Reddwerks Corporation Senior Software Engineer interview questions

First round is standard HR go over the resume stuff, nothing tricky. Second round is technical. There was whiteboard coding. A group panel style, which I like more than one-on-one because if someone is not being clear, then another perspective can be sought out. 1. Object Orient Design of a warehouse with x number of shelves, each shelf is y unit wide, and there are a,b,c,d type of boxes (with varied size of units) 2. Tree traversal, better know recursion. 3. Java method for whether a given int is prime number (brute force is fine, didn't go into efficiency) Surprised that there wasn't any SQL questions.