11. How can you get more information from the same amount of data by using a database approach instead of a nondatabase approach? 12. What is meant by the sharing of data? 13. What is a DBA? What kinds of responsibilities does a DBA have in a database environment? 14. How does consistency result from controlling redundancy? 15. What is an integrity constraint? When does a database have integrity? 16. What is security? How does a DBMS provide security? 17. What is data independence? Why is it desirable? 18. How is file size a disadvantage in a database environment? 19. How can the complexity of a DBMS be a disadvantage? 20. Why can a failure in a database environment be more serious than an error in a nondatabase environment? 21. Why might recovery of data be more difficult in a database environment? 22. If a database is not maintained or if incorrect data is entered into the database, serious problems can occur. What problems could occur if a student database is not maintained? 23. An attribute is a characteristic or property of an entity. If person is an entity, would the same attributes be used to describe a person in different databases that store medical, student, and fitness club data? Why or why not