# Algorithms | Misc | Question 11

In the above question, if array A is made to hold the string “abcde”, which of the above four test cases will be successful in exposing the flaw in this procedure?
(A) None
(B) 2 only
(C) 3 and 4 only
(D) 4 only

Explanation:

 `#include ` `#include ` ` `  `void` `find_and_replace(``char` `*A, ``char` `*oldc, ``char` `*newc) { ` `    ``for` `(``int` `i = 0; i < 5; i++) ` `       ``for` `(``int` `j = 0; j < 3; j++) ` `           ``if` `(A[i] == oldc[j]) A[i] = newc[j]; ` `} ` ` `  `int` `main() ` `{ ` `    ``char` `*oldc1 = ``"abc"``, *newc1 = ``"dab"``; ` `    ``char` `*oldc2 = ``"cde"``, *newc2 = ``"bcd"``; ` `    ``char` `*oldc3 = ``"bca"``, *newc3 = ``"cda"``; ` `    ``char` `*oldc4 = ``"abc"``, *newc4 = ``"bac"``; ` ` `  `    ``char` `test[] =  ``"abcde"``; ` ` `  `    ``printf``(``"Test 2\n"``); ` `    ``printf``(``"%s\n"``, test); ` `    ``find_and_replace(test, oldc2, newc2); ` `    ``printf` `(``"%s\n"``, test); ` ` `  `    ``printf``(``"\nTest 3\n"``); ` `    ``strcpy``(test, ``"abcde"``); ` `    ``printf``(``"%s\n"``, test); ` `    ``find_and_replace(test, oldc3, newc3); ` `    ``printf` `(``"%s\n"``, test); ` ` `  `    ``printf``(``"\nTest 4\n"``); ` `    ``strcpy``(test, ``"abcde"``); ` `    ``printf``(``"%s\n"``, test); ` `    ``find_and_replace(test, oldc4, newc4); ` `    ``printf` `(``"%s\n"``, test); ` `} `

Output:

```Test 2
abcde
abbcd

Test 3
abcde