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- Question
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.
- Correct Answer
- An object is an instance of a class.
- 1. 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
- 2. Which of the following applies to a class rather than an object?
Options- A. Query
- B. Update
- C. Scope
- D. Constructor Discuss
- 3. Aggregation is which of the following?
Options- A. Expresses a part-of relationship and is a stronger form of an association relationship.
- B. Expresses a part-of relationship and is a weaker form of an association relationship.
- C. Expresses an is-a relationship and is a stronger form of an association relationship.
- D. Expresses an is-a relationship and is a weaker form of an association relationship. Discuss
- 4. Which of the following is a technique for hiding the internal implementation details of an object?
Options- A. Encapsulation
- B. Polymorphism
- C. Inheritance
- D. All of the above. Discuss
- 5. The fact that the same operation may apply to two or more classes is called what?
Options- A. Inheritance
- B. Polymorphism
- C. Encapsulation
- D. Multiple classification Discuss
- 6. 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
- 7. An object can have which of the following multiplicities?
Options- A. Zero
- B. One
- C. More than one
- D. All of the above. Discuss
- 8. 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
- 9. Composition is a stronger form of which of the following?
Options- A. Aggregation
- B. Encapsulation
- C. Inheritance
- D. All of the above. Discuss
- 10. 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
Object-Oriented Data Modeling problems
Search Results
Correct Answer: All of the above.
Correct Answer: Scope
Correct Answer: Expresses a part-of relationship and is a stronger form of an association relationship.
Correct Answer: Encapsulation
Correct Answer: Polymorphism
Correct Answer: All of the above.
Correct Answer: All of the above.
Correct Answer: A class that has no direct instances, but whose descendants may have direct instances.
Correct Answer: Aggregation
Correct Answer: Creates a new instance of a class
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