Hikerank , BQ and microservice system. Mainly focus on the understanding of data strcuture, several BQ questions in the multi-working, few questions in how to desgin microservice system. Eg, how do you choose the fist partition of microservice

It was a frontend interview on hackerrank platform. There was three screens for html, css and JavaScript, asked to create a navigation component. HR informed me that it was going to be a data structures round with no language restriction. But in interview I found out it was a core skills round instead.