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Derived data is data that is copied or enhanced from operational data sources into an informational database. This is in the information catalog center.

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Q: What is derived data?
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Why an array is called derived data type?

it contains the similar type of object which derive from the predefined data type like int,float,char e.t.c so it is called derived data type.........................


Program for derived class in cpp?

#include<iostream> class base { int m_data; public: base(const int data):m_data(data){} base(const base& cpy):m_data(cpy.m_data){} base& operator=(const int rhs){m_data=rhs;return(*this);} base& operator=(const base& rhs){m_data=rhs.m_data;return(*this);} virtual ~base(){} }; class derived { public: derived(const int data):base(data){} derived(const derived& cpy):base(cpy){} derived& operator=(const int rhs){return(base::operator=(rhs));} derived& operator=(const derived& rhs){return(base::operator=(rhs));} virtual ~derived(){} }; int main() { derived d=42; }


Does the derived class take the memory of base class in inheritance?

Yes, the derived class includes the memory of the base class. The derived class inherits everything in the base class, data and function, and provides additional data and function as needed.


What are derived data types in the C language?

You seem to have lost your text book so I am giving you a link where you can study data types, including derived data types.


Can you access in drive class from base class private data?

Base class should no knowledge about derived classes. The "private" modifier on a data member means private to the class which defined it. Base class cannot directly reference/access the private data member of the derived class, and the derived classes cannot access the private data member defined in the base class. Either way the accessing the private data member should be done via properties or getters