Time to give back some update:
Screening:
Q1- 1004. Max Consecutive Ones III But Variant ('W' and 'T' instead of 0 and 1s) Exactly like Minmer explained in their first variant.

Q2. 1047. Remove All Adjacent Duplicates In String But againVariant (Remove ALL duplicates) Exactly like Minmer explained in their variant.

First round:
Q3. 415. Add Strings
Q4. 380. Insert Delete GetRandom O(1)

Behavioral:

1. What was an chievement you are most prod of
2. Your failure ....

I will update you with the next round.