First there was an online test in codality which I did well and then I was invited to the first interview which unfortunately I did not pass.

There were two questions, the first I answered but too slow(I should have done it in 40 minutes but it took hour and 15 minutes. The second question I answered partially.

FIRST QUESTION: Write a function that gets a matrix of integers as a parameter and returns the second largest integer, but you should loop the matrix only once, and consider all edge cases (including one row, one column, one value in all elements and so forth. (you need too think about them yourself but I mentioned almost all of them) need to solve in c.

SECOND QUESTION: You short function in c that returns a string (char*) and you need first to say what is the problem with it. So the problem is that the returned string is not allocated. So you need to allocate with malloc, and mention that the function caller needs to free the returned value, or you can just get the string as additional parameter. Finally the hard part is to solve it with a global parameter (the string) and locks and keys so no one else can use the string.