Frage im Vorstellungsgespräch bei Excellence Technosoft

the programs were like sum of all elements in array, second largest element in array,missing number in array, longest increasing subsequence in array(e.g.{1,5,9,2,3,0,7}= 1,2,3,7). in f2f puzzles and programs one or two. in system round forms and mysql through php, form validation(you can take help from the internet).