QuantumBlack Data Engineer Interviews

I have my final round interviews coming up with McKinsey (QuantumBlack – Data Engineer), and I’d really appreciate some guidance from those who’ve been through this stage.

From what I understand, the final round will include:

• Technical Expertise Interview (TEI) + PEI

• Problem Solving Scenario (PSS) + PEI
  
  How different is the partner-led PSS compared to earlier rounds?

  Any tips on structuring answers better under pressure?
  
  Should I expect the case studies (especially in the PSS/partner round) to be more technically focused given my background, or are they typically a mix of both business and technical problem-solving?

  
  Would really appreciate any advice, especially from people who recently went through final rounds.
  
  Thanks