Start by clarifying the requirements and edge cases, then outline a function that iterates through each record, checks for missing fields, validates the descriptor length, and performs a case-insensitive blocklist check. Emphasize efficiency (e.g., using a set for the blocklist) and discuss trade-offs like normalization (trimming whitespace) and handling of special characters.
Pro tip: Mention that you would normalize the descriptor (e.g., trim whitespace and convert to lowercase) before length and blocklist checks to avoid false negatives, and discuss how to handle Unicode characters if relevant.
Ask about the exact KYC fields, the allowed length range for the descriptor, and whether the blocklist matching should consider substrings or exact matches. Also clarify how to handle whitespace and case sensitivity.
For each record, check that all 6 fields are present and non-empty. Then validate the statement descriptor: trim it, check its length against the allowed range, and check if it matches any blocklist entry case-insensitively.
Convert the blocklist to a set of lowercase strings for O(1) lookups. If the blocklist is large, consider a trie or other data structure for efficient matching.
Decide on behavior for null/undefined fields, empty strings after trimming, and descriptors with leading/trailing spaces. Return an array of 'VERIFIED' or 'NOT_VERIFIED' corresponding to each record.
Talk about time/space complexity, potential false positives/negatives, and how you would test the function with unit tests covering missing fields, boundary lengths, and blocklist matches.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.