100 Best C++ Questions Asked in Actual Interviews

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2007-10-23 23:47:59

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Top 100 C++ Questions Asked in Actual Interviews

what is a friend function? its advantage?
http://www.coolinterview.com/interview/12289

What Is The Use of VirtualDestructer?
http://www.coolinterview.com/interview/11333

1.Difference b/w bool and BOOL 2. Where we use reference and where we use pointers . their differences and advantages and disadvantages .
http://www.coolinterview.com/interview/11797

what are the disadvantages of copy constructor??
http://www.coolinterview.com/interview/11681

Can the structures contain the constructor? If yes, then how?
http://www.coolinterview.com/interview/10986

Is there any way to write a class such that no class can be inherited from it. Please include code
http://www.coolinterview.com/interview/10842

What happens to the member pointers when an exception occures in constructor, while allocating memory ? how can we over come this ?
http://www.coolinterview.com/interview/10843

Why cann't we overload the sizeof, :?, :: ., .* operators in c++
http://www.coolinterview.com/interview/10844

What is importance of const. pointer in copy constructor?
http://www.coolinterview.com/interview/10845

What is difference between copy constructor and constructor?
http://www.coolinterview.com/interview/10846

What is the difference between class and structure?
http://www.coolinterview.com/interview/6144

What is an object?
http://www.coolinterview.com/interview/6145

What is the difference between structures and classes in C++?
http://www.coolinterview.com/interview/6146

What is a class?
http://www.coolinterview.com/interview/6147

What is polymorphism? Explain with an example?
http://www.coolinterview.com/interview/6148

What is public, protected, private?
http://www.coolinterview.com/interview/6149

What is friend function?
http://www.coolinterview.com/interview/6150

What do you mean by binding of data and functions?
http://www.coolinterview.com/interview/6151

Difference between realloc() and free()?
http://www.coolinterview.com/interview/6152

What is function overloading and operator overloading?
http://www.coolinterview.com/interview/6153

What is virtual class and friend class?
http://www.coolinterview.com/interview/6154

What do you mean by inline function?
http://www.coolinterview.com/interview/6155

What is a template?
http://www.coolinterview.com/interview/6156

What is RTTI?
http://www.coolinterview.com/interview/6157

What is namespace?
http://www.coolinterview.com/interview/6158

What do you mean by pure virtual functions?
http://www.coolinterview.com/interview/6159

What is virtual constructors/destructors?
http://www.coolinterview.com/interview/6160

What is the difference between Function and Member function?
http://www.coolinterview.com/interview/6077

What is a memory leak? How can we avoid it?
http://www.coolinterview.com/interview/6078

Define copy constructor? What is the use of copy constructor?
http://www.coolinterview.com/interview/6079

How do you write a program which produces its own source code as its output?
http://www.coolinterview.com/interview/6080

Can you allocate the memory using malloc() in C and deallocate the same memory using free() in c++
http://www.coolinterview.com/interview/6081

it possible to inherit the private member in drived class?
http://www.coolinterview.com/interview/6082

What are the things contains in .obj file ? ( compiled result of .cpp file )
http://www.coolinterview.com/interview/6083

What is difference between followin intialization. int iVar1; int iVar2 = int(); and which one of two should we prefer always and why?
http://www.coolinterview.com/in terview/6084

what is the use of volatile keyword? Give me one example?
http://www.coolinterview.com/interview/6085

What is the difference between Object and Instance?
http://www.coolinterview.com/interview/6086

What is function overriding?
http://www.coolint erview.com/interview/6087

Can we take "main function" as of type float,char etc?
http://www.coolinterview.com/interview/6088

Hey anybody help me to write code for this program wap which display year,month & day presents in a year for eg. 1. no. is 14 print 2 weeks 2. no is 90 print 3 months 3. no is 365 print 1 year user can input any no
http://www.coolinterview.com/interview/6089

How is static variable stored in the memory? ( if there are 2 functions in a file,and the static variable name is same (ex var) in both the function. how is it keep seperately in the memory).
http://www.coolinterview.com/interview/6090

What will be output of the following code #include using namespace std; class abc { public : void main() { cout<<" Its main function "< } }; int main(int c, char **v) { abc a; if(c<1) { cout<<" Error can not accept it "< exit(1); } cout<<" its in main program "< a.main(); return 0; }
http://www.coolinterview.com/interview/6091

what is the difference betwen wait() and delay()?
http://www.coolinterview.com/interview/6092

Why always array starts with index 0
http://www.coolinterview.com/interview/6093

Can main() be overridden
http://www.coolinterview.com/interview/6094

What is t he difference between macro and inline()?
http://www.coolinterview.com/interview/6095

