RTTI - What is RTTI?

C++ Interview Questions and Answers

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RTTI - What is RTTI?

Answer1.
RTTI stands for "Run Time Type Identification". In an inheritance hierarchy, we can find out the exact type of the objet of which it is member. It can be done by using:

1) dynamic id operator
2) typecast operator

Answer2.
RTTI is defined as follows: Run Time Type Information, a facility that allows an object to be queried at runtime to determine its type. One of the fundamental principles of object technology is polymorphism, which is the ability of an object to dynamically change at runtime.

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Other Interview Questions

• What is C++?
• What is a modifier?
• What is an accessor?
• Differentiate between a template class and class template.
• When does a name clash occur?
• Define namespace.
• What is the use of ‘using’ declaration.
• What is an Iterator class?
• What is an incomplete type?
• What is a dangling pointer?
• Differentiate between the message and method.
• What is an adaptor class or Wrapper class?
• What is a Null object?
• What is class invariant?
• What do you mean by Stack unwinding?
• Define precondition and post-condition to a member function.
• What are the conditions that have to be met for a condition to be an invariant of the class?
• What are proxy objects?
• Name some pure object oriented languages.
• What is a node class?
• What is an orthogonal base class?
• What is a container class? What are the types of container classes?
• How do you write a function that can reverse a linked-list?
• What is polymorphism?
• How do you find out if a linked-list has an end? (i.e. the list is not a cycle)
• How can you tell what shell you are running on UNIX system?
• What is Boyce Codd Normal form?
• What is pure virtual function?
• Write a Struct Time where integer m, h, s are its members
• How do you traverse a Btree in Backward in-order?
• What is the two main roles of Operating System?
• In the derived class, which data member of the base class are visible?
• How do you find out if a linked-list has an end? (i.e. the list is not a cycle)
• What is the difference between realloc() and free()?
• What is function overloading and operator overloading?
• What is the difference between declaration and definition?
• What are the advantages of inheritance?
• How do you write a function that can reverse a linked-list?
• What do you mean by inline function?
• Write a program that ask for user input from 5 to 9 then calculate the average
• Write a short code using C++ to print out all odd number from 1 to 100 using a for loop
• What is public, protected, private?
• Write a function that swaps the values of two integers, using int* as the argument type.
• Tell how to check whether a linked list is circular.
• What is polymorphism?
• What is virtual constructors/destructors?
• What is the difference between an ARRAY and a LIST?
• Does c++ support multilevel and multiple inheritance?
• What is a template?
• Define a constructor - What it is and how it might be called (2 methods).
• You have two pairs: new() and delete() and another pair : alloc() and free(). Explain differences between eg. new() and malloc()
• What is the difference between class and structure?
• What is RTTI?
• What is encapsulation?
• Explain term POLIMORPHISM and give an example using eg. SHAPE object: If I have a base class SHAPE, how would I define DRAW methods for two objects CIRCLE and SQUARE
• What is an object?
• How can you tell what shell you are running on UNIX system?
• Describe PRIVATE, PROTECTED and PUBLIC – the differences and give examples.
• What is namespace?
• What do you mean by inheritance?
• What is a COPY CONSTRUCTOR and when is it called?
• What is Boyce Codd Normal form?
• What is virtual class and friend class?
• What is the word you will use when defining a function in base class to allow this function to be a polimorphic function?
• What do you mean by binding of data and functions?
• What are 2 ways of exporting a function from a DLL?
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• What is a class?
• What is friend function?
• Which recursive sorting technique always makes recursive calls to sort subarrays that are about half size of the original array?
• What is abstraction?
• What are virtual functions?
• What is the difference between an external iterator and an internal iterator? Describe an advantage of an external iterator.
• What is a scope resolution operator?
• What do you mean by pure virtual functions?
• What is polymorphism? Explain with an example?
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• Anything wrong with this code? T *p = 0; delete p;
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• What does extern mean in a function declaration?
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• What’s the auto keyword good for?
• What is the difference between char a[] = “string”; and char *p = “string”; ?
• How do I declare an array of N pointers to functions returning pointers to functions returning pointers to characters?
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• What is an explicit constructor?
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• Will the following program execute?
• Will it execute or not?
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• What methods can be overridden in Java?
• What are the defining traits of an object-oriented language?
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