d Can result in many-to-one mappings (i.e., multiple keys to same locationl d) Require collision resolution schemes as well O e) All of the above D Question 18 4 pts h. n (sqlurestona diabe ihich f th o O al The schema describes the structure of the database's information ? b) The database state represents an example of data stored at a particular point in time according to the schema O) Database schemas cannot be modified by users d Database schemas are updated much less frequently than database state/instances 4 pts D Question 19 Consider a large relational database which stores 5 attributes for each company employee, le., unique corporate ID number, social security number (SSN), name, date of birth, work division. Which