1. Write a function to implement the "cat" command in Linux
2. Find the first character that only appears once in the whole string

Question

1. Write a function to implement the "cat" command in Linux
2. Find the first character that only appears once in the whole string

Anonymous · Accepted Answer

1. Loop through all the characters for the string char array.
2. If you are doing this in Java, use indexOf and lastIndexOf methods.
3. If indexOf and lastIndexOf are same then you have found your first unique char. 

for(char character : input.toCharArray()) {
   if(input.indexOf(character) == input.lastIndexOf(character)) {
       print character;
       return;
   }
}

Itanium · Answer

import java.util.*;

public class HelloWorld{

     public static void main(String []args){
        System.out.println(unique("assaiieerrfufuqppp"));
     }
     
     
     public static char unique(String str) {
         Map freq = new LinkedHashMap();
         
         for(int i=0; i

Anonymous · Answer

2. Use ASCII characters as the indexex of an array and count the number of the characters in the string

-thowe- · Answer

Apparently you have been taught on a different level of programming than this. The questions are quite basic if you ever worked with Linux or UNIX. Perhaps check job requirements next time.

1)  cat concatenates the content of the second file to the content of the first and outputs it (to the screen unless redirected )

open file one 
until EOF    // end of file 
  c = getc file1  copies the content of the second file to the content of the first and outputs it the console
  print c 
close file 1
same for file 2


Question 2
  
The answer given previously would work but is perhaps tricky

Simpler (but more time-consuming) would be

go through the string from the first character to the last   // this needs a for-loop
   check if  the current character appears in the rest of the string  
           // another for loop from the current + 1 position of the string to the end 
       if that is the case 
           BINGO!
      otheriwise 
           go ahead

Bloomberg

Bloomberg Interview Question

Interview Answers

Want the inside scoop on your own company?

Bowls

Followed companies

Job searches