Page 258 - DCAP405_SOFTWARE_ENGINEERING

Software Engineering

Notes (ii) A network schema
(a) restricts the structure to a one-to-many relationship
(b) permits many-to-many relationships
(c) stores data in tables
(d) none of the above
(iii) In a relational schema, each tuple is divided into fields called
(a) Relations (b) Domains
(c) Queries (d) None of the above
(iv) Which of the following is not a logical database structure?
(a) tree (b) relational
(c) network (d) chain
(v) The relational model uses some unfamiliar terminology. A tuple is equivalent to a
(a) network (b) field
(c) file (d) data base
Answers: Self Assessment

1. data values 2. data model
3. relation 4. tuple
5. network data model 6. entity
7. attributes 8. graphically
9. physical 10. Null-valued or Non-Null-valued
11. Multiplicity 12. Derivable
13. E-R model 14. Binary
15. ER components
14.9 Further Readings

Books Elmasari Navathe, Fundamentals of Database Systems, Third Edition, Pearson
Education Asia
Peter Rob, Carlos Coronel, Database Systems: Design, Implementation, and
Management, Seventh Edition, Thomson Learning
Raghu Ramakrishnan, Johannes Gehrke, Database Management Systems, Third
Edition, McGraw-Hill, Higher Education
Silberschatz, Korth, Sudarshan, Database System Concepts, Fourth Edition,
McGraw-Hill

Online links http://en.wikipedia.org/wiki/Data_modeling
http://en.wikipedia.org/wiki/Data_model

250 LOVELY PROFESSIONAL UNIVERSITY