At some point you’ll need to practise with friends or spouse and children who can give some helpful responses. Nevertheless, in case you really want the best possible preparing for the case job interview, you can also want to work with ex-consultants which have expertise working interviews at McKinsey, https://johnathanfpkwt.blogs100.com/31076852/new-step-by-step-map-for-help-with-case-study