Amazon Software Development Engineer Intern interview questions

Applied through the college recruiting for Amzn. Had two rounds of interview. The first interviewer focused on design pattern questions- why this specific design over the other design pattern for this particular question. The second interviewer asked me questions on the projects, asked a few questions on hashtables, Array manipulations. This was basically a problem solving and algorithms round- asked me a variation of knapsack problem.

The first round consisted of online test containing 20 msqs and 2 coding questions.. the next was interview roung..