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- Question
A constructor operation does which of the following?
Options- A. Creates a new instance of a class
- B. Updates an existing instance of a class
- C. Deletes and existing instance of a class
- D. All of the above.
- Correct Answer
- Creates a new instance of a class
- 1. Composition is a stronger form of which of the following?
Options- A. Aggregation
- B. Encapsulation
- C. Inheritance
- D. All of the above. Discuss
- 2. An abstract class is which of the following?
Options- A. A class that has direct instances, but whose descendants may have direct instances.
- B. A class that has no direct instances, but whose descendants may have direct instances.
- C. A class that has direct instances, but whose descendants may not have direct instances.
- D. A class that has no direct instances, but whose descendants may not have direct instances Discuss
- 3. An object can have which of the following multiplicities?
Options- A. Zero
- B. One
- C. More than one
- D. All of the above. Discuss
- 4. The benefits of object-oriented modeling are which of the following?
Options- A. The ability to tackle more challenging problems
- B. Reusability of analysis, design, and programming results
- C. Improved communication between users, analysts, etc.
- D. All of the above. Discuss
- 5. Which of the following statement is true concerning objects and/or classes?
Options- A. An object is an instance of a class.
- B. A class is an instance of an object.
- C. An object includes encapsulates only data.
- D. A class includes encapsulates only data. Discuss
- 6. In an enterprise-class database system, business users interact directly with database applications, which directly access the database data.
Options- A. True
- B. False Discuss
- 7. One of the reasons why OODBMSs have not been widely used for business information systems is that OOP is obsolete.
Options- A. True
- B. False Discuss
- 8. Enterprise Resource Planning (ERP) is an example of a single user database.
Options- A. True
- B. False Discuss
- 9. A database design may be based on existing data.
Options- A. True
- B. False Discuss
- 10. In a database, data is stored in spreadsheets which have rows and columns.
Options- A. True
- B. False Discuss
Object-Oriented Data Modeling problems
Search Results
Correct Answer: Aggregation
Correct Answer: A class that has no direct instances, but whose descendants may have direct instances.
Correct Answer: All of the above.
Correct Answer: All of the above.
Correct Answer: An object is an instance of a class.
Correct Answer: False
Correct Answer: False
Correct Answer: False
Correct Answer: True
Correct Answer: False
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