Answer / subham chaudhary

 GEMSTONE/OPAL of Gemstone systems.
 ONTOS of Ontos.
 Objectivity of Objectivity inc.
 Versant of Versant object technology.
 Object store of Object Design.
 ARDENT of ARDENT software.
 POET of POET software.

What are the important differences between c++ and java?

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What can I use instead of namespace std?

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Is main a class in c++?

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class professor {}; class teacher : public virtual professor {}; class researcher : public virtual professor {}; class myprofessor : public teacher, public researcher {}; Referring to the sample code above, if an object of class "myprofessor" were created, how many instances of professor will it contain? a) 0 b) 1 c) 2 d) 3 e) 4

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is throwing exception from a constructor not a good practice ?

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What is c++ redistributable?

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What does flush do c++?

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