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Reg. No.: National Institute of Technology Karnataka, Surathkal Department of Computer Engineering Class Test -1 (20.08.2008) Subject: Database Systems [CO301] Marks: 15 1. A Data Base Management system allows simultaneous access to multiple file. True/False, Justify. Ans: True 2. A logical scheme is a standard way of organizing information into accessible parts. True/False, Justify. Ans: True 3. In order to use a DBMS. It is important to understand the physical schema. True/False, Justify. Ans: False, One subschema 4. In a large DBMS each user can access every subschema. True/False, Justify. Ans: False, each user can “see” only a small part of the entire database. 5. Goals for the design of the logical schema include being able to access data efficiently. True/False, Justify. Ans: True 6. If a piece of data is stored in two places in the database then, storage space is wasted. True/False, Justify. Ans: True 7. A network schema permits many-to-many relationships. True/False, Justify. Ans: True 1 8. In relational schema each field is divided into fields called Queries. True/False, Justify. Ans: False, Domains 9. A query is a miniature program that tells the DBMS what to do. True/false, Justify. Ans: True 10. A data dictionary is a special file that contains the names of all fields in all files. True/False, Justify. Ans: True 11. A good query system can be accessed only by data processing professionals. True/False, Justify. Ans: False, allows non-programmer to access information stored in a database. 12. A phone number in a database is an example of a Record. True/False, Justify. Ans: False, field 13. In a database related fields are grouped to form file. True/false, Justify. Ans: False, Data Records 14. ____________________ Database handles full text data, images, audio and video. Ans: Multimedia 15. Program/data independence is not an advantage of the data- base approach. True/false, Justify. Ans: False, it is. *** BEST OF LUCK *** 2