This just got in: Second shot is back! You can now retake your exam for free, until jan 12 2016. Yay! Go get ’em… More info here
If either you are doing your SSIS by hand or using the BIML framework, you’ve came across the expressions and the expression-builder. This is a helper list, with my most often used, and wich are allways forgotten when I need them, of my commonly used SSIS expressions.