Expedia SWE Interview Question 2024 June | Backtracking | on-campus

Question 1: Letter Combinations of a Phone Number Problem Statement Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order. A mapping of digits to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters. 2: "abc", 3: "def", 4: "ghi", 5: "jkl", 6: "mno", 7: "pqrs", 8: "tuv", 9: "wxyz" Constraints 0 <= digits.length <= 4 ...