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Microsoft Interview Question for Software Engineer/Developer (Fresher) about Data Structure

(2 posts)

1. 

   jyoti
   guest
   Posted 4 months ago #
   
   

   Design a data structure which will support the following operation : given a seven letter word, return all valid words which are anagrams of this word. He wanted a data structure which would be optimized for space, and another one optimized for time.
   Write the code to implement the aforementioned function given the data structure.

2. 

   Dedicated Programmer
   Member
   Posted 4 months ago #
   
   

   As the string contains 7 characters,total number of anagrams would be 7!.The recursive program may be like this.

   #include <stdio.h>
   #define SIZE 7

   void Anagram(int depth,char *Orig,int *track,char *Permut)
   {
   int i,j;
   if(depth==SIZE)
   {
   for(j=0;j<SIZE;j++)
   printf("%c",Permut[j]);
   printf("\n");
   }
   else
   {
   for(i=0;i<SIZE;i++)
   {
   if(!track[i])
   {
   track[i]=1; //to indicate that ith character has been taken
   Permut[depth]=Orig[i];
   Anagram(depth+1,Orig,track,Permut);
   track[i]=0;
   }
   }
   }
   }

   int main()
   {
   char Original[SIZE],Permutation[SIZE];
   int track[SIZE]={0},n; //track[] keeps track of the characters that have already been taken.
   printf("Enter characters \n");\
   for(n=0;n<SIZE;n++)
   scanf("%c",&Original[n]);

   Anagram(0,Original,track,Permutation);
   return 0;
   }

   if the characters are repeated,it assume them different.
   correct me if mistaken.

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