WD Firmware Developer interview questions

The interviewer was friendly, but did not have any idea about C++. My interview was an hour-long, but few of my friends had interviews for just 15 mins. The interviewer had no idea about checking a prime number using sqaure root of given number.

I got through employee referral. Interview consists of 2 technical rounds and one hr round. Questions will be asked based on resume. I applied for one year experience position. Difference between *p+1 and p*+1. Missing number in an array. Car wheels puzzles.