Are there any "Problems and Solutions" books or notes for advanced Quantum Field theory or/and String theory or/and Supersymmetry? I was wondering whether or not there are any good resources of the type "Problems and Solutions" on String theory, on Supersymmetry and on advanced Quantum Field theory (separately).  
[I am aware that there is a problems and solutions book on introductory Quantum Field theory by Radovanovic called "Problem book in Quantum Field theory" but it mostly covers material found in a first graduate-level Quantum field theory course.]
 A: I only know of one for quantum field theory at all: Problem Book in Quantum Field Theory by Voja Radovanovic, and it's introductory QFT level.
A: A recent book by François Gelis is in my opinion a fantastic book on QFT.
The first half of the book is all the basics up to and including non-abelian gauge theory. While the second half introduces unrelated modern concepts in each chapter. For example it has a very nice review on the spinor helicity formalism, etc
Lots of exercises and solutions at the end.
I highly recommend.
A: You can try the problem's on Peter van Nieuwenhuizen's website. Try the homework and exam problems from each iteration of the course.
A: A solution manual for Polchinski's "String Theory" Is a truly wonderful solver for Polchinski's textbooks.
Probably the most difficult task when starting to study perturbative string theory is to reach the point at which you are comfortable with the formalism of two dimensional CFTs. For that A Collection of Exercises in Two-Dimensional Physics, Part 1 is a rather impressive source of useful tricks that can be used to mastering world-sheet techniques.
