I am in the 1st round of the process. The interview is about 45 minutes.

It starts with an introduction which lasts about 5 minutes.

This is followed by two question walkthroughs, which include:

• Asking questions to clarify the problem statement.
• Describing your thinking process.
• Writing pseudocode.
• Going over the code with an example.
• Analyzing the time and space complexity.

After the two questions, there will be a Q&A session.

1. Find the sum of nodes within a given range in a Binary Search Tree (BST).

2. Sort a string according to a new, specified order.