MCQOPTIONS
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MCQOPTIONS
This section includes 26 Mcqs, each offering curated multiple-choice questions to sharpen your Database knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
An object's state is determined by its attribute values and links to other objects.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Each association has two or more roles.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
When a business rule involves three or more graphical symbols, you can show the constraint as a note and attach the note to each of the symbols by a dashed line.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The reasons for overriding include extension, restriction, and optimization.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
An operation that alters the state of an object is known as a constructor operation.%! |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
A solid diamond represents a stronger form of aggregation, known as composition.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
Multiple inheritance allows a class to inherit features from more than one superclass.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
In an object diagram, an object is represented as a rectangle with two compartments.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
In UML, a class is represented by a rectangle with three compartments separated by vertical lines.%! |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
The UML notation is useful for graphically depicting an object-oriented analysis or design model.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Composition does not allow an object to be part of more than one aggregate object.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
A class is a concept, abstraction, or thing that makes sense in an application context.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
An aggregation is a stronger form of association relationship and is represented with a solid diamond at the aggregate end.%! |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
A derived element is typically shown by placing either a slash (/) or a stereotype of <> before the name of the element.%! |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
A method defines the form or protocol of the operation, but not its implementation.%! |
| A. | True |
| B. | False |
| Answer» C. | |
| 16. |
An abstract class is which of the following?%! |
| 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 |
| Answer» C. A class that has direct instances, but whose descendants may not have direct instances. | |
| 17. |
*/*_Aggregation is which of the following?? |
| 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. |
| Answer» B. Expresses a part-of relationship and is a weaker form of an association relationship. | |
| 18. |
*/*_Which of the following applies to a class rather than an object?? |
| A. | Query |
| B. | Update |
| C. | Scope |
| D. | Constructor |
| Answer» D. Constructor | |
| 19. |
*/*_An abstract class is which of the following?? |
| 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 |
| Answer» C. A class that has direct instances, but whose descendants may not have direct instances. | |
| 20. |
_ Which of the following is a technique for hiding the internal implementation details of an object?$? |
| A. | Encapsulation |
| B. | Polymorphism |
| C. | Inheritance |
| D. | All of the above |
| Answer» B. Polymorphism | |
| 21. |
_ Which of the following statement is true concerning objects and/or classes?$? |
| 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. |
| Answer» B. A class is an instance of an object. | |
| 22. |
_ Composition is a stronger form of which of the following?$? |
| A. | Aggregation |
| B. | Encapsulation |
| C. | Inheritance |
| D. | All of the above |
| Answer» B. Encapsulation | |
| 23. |
A constructor operation does which of the following?$? |
| 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 |
| Answer» B. Updates an existing instance of a class | |
| 24. |
An object can have which of the following multiplicities?$? |
| A. | Zero |
| B. | One |
| C. | More than one |
| D. | All of the above |
| Answer» E. | |
| 25. |
Multiplicity is the same as what concept for an ERD?$? |
| A. | Relationship |
| B. | Attribute |
| C. | Entity |
| D. | Cardinality |
| Answer» E. | |
| 26. |
The term Incomplete for a UML has the same meaning as which of the following for an EER diagram?$? |
| A. | Overlapping rule |
| B. | Disjoint rule |
| C. | Total specialization rule |
| D. | Partial specialization rule |
| Answer» E. | |