I had two phone interviews.

Interviewers asked standard questions very similar to those found on sites like LeetCode or CareerCup. These included problems involving:

• Traversing trees and graphs
• Working with matrices and vectors
• Identifying numbers with specific properties in sorted/unsorted arrays

In the first interview, I solved all three problems. In the second, I fully solved one problem and provided a suboptimal solution for another. I was nearly finished with the optimal solution but ran out of time.

Unfortunately, this was not enough to receive an offer.

Nothing special. Questions seemed to me almost the same as you can find here or on Careercup.