Last month, I was interviewed by ServiceNow. I had three rounds of technical interviews back-to-back, ranging from 30 minutes to 1.5 hours each. After that, I had a director round a few days later.

Overall, it looked like things were on the positive side. However, after waiting for three weeks and repeatedly asking for an update, I finally received an auto-generated reply stating that I am not being considered.

The interview itself was good, but the process was disappointing due to the delay in communicating the feedback, especially with no reason mentioned (though that is usual practice). Such experiences leave you wondering what went wrong.

I strongly feel that getting rejected after a few initial rounds of interview with an auto-generated email and no reason is understandable. But after all the rounds and after salary negotiation, if a company rejects, at least it should provide the reason, whatever it may be.

Store and retrieve a top priority task one by one with O(1) time complexity. This raises some detailed questioning.

Implement an LRU cache with O(1) time complexity.

Some design-related questions.