Top 3 Words Function | Dataford Interview Questions

Write a function to return the top 3 words from a list starting with a specific letter.

Implement def top_three_words(words, letter):. Match words case-insensitively, count each matching word, and return up to three unique words in descending frequency order. Break ties alphabetically. Return words in lowercase. If no words match, return an empty list.

Example: words = ["Apple", "apricot", "apple", "avocado"], letter = "a" returns ["apple", "apricot", "avocado"].

Constraints: 1 <= len(words) <= 10^4; each word contains alphabetic characters; letter is one alphabetic character.

Constraints

1 <= len(words) <= 10^4
1 <= len(word) <= 100
Each word contains alphabetic characters only
letter is exactly one alphabetic character
Matching and output are case-insensitive

Function Signature

def top_three_words(words, letter):

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