Amazon Front-End Engineer interview questions

I was contacted by a recruiter from Linkedin, and she asked some basic questions (such as work experience, why languages I used) on the phone, the following interview was an online test on Hackerrank.They gave me 1 hour to complete two questions, one of the questions was writing a tabs plugin by using Javascript, CSS and HTML.

The technical interview was divided in two parts, first part was a straight questionnaire on web development standards, trends and best practices which measured overall web development experience. The second part was a real time algorithm focused programming exercise that seemed like it was very much targeted towards Computer science students.