Meta E5 interview

Phone Screen

Questions:

1. Subarray Sum Equals K
2. Palindrome Permutation

Virtual Onsite

Questions:

1. Coding Round 1

   • Count Number of Monotonic Sequences in an Array
   • K Closest Points to Origin - Implemented the heap solution.

2. Coding Round 2

   • Valid Number - Initially missed the test case "05" which should return false; corrected after the interviewer pointed it out.
   • Simplify Path - A variation was asked where we are at a current path and a relative path is given. We need to simplify the target path and then navigate from the current to target. Implemented the stack solution.

3. ML System Design

   • The question was about a core ML - bot post detection ML pipeline instead of a system design problem as expected. Discussed specifics including data preprocessing, feature engineering, training, testing, and evaluation (online vs offline). The interviewer's reaction was unclear.