class A { public: void f(); protected: A() {} A(const A&){} }; Examine the class declaration shown above. Why are the default and copy constructors declared as protected? 1. To ensure that A cannot be created via new by a more derived class 2. To ensure that A cannot be copied 3. To ensure that A cannot be used as a base class except when public inheritance has been used 4. To ensure that A cannot be created/copied outside the inheritance chain 5. To ensure that A cannot be instantiated as a static variable

1 Answers  

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Is it possible to provide special behavior for one instance of a template but not for other instances?

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What are the defining traits of an object-oriented language?

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Please explain the reference variable in c++?

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What is the extension of c++?

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Will this c++ program execute or not?

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What are c++ tokens?

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Why can you not make a constructor as const?

3 Answers  

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What is overloading unary operator?

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How long does this loop run: for(int x=0; x=3; x++) a) Never b) Three times c) Forever

17 Answers   Datavance, Quark, VEL, Wipro,

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What is the Difference between "vector" and "array"?

15 Answers   Covansys, Gambit, TCS, Wipro,

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Write about an iterator class?

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