C++ Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

STL (140)
OOPS (873)
C++ General (2409)

C++ Interview Questions

Questions Answers Views Company eMail

How do you compile the source code with your compiler?

1050

What are the two types of comments, and how do they differ?

1124

If there are two catch statements, one for base and one for derived, which should come first?

1026

If a function doesn’t return a value, how do you declare the function?

1053

If dog is a friend of boy, and terrier derives from dog, is terrier a friend of boy?

1032

What is the difference between the parameter to a template and the parameter to a function?

1116

How many static variables are created if you put one static member into a template class definition?

1037

When is the copy constructor called?

1134

What does new return if there is insufficient memory to make your new object?

1026

How do you establish a has-a relationship?

1104

Show the declaration for a pointer to function returning long and taking an integer parameter.

1127

Is it legal in c++ to overload operator++ so that it decrements a value in your class?

1047

How do you invoke a base member function from a derived class in which you have not overridden that function?

1119

What is an inclusion guard?

1191

Where must the declaration of a friend function appear?

957

Un-Answered Questions { C++ }

Objective The objective of this problem is to test the understanding of Object-Oriented Programming (OOP) concepts, in particular, on encapsulation. Problem Description Create a program for managing customer’s bank accounts. A bank customer can do the following operations: 1. Create a new bank account with an initial balance. 2. Deposit money into his/her account. 3. Withdraw money from his/her account. For this operation, you need to output “Transaction successful” if the intended amount of money can be withdrawn, otherwise output “Transaction unsuccessful” and no money will be withdrawn from his/her account. Input The input contains several operations and is terminated by “0”. The operations will be “Create name amount”, “Deposit name amount”, or “Withdraw name amount”, where name is the customer’s name and amount is an integer indicating the amount of money. There will be at most 100 bank accounts and they are all created on the first month when the bank is opening. You may assume that all account holders have unique names and the names consist of only a single word. Output The output contains the transaction result of withdrawal operations and the final balance of all customers after some withdrawal and deposit operations (same order as the input). Sample Input Create Billy 2500 Create Charlie 1000 Create John 100 Withdraw Charlie 500 Deposit John 899 Withdraw Charlie 1000 0

2234

It is possible to build a C++ compiler on top of a C compiler. How would you do this?

1119

Define basic type of variable used for a different condition in C++?

1106

What is the use of turbo c++?

1048

You have two pairs: new() and delete() and another pair : alloc() and free(). Explain differences between eg. New() and malloc()

1156

What is the use of bit fields in structure declaration?

979

What is difference between array and vector in c++?

1025

What is switch case in c++ syntax?

1111

What is format for defining a structure?

1077

What is pure virtual function? Or what is abstract class?

1051

What is the use of string in c++?

1020

Can we use this pointer in a class specific, operator-overloading function for new operator?

1096

what is data encapsulation in C++?

1063

Is empty stack c++?

988

Why do we need function?

1049

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