Goldman Sachs Developer interview questions

/* Problem Name is &&& Second Smallest &&& PLEASE DO NOT REMOVE THIS LINE. */ /** * Instructions to candidate. * 1) Run this code in the REPL to observe its behaviour. The * execution entry point is main(). * 2) Consider adding some additional tests in doTestsPass(). * 3) Implement secondSmallest() correctly. * 4) If time permits, some possible follow-ups. */ /** * Returns the second smallest element in the array x. * Returns 0 if the array has fewer than 2 elements. */ // [1, 0 ,2] function secondSmallest(x) { // todo: implement this function var smallest = Infinity, smallestDiff = Infinity, diffArray = []; for(var i=0; i<x.length; i++){ if(x[i] <= smallest){ smallest = x[i]; } } for(var j=0; j<x.length; j++){ if(x[j] !== smallest){ diffArray.push(x[j] - smallest); } } for(var k=0; k<diffArray.length; k++){ //smallest diff if(diffArray[k] <= smallestDiff){ smallestDiff = diffArray[k]; } } return smallest + smallestDiff; }

In interview they asked me a question related to convex hull.