Question 1
Medium Given payloads arriving as (sequenceNumber, payload) pairs, release all contiguous payloads starting at the next expected sequence number whenever a new payload arrives. Buffer out-of-order payloads until gaps are filled, release each payload exactly once, and ignore duplicates already released. For example, (2, "B") yields [], then (1, "A") yields ["A", "B"], then (4, "D") yields [], then (3, "C") yields ["C", "D"].
Experience
The task required an ordered buffer that releases newly contiguous payloads while ignoring already released duplicates. The candidate also discussed past projects listed on the resume, but those projects were not detailed.