18 19 20 21 22 Moving to the next question prevents changes to this answer. Question 9 What is a column OA. A support object to hold the roof. s. A column is a vertical entity in a table that contains all information associated with a specific field in a table. oc. It's not a vertical group of fields within a table. It's not a set of data values of a particular simple type. A Moving to the next question prevents changes to this answer. - A Moving to the next question prevents changes to this answer. Question 10 Properties of Databases A Data can be stored as long as required i.e. magnetic disks rather than computer memory) B. Can be used by multiple users simultaneously Link information about different elements to provide a complete picture D. All of the above A Moving to the next question prevents changes to this answer. > A Moving to the next question prevents changes to Question 11 A database administrator can A Create users B. Create privileges c. Grant privileges D. All of the above A Moving to the next question prevents changes to this ans! A Moving to the next question prevents changes to this answer. Question 12 In relational algebra, a selection... Choose the rows in a table that you want returned by a query. B. Selects the current date. c. Choose to design the query. D. Choose the cartesian product. A Moving to the next question prevents changes to this answer. 1 2 3 4 5 6 7 8 9 10 11 12 13 > A Moving to the next question prevents changes to this answer. Question 13 What is NULL value? Is a value in a field that appears to be blank." B. Is a field with no value. c It's not a space. Op. All the above. A Moving to the next question prevents changes to this