DATABASE AND CLIENT/SERVER APPLICATIONS ASSESSMENT 02 – ER DIAGRAMS

NAME: ____________________________________

INSTRUCTIONS1. Use the word processor on the computer to fill in this assessment. 2. Start by inserting your name in the space above. 3. After reviewing these questions, save this file with your answers to your computer using the required file name

format: “<YourStudentID> Assessment02.doc” where <YourStudentID> is your StudentID and there is a blank between it and the Assessment02. When you are finished with the assessment, save the document again and then upload it to the LMS.

4. Click the Choose File button.5. Locate the file for attachment.6. Once the file is attached, click Upload File.

ASSESSMENT QUESTIONS

Using Figure 7.2 from Fundamental of Database Systems, identify the following concepts in the ER schema diagram by name of entity and attribute, e.g., DEPARTMENT.Name. Worth 7 points each.

1. The attributes for PROJECT:

2. A composite attribute:

3. A multi-valued attribute:

4. The key attributes for PROJECT:

5. The relationship types:

6. A derived attribute:

7. A weak entity:

8. Identifying relationship of a weak entity:

9. A partial key of a weak entity type:

10. EMPLOYEE has a total participation in what relationship types:

11. EMPLOYEE has a partial relationship in what relationship types:

12. A recursive relationship:

Essay Answer. Worth 16 points.

13. There are two main reasons for including class/subclass relationships and specializations in a data model. Briefly describe each of the two.