1. Question 1 Which of the following requires object database technology? A. Storing employee picture on disk B. Retrieving an employee picture C. Retrieving and processing an employee picture together with simpler data A and B could be accomplished with a hard drive and GIMP.

2. Question 2 Which of the following supports object oriented concepts? A. SQL1 B. SQL2 C. SQL3 D. All of the above C. SQL 3 (We saw how SQL 2 is insufficient in Monday's exercise. Note: SQL 3 is often referred to as SQL:2008.)

3. Question 3 Object in pure object oriented languages hide the implementation details, e.g. attributes and internal procedures, from external world. This properties is called: A. Abstraction B. Encapsulation C. Inheritance D. Polymorphism B. Encapsulation “As a second benefit, encapsulation provides a form of data independence. Because internal details of objects are hidden, changes to the internal details can be made without changing the code that uses the objects.” (Mannino pg. 719)

4. Question 4 Which of the object concepts are usually not implemented in today’s object relational DBMS because of the serious performance concerns? A. Data abstraction B. Encapsulation C. Inheritance D. Methods (i.e. procedures) B. Encapsulation Abstraction is inherent in databases (physical layer vs. logical layer). Inheritance options are used in databases such as PostgreSQL. Examples of methods have been shown previously in class.

5. Question 5 Which of the following do not apply to today’s object relational DBMS? A. Calls to functions that process media data are part of the database language B. Specialized storage structures are provided C. Reliability is of no concern D. Combined access to complex data and relational data is optimized C. Reliability is of no concern