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- Question
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
- Correct Answer
- A class that has no direct instances, but whose descendants may have direct instances.
- 1. An object can have which of the following multiplicities?
Options- A. Zero
- B. One
- C. More than one
- D. All of the above. Discuss
- 2. 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
- 3. 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
- 4. A UML diagram includes which of the following?
Options- A. Class name
- B. List of attributes
- C. List of operations
- D. All of the above. Discuss
- 5. Which of the following applies to a class rather than an object?
Options- A. Query
- B. Update
- C. Scope
- D. Constructor Discuss
- 6. Composition is a stronger form of which of the following?
Options- A. Aggregation
- B. Encapsulation
- C. Inheritance
- D. All of the above. Discuss
- 7. 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. Discuss
- 8. 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
- 9. One of the reasons why OODBMSs have not been widely used for business information systems is that OOP is obsolete.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
- 10. Enterprise Resource Planning (ERP) is an example of a single user database.
Options- A. True
- B. False Discuss
Object-Oriented Data Modeling problems
Search Results
Correct Answer: All of the above.
Correct Answer: All of the above.
Correct Answer: An object is an instance of a class.
Correct Answer: All of the above.
Correct Answer: Scope
Correct Answer: Aggregation
Correct Answer: Creates a new instance of a class
Correct Answer: False
Correct Answer: False
Correct Answer: False
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