residual risk vs tracking error

[ara1523]

Why is the term “residual risk” used in the meaning of “tracking error” in http://www.garp.org/media/613028/frm practice exam052711.pdf , problem 9, on page 22?
Expected residual return = information ratio * residual risk

 

[ksh29]

I just started reading this. From what I understood, Tracking error is the standard deviation between portfolio return and benchmark return. So, residual risk is like the remaining risk comparing with benchmark represent by standard deviation.

 

[ara1523]

And tracking error, mot residual risk, is in the denominator of information ratio.
Residual risk is orthogonal to benchmark, but tracking error is not

 

[epyon96]

Can you post a link to the 2012 GARP exams. I hate the software they force you to download to obtain them.