Mastercard Software Engineer interview questions

The most unresponsive HR I've ever seen. Applied online, got an email from recruiter who scheduled for a initial screening call. Did not call. No message no nothing. Followed up through email to figure out whats going on. Got a response a business day after, and scheduled a call few hours later. Said she would get back in 2 - 3 days. A week has passed. Nothing. I'm sort of glad that I'm not wasting my time through the interview process. Even the bigger tech companies are more responsive.

I was brought in for an on-campus interview on Monday (45 minutes) (I was asked House Robber, and House Robber II). I was called back for another on-campus interview on Wednesday (45 minute) (I was asked to develop an algorithm to win Bananagrams). That evening, I was called back for an all-day interview on Friday (4 45 interviews). All the interviews were very good, and gave good feedback when I asked a question. I got an offer on Thursday the week after my interview.