Tcs Coding Questions 2021 Official

To master the "TCS Coding Questions 2021" pattern, follow this 3-week plan:

Based on student memory reports and discussion forums (like PrepInsta, GeeksforGeeks, Quora), the following topics dominated:

Problem Statement:
In a cricket match, the captain maintains a string of 'W' (wicket) and 'N' (normal ball). A bowler is said to have "fever" if he takes 3 consecutive wickets (i.e., "WWW"). Given a string, replace every such occurrence of "WWW" with "F" (fever) and print the modified string. However, if two fever patterns overlap (like "WWWW" -> contains two overlapping "WWW" starting at index 0 and 1), count it only once. Tcs Coding Questions 2021

Wait—The actual TCS 2021 version was simpler: Replace all non-overlapping "WWW" with "F". But overlapping should remain.

Actual Pattern (Overlap not allowed):
Input: "WWWNWWWNW"
Output: "FNWFNW" (first three W→F, then single N, then next three W→F, then N, then single W). To master the "TCS Coding Questions 2021" pattern,

Solution (C++):

#include <iostream>
#include <string>
using namespace std;
int main() 
string s;
cin >> s;
string result = "";
int i = 0;
while(i < s.length()) 
if(i+2 < s.length() && s[i]=='W' && s[i+1]=='W' && s[i+2]=='W') 
result += 'F';
i += 3;  // skip ahead to avoid overlap
 else 
result += s[i];
i++;
cout << result << endl;
return 0;
 Key learning: Many lost marks by using replace()

Key learning: Many lost marks by using replace() in Python without controlling overlap.