1. Suppose you know that every employee in your organization has a seven-digit ID number used for logging on to the computer system. A loop would be useful to guess every combination of seven digits in an ID. Are there any circumstances in which you should try to guess another employees ID number?

2. If every employee in an organization had a seven-digit ID number, guessing all the possible combinations would be a relatively easy programming task. How could you alter the format of employee IDs to make them more difficult to guess?