Explain which of the following declarations will compile and what will be constant ...

C++ Interview Questions and Answers

(Continued from previous question...)

Explain which of the following declarations will compile and what will be constant ...

Explain which of the following declarations will compile and what will be constant - a pointer or the value pointed at: * const char *
* char const *
* char * const


Note: Ask the candidate whether the first declaration is pointing to a string or a single character. Both explanations are correct, but if he says that it’s a single character pointer, ask why a whole string is initialized as char* in C++. If he says this is a string declaration, ask him to declare a pointer to a single character. Competent candidates should not have problems pointing out why const char* can be both a character and a string declaration, incompetent ones will come up with invalid reasons.

(Continued on next question...)

Other Interview Questions

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• What is an Iterator class?
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• What is a dangling pointer?
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• 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?
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• 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?
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• What do you mean by inline function?
• Write a program that ask for user input from 5 to 9 then calculate the average
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• 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).
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• 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?
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• What do you mean by inheritance?
• What is a COPY CONSTRUCTOR and when is it called?
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• What is virtual class and friend class?
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