I recently went through the phone screening round for Google(L3 position).
I was asked a leetcode hard question based on stimulation and two queues.
The question was similar to this,
https://leetcode.com/problems/time-taken-to-cross-the-door/
I wrote the test cases , took some time to understand the problem statement and come up with the approach. Hence left with only 10 mins to write the code. Hence it does not went really well.

The mistakes I did :

• I did not asked the interviewer for the example test cases, thinking that it will be considered as a hint from interviewer.
• I did not ask clarifying questions, Previously I was using priority queue for my approach thinking that the array is not sorted.