OOP-eration Ace the Test

All About Constructors

100

 What is the main purpose of a constructor in C++?

To initialize an object

200

This constructor has NO arguments/parameters 

Default Constructor

300

DOUBLE JEOPARDY
What does a Constructor return?

400

Where are constructors declared?

Inside the class definition

500

The class NishantLikesBrownies has a constructor...
What is the best possible name for this constructor?

NishantLikesBrownies

(bonus points if italicized)

Public or Private?

100

Is a constructor public or private?

Public

200

What is the process of providing a public interface while hiding the implementation details?

Encapsulation

300

True/False. Data members are public

False

400

What is in the public interface?

All Member Functions

500

Because accessors verify and change the object... 

what type of value should they return?

Trick Question.... Acessors dont change the object!

ReMEMBER Functions?

100

If a member function is void, it is a ___.

Setter

200

In what functions do you use "const"(setters or getters)?

Getters

300

What are the two main types of member functions(formal name)?

Mutators and Accessors

400

Do you start with accessor or mutator functions when defining a class?

Accessor

500

What do you use to mark accessor functions?

CONST

What's Wrong?

100

What is the error in this code:

void Employee:get_name(){return name;}

There has to be TWO colons.

200

What is wrong with this piece of code?

Point::p(double x, double y){
    x_coord = x;
    y_coord = y;
}

It should be Point::Point

300

What's wrong with this code?


Point::Point(double x, double y)
{
    x_coord = x;
    y_coord = y;
}

int main()
{
    double x1;
    Point p1(x1);
}

In int main, the object only contains one parameter, but the constructor needs two to run.

400

What's wrong with this?

class Point

{

    private:

    double x_coord;

    double y_coord;

    void set_x_coord(double x); 

    void set_y_coord(double y);

    public:
    double get_x_coord() const;
    double get_y_coord() const;
};

The setter functions should be in the public part of the class

500

What's wrong with this code?

#include <iostream>
using namespace std;

class Rectangle
{
    private: //members
    double length;
    double width;
   
    public: //functions
    void set_length(double l);
    void set_width(double w);
    double get_length();
    double get_width();
}

A semicolon is missing at the very end... similar to struct

Miscellaneous

100

What does OOP stand for?

Object Oriented Programming

200

What month is Ms. B's birthday in?

March

300

How many sections were in this unit?

6

400

What is the main difference between a structure and class?

• In structures, members are public by default.
• In classes, members are private by default.

500

DOUBLE JEOPARDY

What was the first example used to model a class?

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