How can we define a dynamic memory allocation in UNIX operating system?
http://www.coolinterview.com/interview/6096

what are auto static variables and auto extern variables?
http://www.coolinterview.com/interview/6097

1.Different types of languages compare in c++ and other lanuages 2.Oops concepts in other language oops
http://www.coolinterview.com/interview/6098

1.Different types of languages compare in c++ and other lanuages 2.Oops concepts in other language oops
http://www.coolinterview.com/interview/6099

How can double dimensional arrays be dynamically initialized in C++?
http://www.coolinterview .com/interview/6100

Can destructor be private?
http://www.coolinterview.com/interview/6101

Why Pointers are not used in C Language. What are the main differences between C and C++
http://www.coolinterview.com/interview/6102

what is memory leaking in c++ ?
http://www.coolinterview.com/interview/6103

class A() { }; int main() { A a; } Whether there will be a default contructor provided by the compiler in above case ?
http://www.coolinterview.com/interview/6104

class A() { }; int main() { A a; } Whether there will be a default contructor provided by the compiler in above case ?
http://www.coolinterview.com/interview/6105

What is operator overloading?what r the advantages of operator overloading?
http://www.coolinterview.com/interview/6106

why array index starts from 0[zero] only?
http://www.coolinterview.com/interview/6107

what is the difference between c&c3;+?
http://www.coolinterview.com/interview/6108

what is the use of virtual destructor?
http://www.coolinterview.com/interview/6109

Why cant one make an object of abstract class?Give compiler view of statement
http://www.coolinterview.com/interview/6110

What is the need /use of function overloading
http://www.coolinterview.com/interview/6111

In c++ have a default constructor ?
http://www.coolinterview.com/interview/6112

What is a "RTTI"?
http://www.coolinterview.com/interview/6113

Have you heard of "mutable" keyword?
http://www.coolinterview.com/interview/6114

What is "strstream”?
http://www.coolinterview.com/interview/6115

What are inline functions?
http://www.coolinterview.com/interview/6116

Can we generate a C++ source code from the binary file?
http://www.coolinterview.com/interview/6117

Explain "passing by value", "passing by pointer" and "passing by reference"
http://www.coolinterview.com/interview/6118

How to write a program such that it will delete itself after execution?
http://www.coolinterview.com/interview/6119

Difference between "vector" and "array"?
http://www.coo linterview.com/interview/6120

What are the types of STL containers?
http://www.coolinterview.com/interview/6121

Difference between a "assignment operator" and a "copy constructor"
http://www.coolinterview.com/interview/6122

Can we have "Virtual Constructors"?
http://www.coolinterview.com/interview/6123

What are the different types of Storage classes?
http://www.coolinterview.com/interview/6124

What are Virtual Functions? How to implement virtual functions in "C"
http://www.coolinterview.com/interview/6125

What are the different types of polymorphism?
http://www.coolinterview.com/interview/6126

Explain the need for "Virtual Destructor".
http://www.coolinterview.com/interview/6127

What is the difference between "overloading" and "overriding"?
http://www.coolinterview.com/interview/6128

Difference between "C structure" and "C++ str ucture".
http://www.coolinterview.com/interview/6129

What will happen if I say delete this
http://www.coolinterview.com/interview/6130

What is the output of printf ("%d")
http://www.coolinterview.com/interview/6131

# What is an algorithm (in terms of the STL/C++ standard library)?
http://www.coolinterview.com/interview/6132

How can you force instantiation of a template?
http://www.coolinterview.com/interview/6133

What is the difference between operator new and the new operator?
http://www.coolinterview.com/interview/6134

Can you explain the term "resource acquisition is initialization?"
http://www.coolinterview.com/interview/6135

what is defference between constructor and destructor
http://www.coolinterview.com/interview/6136

What is encapsulation?
http://www.coolinterview.com/interview/6137

What is the difference between an object and a class?
http://www.coolinterview.com/interview/6138

What do you mean by inheritance?
http://www.coolinterview.com/interview/6139

What is a scope resolution operator?
http://www.coolinterview.com/interview/6140

What is the Basic nature of "cin" and "cout" and what concept or principle we are using on those two?
http://www.coolinterview.com/interview/6141

What are vir tual functions?
http://www.coolinterview.com/interview/6142

We can overload assignment operator as a normal function.But we can not overload assignment operator as friend function why?
http://www.coolinterview.com/interview/6143

What is virtual constructors/destructors?
http://www.coolinterview.com/interview/938

What do you mean by pure virtual functions?
http://www.coolinterview.com/interview/939

What is namespace?
http://www.coolinterview.com/interview/940

What is RTTI?
http://www.coolinterview.com/interview/941

What is a template?
http://www.coolinterview.com/interview/942

What do you mean by inline function?
http://www.coolinterview.com/interview/943

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