Round 1
Questions: Given an array and two indices, i and j, you need to rotate the array to produce a sequence where the elements are arranged from 0 to i, followed by j to i in reverse, and finally j to n-1.
Candidate's Approach
The candidate proposed two potential approaches: solving it in-memory or using a sliding window technique combined with binary search to handle the rotation.
- Implemented the solution by arranging the elements from 0 to i.
- Used binary search to efficiently rotate the elements from j to i and appended them to the result.
- Handled the section from j to n-1.
- Suggested using a hashmap to process and periodically flush chunks of data for very large datasets or streaming data.
Interviewer's Feedback
The interviewer accepted the solution after reviewing all the test cases and edge cases, stating, "This looks good."