Marvell Technology Engineer interview questions

there is some phone interviews, some engineers called me and asked a lot of questions, they give me a lot of time to find the answers, I can ask anyone for the answer, some questions do not have an answer, because there are no answer for these questions, do not understand why they ask questions which do not have answers

hiring process was smooth, and interview questions were moderate to tough. technical knowledge is well tested screening process is good and cut off percentage should be a bit more lesser than the current