Question 1

In the following class constructor definition, the part of the header starting with a single colon is called the ________________.
BankAccount::BankAccount): balance0), interest0.0)

Accepted Answer

The answer of In the following class constructor definition, the...

Question 2

What is wrong with the following structure definition?
Struct MyStruct
{
Int size;
Float weight;
}

Accepted Answer

Struct definitions in C and C++ must end with a semicolon. The other options are incorrect because structures can have mixed data types, and braces are required to define the scope of the structure.

Question 3

If you have a class with a member function called displayostream& out), that will send the values in the class to the parameter stream, and you need to call that function from within another member function, how would you call it to print the data to the screen? ___________________________

Accepted Answer

The answer of If you have a class with a...

Question 4

A member function of a class should be made private

Accepted Answer

A member function should be made private if it will only be used by other members of the class. This helps to enforce encapsulation and prevent unrelated code from accessing and modifying the class's internal state. Making a member function private does not mean it will never be used, as other members of the class can still call it. It is also not illegal to make a member function private.

Question 5

A class in which modifications to the implementation appear to be invisible to the user of the class is known as _________________.

Accepted Answer

The answer of A class in which modifications to the...

Question 6

A member function that gets called automatically when an object of the class is declared is called a _______________.

Accepted Answer

The answer of A member function that gets called automatically...

Question 7

In a structure definition, the identifiers declared in the braces are called

Accepted Answer

The identifiers declared in the braces of a structure definition are the names of the members of the structure, so the correct answer is C - member names. A structure is a user-defined composite data type in which members are declared with a specific name and data type. The struct keyword is used to define a structure, and inside the braces the member names and their respective data types are declared.

Question 8

Given the following strucure definitions, what is the correct way to print the person's birth year?
Struct DateType
{
Int day;
Int month;
Int year;
}
Struct PersonType
{
Int age;
Float weight;
DateType birthday;
}
PersonType person;

Accepted Answer

The birth year is a part of the birthday structure within the person structure. To access it, we need to use the dot operator (".") to go into the birthday structure and retrieve the year value. Therefore, the correct way to print the person's birth year is option A, cout << person.birthday.year.

Question 9

C++11 allows you to have a constructor call another constructor. This feature is called _________________________.

Accepted Answer

The answer of C++11 allows you to have a constructor...

Question 10

When defining a class, the class should be composed of the kind of values a variable of the class can contain, and

Accepted Answer

When defining a class, it should be composed of member variables that represent the data that an object of that class can contain. In addition, member functions should also be defined to provide behavior for the class. The keyword private is used to specify that the data and functions are only accessible within the class. Other class definitions may be used within the class, but are not required.

Question 11

Given the following strucure definition, what is the correct way to initialize a variable called today?
Struct DateType
{
Int day;
Int month;
Int year;
}

Accepted Answer

The correct way to initialize a struct variable is by using curly braces and assigning values to each member of the struct. Option A and B are incorrect because they do not use the correct syntax for initialization. Option D is incorrect because the struct only has 3 members and 4 values are being assigned.

Question 12

The name of a constructor is _____________

Accepted Answer

The answer of The name of a constructor is _____________...

Question 13

Which of the following is the correct function definition header for the getAge function which is a member of the Person class?

Accepted Answer

To define a member function of a class, we use the scope resolution operator(::) to specify the class to which the member function belongs. Therefore, the correct header for the getAge function, which is a member of the Person class, is "int Person::getAge()".

Question 14

Given the following class definition and the following member function header, which is the correct way to output the private data?
Class Person
{
Public:
Void outputPersonostream& out);
Private:
Int age;
Float weight;
Int id;
};
Void Person::outputPersonostream& out)
{
//what goes here?
}

Accepted Answer

Since the function exists within the Person class, it already has access to the private member variables. Therefore, the correct way to output the data is to directly reference the private variables within the function using the variable names (i.e. age, weight, id). Option A is incorrect because it references the object "person" which is not defined within the function. Option B is incorrect because it would require overloading the << operator for the Person class, which is not given in the problem statement. Option D is not a valid option as it does not provide any code to output the private data.

Question 15

You specify an individual member of a struct by using

Accepted Answer

The dot operator is used to specify an individual member of a struct. It allows you to access or modify the value of a struct member variable. Using the dot operator, you can access a struct member variable by specifying the struct instance name, followed by a dot (.), followed by the member variable name.

Question 16

If class A is derived from class B, then B is a _______ of A.

Accepted Answer

The answer of If class A is derived from class...

Question 17

C++11 allows you to directly set the member variables to initial values in the definition of the class. This feature is called __________________.

Accepted Answer

The answer of C++11 allows you to directly set the...

Question 18

To assign values to a structure variable, you use the

Accepted Answer

To assign values to a structure variable, you use the assignment operator "=", which sets the value of the variable on the left-hand side to the value on the right-hand side.

Question 19

The constructor of a class that does not have any parameters is called a __________ constructor.

Accepted Answer

The answer of The constructor of a class that does...

Question 20

What can a constructor return? _______________

Accepted Answer

The answer of What can a constructor return? _______________...

Quiz 10: Defining Classes

In the following class constructor definition, the part of the header starting with a single colon is called the ________________. BankAccount::BankAccount): balance0), interest0.0)

What is wrong with the following structure definition? Struct MyStruct { Int size; Float weight; }