C++ OOP Review

Class Characteristics

100

The two types of data members that a class can have...

What is public and private?

200

The _____ section contains member functions. The ____ section contains data members.

What is public? What is private?

300

Special member function that initializes the data members of an object.

What is a constructor?

400

An instance of a class that encapsulates data and functionality pertaining to that data.

What is an object?

500

Hiding the internal details of a class and only exposing a public interface.

What is encapsulation?

Examples

100

Which section is this code:

 double area();

   int perimeter();

    bool right();

    Triangle();

    Triangle(int a);

What is the public section?

200

Is string an example of a class?

Yes

300

Do you a need a semicolon at the end of a class definition?

Yes

400

In what circumstances can you not write private while defining data members?

When you define it before the public.

500

What does the function do?:

void withdraw(double amount) {

        if (amount > 0 && amount <= balance) {

            balance -= amount;

            cout << "Withdrew $" << amount << ". New balance: $" << balance << endl;

        } else {

            cout << "Invalid withdrawal amount or insufficient funds." << endl;

        }

Withdraws money if the amount in the account is positive and has sufficient funds.

True/False

100

T/F: A mutator function should always return a value

True

200

T/F: Accessor functions go last when defining data members.

False.

300

T/F: You have to add const after the parameters after defining an accessor member function.

True.

400

T/F: All member functions in a class must be declared as public.

False.

500

T/F: Member functions are defined separately from the class.

True.

MISC.

100

True or false - a public member function of  a class can only modify the private data members if it is marked const

False

200

True or false - accessor functions are used to modify private data members of a class

False

300

True or false - a const member function cannot change the state of the object it belongs to

True

400

How many accessor functions will be in a code for a rectangle class with data members, length and width?

What is 2?

500

When implementing a member function outside of the class, what operator do we use

::

Writing Code

100

Declare the accessor function for an int data member, grade.

Int get_grade() const

200

Write a line of code you would find in the public section and the private section.

Any correct response.

300

Create an object for this class: 

class Rectangle {

    private: 

        double length;

        double width;

    public: 

        Rectangle();

        Rectangle(double l, double w);

        

        void setLength(double l);

        double getLength() const;

        void setWidth(double w);

        double getWidth() const;

        

        double getArea(double l, double w);

        double getPerimeter(double l, double w);

        bool isSquare(double l, double w);

};

Ms B will check for correctness

400

Create a member function called add_items that adds multiple instances of the same item (say you bought 8 bags of chips) in a class called CashRegister.

void CashRegister:: add_items(int quantity, double price){

    for (int i=1; i<=quantity; i++){

        add_item(price)}

}

500

Put the code in the right order:

1: 

#include "util.h"

#include <cmath>

2:

 public:

    // member functions

    double area();

    int perimeter();

    bool right();

    Triangle();

    Triangle(int a);

3:

private:

    int sideA;

    int sideB;

    int sideC;

4: 

class Triangle{

1, 4, 3, 2