content: function getQuestions()
    return {
      addTwoNumbers: [
        {
          input: [[2,4,3], [2,4,3]]
          expectedOutput: [7, 0, 8]
        },
        {
          input: [[0], [0]]
          expectedOutput: [0]
        },
        {
          input: [[9,9,9,9,9,9,9], [9,9,9,9]]
          expectedOutput: [8,9,9,9,0,0,0,1]
        }
      ]
      longestSubstringWithoutRepeatingCharacters: [
        {
          input: ["abcabcbb"]
          expectedOutput: 3
        },
        {
          input: ["bbbbb"]
          expectedOutput: 1
        },
        {
          input: ["pwwkew"]
          expectedOutput: 3
        }
      ]
      longestPalindromicSubstring: [
        {
          input: ["babad"]
          expectedOutput: "bab"
        },
        {
          input: ["cbbd"]
          expectedOutput: "bb"
        }
      ]
    }
  end function
  