“Based on this client engagement and your chosen service line, why did you apply to Deloitte over other professional services firms?”
What they test. Long-term commitment, organisational awareness and a clear grasp of the day-to-day work in that business unit.
Weak answer. Generic praise of Deloitte's size ('the biggest Big Four firm with the best prestige') paired with website copy.
Strong answer. Connects a specific Deloitte initiative, strategy or value directly to the sector work in the case study, with how your skills match a first-year's daily delivery.