### Copy Constructor in Object-Oriented Programming**Question:** If class B has a public copy constructor, which statement will cause the copy constructor to be called?#### Multiple-Choice Options:1. **Option 1:** ```cpp x = y; ``` - *Description:* - `x` and `y` are instances of `B`.2. **Option 2:** ```cpp foo(bar); ``` - *Description:* - `bar` is an instance of `B` and `foo` is a function declared as: ```cpp void foo(B obj); ```3. **Option 3:** - *Description:* - None of these.4. **Option 4:** ```cpp foo(bar); ``` - *Description:* - `bar` is an instance of `B` and `foo` is a function declared as: ```cpp void foo(B &obj); ```**Explanation of Options:**- **Option 1** involves assigning one instance of class `B` to another. This might invoke the assignment operator rather than the copy constructor.- **Option 2** involves passing an instance `bar` of class `B` by value to a function `foo`. This will call the copy constructor because the object is copied when it is passed.- **Option 3** is a distractor.- **Option 4** involves passing an instance `bar` of class `B` by reference to a function `foo`. This will not call the copy constructor because it passes a reference to the same instance rather than copying it.Understanding these options helps in identifying how different scenarios invoke a copy constructor in object-oriented programming.

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If class B has a public copy constructor, which statement will cause the copy constructor to be called?

Database System Concepts

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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

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OOPs

In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.

Constructor

The easiest way to think of a constructor in object-oriented programming (OOP) languages is:

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