other options are different operators: "::" is the scope resolution operator, "&" is the reference operator, and "*" is the dereference operator.

Question 20

A ____ class member exists, even when you have not instantiated any objects of the class.
A) public
B) private
C) static
D) const

Accepted Answer

A static class member exists independently of any objects created from the class, and can be accessed using the class name rather than an object instance. Therefore, it exists even if no objects of the class have been created.

Quiz 7: Using Classes

Consider the following class: class Student { private: int idNum; string lastName; double gradePointAverage; }; Add a public function void displayStudentData() to the class definition and then write an implementation for the function.

Why should you make class data fields private and not public?

A function that is a user of your class is a class ____________________.

The ______________________________ is constructed by using a dash followed by a right-angle bracket (or greater-than sign).

When may it be a good idea to make data public in a class?

____ variables are sometimes called class variables, class fields, or class-wide fields.

The only type of class member function that does not have a this pointer is a ____ member function.

Static functions ____ access non-static variables.

Write a class with three private fields and then modify it so that the fields are public. Show both versions.

The variable ____ is an example of a correct use of the this pointer.

Conventionally, object names begin with a(n) ____________________ letter.

When you use an object, the ____ operator, and a non-static function of the object's class, you actually pass the specific object's address to the function as an unseen argument.

When you do not want to declare an object, you can still access a static , class-wide field by using a function that is ____.

The ____ pointer is automatically supplied every time you call a non-static member function of a class.

Conventionally, class names begin with a(n) ____________________ letter.

ADT stands for ____________________.

____________________ variables belong to the class, and you can use them even if you never instantiate an object.

When you create an object, a block of ____________________ is set aside for the data members.

The ____ operator is the pointer-to-member operator.

A ____ class member exists, even when you have not instantiated any objects of the class.