I interviewed with eBay shortly after graduating college in December 2013. The interview was at PayPal's headquarters.

The process consisted of:

• Two phone interviews
• A final onsite interview, which consisted of five hour-long one-on-one interviews (four technical and one behavioral).

The technical questions covered a wide range of areas, which I appreciated. The areas included:

• Object-oriented design
• Architecture design
• Problem-solving/algorithms
• Objective-C (blocks, view controllers, etc.)
• Mobile-specific questions

The most difficult question I was asked was to design a document upload/fetcher system for mobile (kind of like Dropbox for the iPhone). The difficulty was really in all the details of the problem, such as caching, database modeling, security, and sessions.

Algorithm questions ranged from binary tree search to array pattern searching. The most unexpected question was when the interviewer gave me a stream of digits and asked me to find the pattern. I got really stumped on this problem; it was my last interview of the day, and I just blanked out.

I guess I did well enough throughout the day because I got the job. By no means an easy interview, but not extremely hard. I was extremely well-prepared, as I had been interviewing for a while. I'd say it's on the average to difficult scale. If you are bad at architecting systems, then this interview would have been HIGHLY difficult.