primary key used in a database is a of rows that are formed to identify a unique table or file or group of columns that identifies a unique row in a tal c) character or byte that represents fields or columns d) group of tables or files formed to identify a unique field or row 46) Which of the following is an international standard language for a) Paradox b) DB2 c) SQL d) MS Access 47) Companies buy and sell your data so they can a) Market products to you in a targeted way b) Know what you are up to on a daily basis c) Make sure you are ethical before selling to you d) Check for ethical behavior of employees 48) To normalize a database, you need to a) make sure the data is accurate b) ensure each table has only one type of object in it c) ensure that only normal people are in the database d) normalize the computer system the database runs 49) Which of the following is the distinguishing feature a) single location b) number of users c) bandwidth d) hardware requirements 50) A private internet that is used exclusively within