C++ Interview Questions
Questions Answers Views Company eMail

What is a macro? And how is a macro same as a template?

4 5524

What is the default size allocated for array in the statement if size not specified " int a[] "

CTS,

4 9296

int main() { int i ,a[i]; i = 0; a[i] = 10; cout<< a[i] << endl; return 0; } What will be output of this program?

HCL, Mphasis,

11 17795

What is the difference between Home and $Home?

TCS,

2 5002

what is the abstract class,interface ,its difference with a programatic eg.? hi,recently i went for an interview they ask me what is abstract class ,interface and its difference I said abstract class contain abstact method ,abstract method is a method with no body.Abstract class cannot be instantiated.Abstract class is a base class it required derived class for the implementation of method. Interface is a syntactical contract that all derived class should follow it define properties ,method,events which are known as member of interface. Then They asked me what is the difference between them. I said abstract class interface 1.abstact class can implement method 1.interface cant 2.abstact class can contain constructor, 2.interface cant destructor 3.abstract class cannot support multiple 3.interface support inheritance etc Then they said some different answer I said dont no. Then they ask me when i should make abstract class for an project and when i should make interface. I said if suppose there is two class which must be having method with different logic then we sholud make abstract class. and if suppose we have two class having method .with different logic then we can make interface . Am i correct with my explaination.if not correct me .please provide me that when should we create abstract class and interface and what is difference .please help me

1 4282

difference between abstraction and encapsulation with progarammatic eg. hi,just recently i went for an interview .The interviewer asked what is the difference between abstraction and encapsulation with programmatic eg. I gave the answer as encapsulation mean hiding the relevant data which is not useful for the user, eg a electric fan .hiding the information how the electricity is converted into machanical energy. abtraction showing only the relevant data to the user eg electric fan. it look ,its color ,it design etc only relevant data. Then the interviewer asked me, give me some programmic eg .I Said Let assume a web form having control like textbox,button etc. The user can view textbox,button etc this is the eg of abstraction and when the user click on the button how he is redirected is not known by the user is the eg of the encapsulation. Am I Correct .was the answer given by me is perfect .now i am planing to go for an another interview should i give the same answer.IF not please suggest me a better answer.with some good eg Please help

1 4136

What is the use of fflush(stdin) in c++?

HCL,

4 7497

Why is it so that we can have virtual constructors but we cannot have virtual destructors?

2 4341

CAN U SAY WHICH PROGRAMING LANGUAGE IS USED BY DOCTORS....?

1 3951

WHAT IS THE ABREVATION OF FORTRAN?

4 6186

WHO DEVELOPED C++?

6 11301

Which keyword is written to use a variable declared in one class in the other class?

TCS,

5 9248

int *p = NULL; printf("%1d",p) ; what will be the output of this above code?

Microsoft,

3 11698

What is size of a empty class?

Microsoft, Tata Elxsi, Wipro,

7 12518

can you give real time example for polymarphism

TCS,

5 7524


Un-Answered Questions { C++ }

What is the basic structure of c++ program?

801


Explain this pointer?

793


What is algorithm in c++ programming?

802


Can we sort map in c++?

795


What is setf in c++?

838


Do the parentheses after the type name make a difference with new?

866


Explain the advantages of inheritance.

876


Explain the difference between c & c++?

816


What is the main purpose of c++?

804


What is the full form of dos?

781


What is a memory leak c++?

785


What is microsoft c++ redistributable 2013?

803


Can non graphic characters be used and processed in C++?

922


What is late binding c++?

741


Is c++ built on c?

777