Big Rattle Technologies PHP Laravel Developer interview questions

1) what is reverse routing in Laravel 2) what is service container in Laravel 3) top 5 string function and array function in php and explain. 4) what is polymorphism 5) what is traits 6) what is trigger Store procedure and index Given 2 code test: 1) 54321 4321 321 21 1 using loop? 2) $array=array(1,2,3,2,4) remove duplicate elements from array without inbuilt function?