This is another question that is perhaps too generic for a good answer. A basic method of analyzing the data in an employee table would be a statement like below, where EMPLOYEE is your employee table.
SELECT COUNT(*)
FROM EMPLOYEE
This would tell you the number of rows in the table, but that wouldn't likely get you a job.
I suggest doing more study before considering job interviews. If you don't know where to look, consider working through the training kit for Microsoft Exam 40-461, available on Amazon here. This would take a lot of work, but would put you in a much better place for job interviews.