How to resolve WSOD (White Screen Of Death) error in drupal ?

Most of the times when you end up with some syntax errors you will see wsod white screen of death in drupal sites. To find the exact location of error copy paste below code in index.php file immediately after <?php tags to see the error location instead of wsod. Please find the code below.

error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);