Pergunta de entrevista da empresa Capgemini

1.What are Sessions and Cookies ? 2.Questions on OOPS concept, inheritance , method overloading and overriding , static method 3 .Questions on strings and integer variables used in php , 4.What will be the output of below program $a = "PHP"; $a = $a + 1; echo $a; 5.Versioning control Tool - git what do git command git stash do ? 6.Types of errors in PHP 7.Working of MVC framework 8.Difference between helpers and library 9.How hooks are implemented in CI