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Object Oriented Data Modeling MCQ Questions and Answers

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In this section we provide lots of objective question of Object-Oriented Data Modeling in Database Management System.

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1) The fact that the same operation may apply to two or more classes is called what?

    Inheritance
    Polymorphism
    Encapsulation
    Multiple classification

Answer : B Discuss

2) The object-oriented development life cycle is which of the following?

    Analysis, design, and implementation steps in the given order and using multiple iterations.
    Analysis, design, and implementation steps in the given order and going through the steps no more than one time.
    Analysis, design, and implementation steps in any order and using multiple iterations.
    Analysis, design, and implementation steps in any order and going through the steps no more than one time.

Answer : A Discuss

3) Multiplicity is the same as what concept for an ERD?

    Relationship
    Attribute
    Entity
    Cardinality

Answer : D Discuss

4) Composition is a stronger form of which of the following?

    Aggregation
    Encapsulation
    Inheritance
    All of the above.

Answer : A Discuss

5) An abstract class is which of the following?

    A class that has direct instances, but whose descendants may have direct instances.
    A class that has no direct instances, but whose descendants may have direct instances.
    A class that has direct instances, but whose descendants may not have direct instances.
    A class that has no direct instances, but whose descendants may not have direct instances

Answer : B Discuss

6) The term Complete for a UML has the same meaning as which of the following for an EER diagram?

    Overlapping rule
    Disjoint rule
    Total specialization rule
    Partial specialization rule

Answer : C Discuss

7) A UML diagram includes which of the following?

    Class name
    List of attributes
    List of operations
    All of the above.

Answer : D Discuss

8) An object can have which of the following multiplicities?

    Zero
    One
    More than one
    All of the above.

Answer : D Discuss

9) Which of the following statement is true concerning objects and/or classes?

    An object is an instance of a class.
    A class is an instance of an object.
    An object includes encapsulates only data.
    A class includes encapsulates only data.

Answer : A Discuss

10) Which of the following applies to a class rather than an object?

    Query
    Update
    Scope
    Constructor

Answer : C Discuss

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