Amazon SDE Intern interview questions

I had 2 technical rounds. In the first one, after the initial introduction, he asked me to write a program to find words (given in an array) from a grid which consisted of letters. The arrangement could be of any form, as long as the letters are adjacent. This took around 20-25 mins, with him dropping hints throughout, leading me towards an optimal solution. After around 3 hours, I had my second round. It was for around an hour, with them asking two coding questions.