What header file is needed for exit(); a) stdlib.h b) conio.h c) dos.h

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Explain 'this' pointer and what would happen if a pointer is deleted twice?

0 Answers   Genpact,

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What is a forward referencing and when should it be used?

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what is data encapsulation in C++?

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iam a fresher to Qt(GUI a c++ based framework software). i need to develop the basic applications on designer by drag and dropping mechanism...so pls send me the procedure to design applications?

1 Answers  

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Are there interfaces in c++?

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class Alpha { public: char data[10000]; Alpha(); ~Alpha(); }; class Beta { public: Beta() { n = 0; } void FillData(Alpha a); private: int n; }; How do you make the above sample code more efficient? a) If possible, make the constructor for Beta private to reduce the overhead of public constructors. b) Change the return type in FillData to int to negate the implicit return conversion from "int" to "void". c) Make the destructor for Alpha virtual. d) Make the constructor for Alpha virtual. e) Pass a const reference to Alpha in FillData

2 Answers   Quark,

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Floating point representation and output seems to be compiler dependent?

1 Answers  

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What are the differences between a struct in C and in C++?

8 Answers   Amazon, Wipro,

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Write a program to interchange 2 variables without using the third one.

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Explain the uses oof nested class?

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Can the operator == be overloaded for comparing two arrays consisting of characters by using string comparison?

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