I was rejected after the first interview which is being conducted by the direct TL.

After this interview,there is a full day of interviews (such in Microsoft/Google/etc)

Technology less matters than knowledge in algorithms

1. Draw an architecture of some kind.

2. Given a sequence of integers in an array, find the longest array with the highest value (for example 1, 3, -3, 4, 5) which is 4, 5, and return the positions of the start and end indexes in the array.

3. Learn a language that you don't know, e.g., Python in one hour, and implement 1.