高频题（0）
1. how would you improve it
what are you 3 favorite products, choose 1 and how would you improve it
2. What do you do
You are the GM of Disneyland. You want to lower the length of the waiting lines. What do you do?
3. CSV String Parsing and Object Transformation
Write a function that takes a CSV string as input, representing payment data, and returns a list of objects representing the parsed card data. The input string contains card entries with the following fields: customer_id, card_id, first_name, last_name, card_number, and expiration. The fields are comma-separated, and there are no commas or whitespace surrounding the field values. The data has been pre-validated and only includes active cards with expiration dates in the 21st century. Your function should combine the first and last names into a single 'cardholder_name' field and parse the expiration date into separate 'exp_month' and 'exp_year' fields. Include tests to verify the behavior of your function.
4. Stripe Interview Coding Challenge
The coding challenge consists of a two-part task. Part 1: You are given a CSV file and you need to process it in a specific format. Part 2: On the basis of Part 1, you are provided with an additional input, which is a CSV file containing user IDs and emails. You are required to merge the information from both CSV files and output it in the same format as Part 1.
