C++ Interview Questions,Your interviewer might ask

c++interview questions

In this blog post, I have created a list of the most common C++ interview questions. These C++ interview questions not only for fresher but also good for the experienced person. If you want the answer of these c++ questions, then please write in comment box. If you know the answer to the question, then please write the answer in the comment box. Might be your answer helpful for other.

  • What is difference between in C and C++?
  • Why is the size of an empty class not zero in C++?
  • What are C++ access, specifiers ?
  • What are the various OOPs concepts in C++?
  • What are the differences between a C++ struct and C++ class?
  • What is difference between new and malloc?
  • What is a namespace?
  • What is Overriding?
  • How to create .dll in C++ and how to link .dll in your code?
  • What is overloading?
  • How to create and use a reference variable in c++?
  • Can you overload a function based only on whether a parameter is a value or a reference?
  • What is difference between function overloading and Operator Overloading?
  • Can we access private data members of a class without using a member or a friend function?
  • What is the use of inline function?
  • how to access derived class function from base class object without using virtual function?
  • Distinguish between shallow copy and deep copy.
  • Friend class and function in C++
  • what is difference between constructor and destructor?
  • How are .h files loaded and linked with their .c files?
  • What Is Inheritance?
  • What is “this” pointer?
  • What is difference between delete and free?
  • What is encapsulation?
  • What is static Member in c++?
  • What is a pure virtual function in c++?
  • Count the number of words, characters, and lines in a file?
  • Any fundamental difference between source and header files in C?
  • Can a C++ class member function template be virtual?
  • What is the Diamond problem? How can we get around it?
  • What are the advantages of inheritance?
  • why virtual functions cannot be static in c++?
  • How does the compilation/linking process work?
  • Can you explain the order of execution in constructor initialization list?
  • How to make a C++ class whose objects can only be dynamically allocated?
  • Is it possible to have Virtual Constructor? If yes, how? If not, Why not possible?
  • What is a constructor? Is default constructor exist in C++?
  • Can a constructor throw an exception? How to handle the error when the constructor fails?
  • What is the difference between a copy constructor and an overloaded assignment operator?
  • When are copy constructors called in C++?
  • Why copy constructor takes the parameter as a reference in C++?
  • What do you mean by inline function?
  • What is a template function?
  • Can we combine c and C++ code?
  • What is shared pointer in c++?
  • What is typecasting?
  • Why is a pure virtual function initialized by 0?
  • How to create multidimensional arrays using new?
  • When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?
  • Can I free() pointers allocated with new?
  • How do I convert an integer to a string in C++?
  • What is the difference between a pointer and a reference?
  • When should I use references, and when should I use pointers?
  • What is the assignment operator in c++?
  • What does the explicit keyword mean?
  • When do we need to create virtual destructor in our class?
  • What is Polymorphism?
  • What is the effect of extern “C” in C++?
  • What are the different types of polymorphism in C++?
  • Can a copy constructor accept an object of the same class as a parameter, in place of reference
    of the object? If No, why not possible?
  • What about Virtual Destructor?
  • What is conversion constructor?
  • How do you access the static member of a class?
  • When do we use the Initializer List in C++?
  • Is it possible to overload the destructor the class?
  • Which is faster: Stack allocation or Heap allocation
  • What is auto pointer in C++?
  • What is the smart pointer in C++?
  • Can I delete pointers allocated with malloc()?
  • Can I use realloc() on pointers allocated via new?
  • Can I call the destructor explicitly?
  • Can one constructor of a class call another constructor of the same class to initialize the this
    object?
  • What is the difference between an array and a list?
  • What is a “pure virtual” member function and when it is used?
  • What are VTABLE and VPTR?
  • How to handle the exception in C++?
  • What is a Memory Leak?
  • why static functions cannot access non-static variables?
  • What is a dangling pointer?
  • What is “mutable” keyword in C++?
  • What are the debugging methods you use when came across a problem?
  • STL Containers – What are the types of STL containers?

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