ITTO questions can be as simple as "which of the following tool and techniques is used in scope control" to a scenario-based question. however, you will almost immediately realize while reading the question that it is an ITTO question.
no one likes memorizin' specially when it comes to sth as dry as the PMBok guide, in my case, i started something that i found very useful and will share it here. I created an excel sheet, mapped all the 42 processes as they appear in page 43 of the guide, added two extra columns to each process group, one on the left for the processes inputs and one on the right for the processes outputs, then I inserted the tools and tech. below the process somehow.
I didnt list all of them ITTOs, I selected the most important ones, not more than 3 maximum.
I realized while working on this sheet that I became more familiar with most of the ITTO's...
Observed which processes share the same inputs, outputs, tools & techniques...for example (outputs such as work performance measurements, change requests & updates are the outputs in almost all the processes in monitoring & controlling process group)...and many more.
this helped me alot. I ll share it with you if you care however, I strongly recommend that you start it yourself.