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 20143

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

Lehman Brothers, Vision Infotech,

2 8924

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 9156

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

Infosys, Lehman Brothers,

11 29838

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 9226

Why would you make a destructor virtual?

Lehman Brothers,

3 9135

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

Lason,

16 30991

What C++ libraries are you proficient with?

Google,

1 9141

Which algorithm do you like the most? Why?

Google,

2 8666

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

Google,

2 8772

What is design pattern?

Samsung,

2 8824

What are advantages and disadvantages of Design patterns?

IBM, Vodafone,

7 110611

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 11011

what is importance of data sturture in a programming language?

L&T, TCS, Wipro,

22 48823

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 6218

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Un-Answered Questions { C++ General }

What is nested class in c++?

964

What is general form of pure virtual function? Explain?

1000

Why is swift so fast?

1128

What are c++ stream classes?

1048

What is :: operator in c++?

1056

Can malloc be used in c++?

1082

What is difference between c++ 11 and c++ 14?

1103

Define a constructor?

1050

Does std endl flush?

1040

Write a note about the virtual member function?

1060

Give 10 points of differences between C & C++.

1142

When must you use a pointer rather than a reference?

1042

Would you rather wait for quicksort, linear search, or bubble sort on a 200000 element array? (Or go to lunch...) a) Quicksort b) Linear Search c) Bubble Sort

1049

Do class declarations end with a semicolon?

1084

How would you differentiate between a pre and post increment operators while overloading?

1149

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