McKinsey interview process and practice questions

Behavioral questions

1. Tell me about a time you persuaded someone who disagreed with you.

   A good answer covers

   • Who they were, what they believed, and why their view made sense to them
   • What you did and said at each step, including what you changed after their pushback
   • The result, and how the relationship stood afterwards

2. Tell me about a time you led a team through a difficult situation.

   A good answer covers

   • What made it difficult and what was at stake for the team
   • The specific things you did as the leader, not what 'we' did
   • The outcome, and what you'd do differently next time

3. Tell me about a time you set yourself an ambitious goal and kept going when it got hard.

   A good answer covers

   • Why the goal was ambitious for you at the time
   • The obstacles and how you got past each one yourself
   • What you achieved, with a number or clear outcome

4. Tell me about a time you brought together people with different views and made sure everyone was heard.

   A good answer covers

   • Who was involved and why some voices were being missed
   • What you did to draw them in and use their ideas
   • How the result was better because of it

5. Tell me about a time you pushed for a change that others were comfortable without.

   A good answer covers

   • Why the change was needed and what the resistance was
   • The risk you took personally in pushing for it
   • How you won people over, and what changed as a result

Role and technical questions

1. Our client's profits fell 15% this year. How would you work out why?

   A good answer covers

   • A short structure first: revenue (price, volume, mix) and costs (fixed, variable)
   • Comparing with competitors and past years to see if it's the market or the client
   • A hypothesis, the data you'd ask for to test it, and a summary with next steps

2. A regional airline is thinking about starting flights to a new country. How would you decide whether it should?

   A good answer covers

   • The airline's goal and what success means: profit, growth or network strength
   • Market size and demand, competitors on the route, costs and the airline's own capabilities
   • A recommendation with the key risk and what you'd check before committing

3. How would you estimate the number of fuel stations needed in Bengaluru? Talk me through your numbers.

   A good answer covers

   • Starting from vehicles and how often each needs fuel
   • How many vehicles one station can serve in a day, with rounded assumptions
   • A final number and a quick check against what you'd expect to see

4. A hospital wants to cut waiting times in its emergency department. How would you structure the problem?

   A good answer covers

   • Following the patient's journey: arrival, triage, tests, treatment and discharge or admission
   • Finding the bottleneck with data: where patients wait longest and at what times
   • Practical fixes for the biggest bottleneck and how you'd measure the effect

5. Your client's revenue is growing, but its market share is falling. What does that tell you, and what would you look at next?

   A good answer covers

   • That the market is growing faster than the client
   • Which segments, regions or channels competitors are winning, and why
   • Whether this matters for the client's goals, and what to do about it

6. If a store's costs are 80% of its revenue, and revenue rises 8% while costs rise 12%, what happens to its profit margin? Talk me through it.

   A good answer covers

   • Setting revenue at 100: costs go from 80 to about 90 and revenue to 108
   • Profit falls from 20 to about 18, so the margin drops from 20% to about 17%
   • What that means for the client in one sentence

7. A consumer goods company is deciding whether to buy a smaller rival. What would you want to know before recommending it?

   A good answer covers

   • Why it wants the deal: growth, new products, customers or cost savings
   • The target's market, profitability and fit, and realistic savings from combining
   • Price versus value, the main risks, and a clear yes or no with conditions

8. How would you explain to a client's chief executive what a machine-learning model can and can't do for their pricing?

   A good answer covers

   • In plain words: it finds patterns in past sales to suggest prices
   • What it needs: clean data, enough history, and people who check its suggestions
   • Its limits: new situations, bias in past data, and how you'd test it safely first

Why McKinsey? Fit and HR questions

1. Why McKinsey, and why consulting rather than a role in industry?

   A good answer covers

   • What you want from consulting: variety of problems, learning speed, impact on clients
   • Something specific about McKinsey you've learnt from its people or work
   • How it fits where you want to be in a few years

2. Which industry or kind of problem would you most like to work on here, and why?

   A good answer covers

   • A specific choice, not 'anything'
   • Why it interests you, shown by something you've read, studied or done
   • What you'd bring to that work

Tips

• Structure every case answer out loud before you solve it.
• Prepare one deep story per personal experience theme; they'll probe it for 10–15 minutes.
• Do case maths out loud with round numbers, say the units, and sanity-check the answer against the real world.
• End each case with a clear recommendation, the main risk and what you'd check next, even if you haven't covered everything.
• In the personal experience interview, choose stories where you personally made the difference; expect questions on what you thought, said and did at each step.
• Practise with a partner who changes the facts mid-case, so a new question or chart doesn't throw you.