C++ Interview Question and Answers

26. What is iterator class?
 
  • Iterator class provides an access to the class which are inside the containers(it holds a group of objects in an organized way).
  • The containers include the data structure, class and abstract data type.
 
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27. What are the types of declarations in C++?
 
    There are so many types of declaration in C++ are :
  • Variable declaration
  • Constant declaration
  • Function declaration
  • Object declaration
 
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28. What are Smart pointers?
  Smart pointers are almost similar to pointers with additional features such as automatic destruction of a variable when it becomes out of scope and the throwing of exceptions that ensures the proper destruction of the dynamically allocated objects.
 
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29. Explain function template?
  Function template provides a means to write generic functions for different data types such as integer, long, float or user defined objects.
 
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30. Explain class template?
  Class template provides a means to write a generic class for different types so that a class can have members based on generic types that do not need to be defined at the moment of creating the class or whose members use these generic types.
 
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