K-Rise Systems interview questions

Write an algorithm that uses an implied user input of x number of days and converts it to whole years, then use the remainder to calculate whole weeks, and then use final remainder to calculate hours.

Company ABC sells books to various bookstores across the country. They often have to take payment by credit cards when these bookstores place orders. These bookstores (approved customers of ABC) would like ABC to store their credit card numbers under various payment names so that their employees can just call ABC and use the saved payment names to place orders. This allows bookstores to avoid revealing their actual credit card numbers to new employees. Make a database schema and be prepared to talk about the situation.