PCA / Secondaries Advisory - Interviews

Hello, looking to move to PCA / Secondaries advisory at the associate level. 

There's already been a good discussion on what to expect regarding technical questions. 

However, want to understand how common case studies are during PCA recruitment. 

i.e. if in the process for a PJT, CL, Evercore, Rede ect. should I expect LBO cases and be competent on building distribution waterfalls from scratch? or would it more focused on explaining them in an interview setting.

If I should be up to speed with building distribution waterfalls from scratch, would appreciate any course sources that have helped anyone in the past.

Thanks!