C++ Code Interview Questions
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what is the best algorithm to sort out unique words from a list of more than 10 million words(1 crore+)? we need the best technique in the terms of execution time.


9 13372

How to Split Strings with Regex in Managed C++ Applications?



Code for Method of Handling Factorials of Any Size?


Code for Easily Using Hash Table?


Code for Two Classes for Doing Gzip in Memory?


Code for Small C++ Class to Transform Any Static Control into a Hyperlink Control?



Write A C++ Program To Input A Number Between 20 To 99 And Display Its Numbername?


3 10599

Given 1 to n distinct random number of which n+1th element was duplicated. How do find the duplicate element and explain the time complexity of the algorithm.

Microsoft, NetApp,


Given 1 to n random number, find top 10 maximum numbers and explain the time complexity of the algorithm.

NetApp, IMO,

1 5277

Deriving time complexity of Binary tree and AVL tree, step by step.


4 12728

How reader and writer problem was implemented and come up with effective solution for reader and writer problem in case we have n readers and 1 writer.

Microsoft, NetApp,

6 14901

What is the time complexity T(n) of the following program? a) int n, d, i, j; cin >> n; for (d=1; d<=n; d++) for (i=1; i<=d; i++) for (j=1; j<=n; j += n/10) cout << d << " " << i << " " << j << endl; b) void main() { int n, s, t; cin >> n; for (s = 1; s <= n/4; s++) {t = s; while (t >= 1) { cout << s << " " << t << endl; t--; } } } c) void main() { int n, r, s, t; cin >> n; for (r = 2; r <= n; r = r * 2) for (s = 1; s <= n/4; s++) { t = s; while (t >= 1) { cout << s << " " << t << endl; t--; } } }

Infosys, IBM, CTS, Qatar University,

3 7005

Coin Problem You are given 9 gold coins that look identical. One is counterfeit and weighs a bit greater than the others, but the difference is very small that only a balance scale can tell it from the real one. You have a balance scale that costs 25 USD per weighing. Give an algorithm that finds the counterfeit coin with as little weighting as possible. Of primary importance is that your algorithm is correct; of secondary importance is that your algorithm truly uses the minimum number of weightings possible. HINT: THE BEST ALGORITHM USES ONLY 2 WEIGHINGS!!!

Qatar University, Motorola,

1 12945

Show by induction that 2n > n2, for all n > 4.

Qatar University, Karvy,

2 4979

Performance Algorithm A performs 10n2 basic operations and algorithm B performs 300 lg n basic operations. For what value of n does algorithm B start to show its better performance?

Qatar University, ASD Lab, UNV,


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Un-Answered Questions { C++ Code }

can you please write a program for deadlock that can detect deadlock and to prevent deadlock.


A suduco given & u hv 2 check if it is incomplete(blanks left),or correct or incorrect


Performance Algorithm A performs 10n2 basic operations and algorithm B performs 300 lg n basic operations. For what value of n does algorithm B start to show its better performance?


Implement a command console for changing settings on a particular object. The command console should allow you to enter a string and will return the response (very similar to a terminal session). The commands are as follows: SET propertyname=newvalue will change the target object’s member named “propertyname” to have a value equal to “newvalue”. If the input value is incompatible (i.e. an int being set to a string), print out an appropriate error message. GET propertyname will print out the current value of the target object’s member named “propertyname”. GET * will print out a list of all target object members and their current values. The system should be extensible for future commands and should accept an arbitrary object, such that another developer could insert another object into the system and rely on the command console to get and set the properties correctly.


i don't know about working of nested for loop can any one help me


write a function that allocates memory for a single data type passed as a parameter.the function uses the new operator and return a pointer to the allocated memory.the function must catch and handle any exception during allocation


write a program using 2 D that searches a number and display the number of items 12 inputs values input 15,20, 13, 30, 38, 40,16, 18, 20 ,18 ,20 enter no. to search : 20


write a program that creates a sequenced array of numbers starting with 1 and alternately add 1 and then 2 to create the text number in the series , as shown below. 1,33,4,6,7,9,............147,148,150 Then , using a binary search , searches the array 100 times using randomly generated targets in the range of 1 to 150


What output does this program generate as shown? Why? class A { A() { cout << "A::A()" << endl; } ~A() { cout << "A::~A()" << endl; throw "A::exception"; } }; class B { B() { cout << "B::B()" << endl; throw "B::exception"; } ~B() { cout << "B::~B()"; } }; int main(int, char**) { try { cout << "Entering try...catch block" << endl; A objectA; B objectB; cout << "Exiting try...catch block" << endl; } catch (char* ex) { cout << ex << endl; } return 0; }


how to diplay a external image of output on winxp by using c & c++,


3. Program to find the Sum of give series. a. (1)+(1+2)+(1+2+3)+(1+2+3+4)+……………………………….. b. 1/1+1/9+1/25+1/49+……………...


create a stucture student containing field for roll no,class,year and marks.create 10 student annd store them in a file


Code for Easily Using Hash Table?


Write a C++ program without using any loop (if, for, while etc) to print prime numbers from 1 to 100 and 100 to 1 (Do not use 200 print statements!!!)


write a program to convert temperature from fa height into celcius and vise versa,use modular programming