Quite hard for a lot of technical questions that will require algorithms. It will be necessary to have multiple cases for you to figure out the best approach to a solution. It will require time to get more practice on the algorithm questions, so please go to LeetCode.

Try more questions from LeetCode, especially hard questions on those ranking boards.

Be sensible with the answers.

Please explain the best sorting method for a B-tree.

Please just use a Red-Black tree to solve the question.