This took a bit longer than expected, stretching over several weeks.

The technical rounds were intense, featuring an LRU cache implementation and a problem on detecting duplicate transactions within a 60-second window.

I was nervous at first, but it clicked for me when I realized I had practiced a similar approach on PracHub just days before.

Unfortunately, I didn’t receive an offer in the end, but the experience was a solid learning opportunity. The behavioral questions felt straightforward, so I wish I had made a stronger impression in the technical segments.

Implement an LRU cache with get and put operating in O(1).

Given a stream of transactions, detect duplicates within a 60-second window.