Yammer Software Engineer interview questions

After 1 month of being passed around to different unresponsive recruiters and hiring managers, I was finally given the take home challenge. The challenge contained three generic "write a function that does X" type questions. I finished the challenge in time and double checked that it met all the requirements. Shortly afterwards I received an email saying I was rejected and would not be able to receive feedback on my challenge. Overall the entire process was uncoordinated, unprofessional, and (in my biased opinion) led to the wrong conclusion.

Lots of interviews one after the other. Interview contacted by microsoft then location chosen as SF, then hired at Yammer as SF employee. Good experience thus far. Interview process was actually really smooth.