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

C++ General Interview Questions

Questions Answers Views Company eMail

what is an array

20 21518

Write a function which takes a character array as input and reverses it in place.

Lehman Brothers, Vision Infotech,

2 9013

Write a String class which has: 1) default constructor 2) copy constructor 3) destructor 4) equality operator similar to strcmp 5) constructor which takes a character array parameter 6) stream << operator

HCL, Lehman Brothers, Zoomerang,

2 9233

In C++ cout is: a) object b) class c) something else

Infosys, Lehman Brothers,

11 30223

What is the output of: String a1 = "Hello"; String a2 = "world!"; String* s1 = &a2; String& s2 = a1; s1 = &a1; s2 = a2; std::cout << *s1 << " " << s2 << std::endl;

Lehman Brothers,

4 9354

Why would you make a destructor virtual?

Lehman Brothers,

3 9267

Is there any difference between dlearations int* x and int *x? If so tell me the difference?

Lason,

16 31547

What C++ libraries are you proficient with?

Google,

1 9209

Which algorithm do you like the most? Why?

Google,

2 8753

Have you used MSVC? What do you think of it?

Google,

2 8851

What is design pattern?

Samsung,

2 8919

What are advantages and disadvantages of Design patterns?

IBM, Vodafone,

7 110899

whats the size of class EXP on 32 bit processor? class EXP { char c1; char c2; int i1; int i2; char *ptr; static int mem; };

Huawei,

5 11150

what is importance of data sturture in a programming language?

L&T, TCS, Wipro,

22 49417

If P is the population on the first day of the year, B is the birth rate, and D is the death rate, the estimated population at the end of the year is given by the formula: The population growth rate is given by the formula: B – D Write a program that prompts the user to enter the starting population, birth and death rates, and n, the number of years. The program should then calculate and print the estimated population after n years. Your program must have at least the following functions: 1. growthRate: This function takes its parameters the birth and death rates, and it returns the population growth rate. 2. estimatedPopulation: This function takes its parameters the current population, population growth rate, and n, the number of years. It returns the estimated population after n years Your program should not accept a negative birth rate, negative death rate, or a population less than 2.

1 6291

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Un-Answered Questions { C++ General }

What is string in c++ programming?

1275

Is c++ still in demand?

1200

Describe about storage allocation and scope of global, extern, static, local and register variables?

1301

Arrange Doubly linked list in the ascending order of its integral value and replace integer 5 with 7?

4168

How can we read/write Structures from/to data files?

1184

Define private, protected and public access control.

1167

What is format for defining a structure?

1135

What is data types c++?

1069

When are exception objects created?

1124

What is the difference between c++ and turbo c++?

1297

What is setbase c++?

1204

What is the two main roles of operating system?

1124

What is lazy initialization in c++?

1155

What is a far pointer? where we use it?

1129

What is the need of a destructor? Explain with the help of an example.

1087

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