Mastercard interview questions

Got reached out by one of the recruiter from Mastercard, she said we need to fill this position asap and if i can appear for interview i asked her to schedule my interview after a weak she said we need this urgent and if you give interview early there are good chances we would be able to close this position asap, she asked me to schedule interview next day first round and if i clear that she would schedule 3 interviews back to back next day i gave first round cleared the interview next day i had to take leave just to appear for their so called urgent position i gave 3 rounds back to back she had told me after each round I'll give you your results immediately after all the 3 round of interview i didn't receive any call from her i gave her a call and asked for the interview result she said i have cleared the 3rd and 4th round also and she would update me about the 2nd round also in sometime but i never received any call from her i tried to reach out to her couple of time but each time the call went into voice message i sent her mail couple of times following on the same but didn't received anything in response. I didn't expected this kind of behavior at least when it came to Mastercard. with such big name the way they wasted my time was unimaginable TBH why to even waste someone times when you have no intention of hiring or responding to candidate when it comes to your call it becomes urgent and when it comes to candidate it becomes unnecessary no matter what the results are but the candidate have given his time and effort in appearing this interviews so they should be informed acc.

5 rounds of interviews focusing on mL, probability , statistics and puzzles, was asked case studies also. Some guesstimates were also asked like tell me the number of petrol bunks in india