Object Oriented Data Modeling MCQ

Test your knowledge with important Object Oriented Data Modeling MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Object Oriented Data Modeling MCQs at Bissoy

• An object's state is determined by its attribute values and links to other objects.
  ক

  True

  খ

  False
• The reasons for overriding include extension, restriction, and optimization.
  ক

  True

  খ

  False
• Multiple inheritance allows a class to inherit features from more than one superclass.
  ক

  True

  খ

  False
• The UML notation is useful for graphically depicting an object-oriented analysis or design model.
  ক

  True

  খ

  False
• An aggregation is a stronger form of association relationship and is represented with a solid diamond at the aggregate end.
  ক

  True

  খ

  False
• Each association has two or more roles.
  ক

  True

  খ

  False
• An operation that alters the state of an object is known as a constructor operation.
  ক

  True

  খ

  False
• In an object diagram, an object is represented as a rectangle with two compartments.
  ক

  True

  খ

  False
• Composition does not allow an object to be part of more than one aggregate object.
  ক

  True

  খ

  False
• A derived element is typically shown by placing either a slash (/) or a stereotype of before the name of the element.
  ক

  True

  খ

  False
• 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.
  ক

  True

  খ

  False
• A solid diamond represents a stronger form of aggregation, known as composition.
  ক

  True

  খ

  False
• In UML, a class is represented by a rectangle with three compartments separated by vertical lines.
  ক

  True

  খ

  False
• A class is a concept, abstraction, or thing that makes sense in an application context.
  ক

  True

  খ

  False
• A method defines the form or protocol of the operation, but not its implementation.
  ক

  True

  খ

  False
• Aggregation is which of the following?
  ক

  Expresses a part-of relationship and is a stronger form of an association relationship.

  খ

  Expresses a part-of relationship and is a weaker form of an association relationship.

  গ

  Expresses an is-a relationship and is a stronger form of an association relationship.

  ঘ

  Expresses an is-a relationship and is a weaker form of an association relationship.
• Which of the following is a technique for hiding the internal implementation details of an object?
  ক

  Encapsulation

  খ

  Polymorphism

  গ

  Inheritance

  ঘ

  All of the above
• A constructor operation does which of the following?
  ক

  Creates a new instance of a class

  খ

  Updates an existing instance of a class

  গ

  Deletes and existing instance of a class

  ঘ

  All of the above
• The term Incomplete for a UML has the same meaning as which of the following for an EER diagram?
  ক

  Overlapping rule

  খ

  Disjoint rule

  গ

  Total specialization rule

  ঘ

  Partial specialization rule
• Which of the following applies to a class rather than an object?
  ক

  Query

  খ

  Update

  গ

  Scope

  ঘ

  Constructor
• Which of the following statement is true concerning objects and/or classes?
  ক

  An object is an instance of a class.

  খ

  A class is an instance of an object.

  গ

  An object includes encapsulates only data.

  ঘ

  A class includes encapsulates only data.
• An object can have which of the following multiplicities?
  ক

  Zero

  খ

  One

  গ

  More than one

  ঘ

  All of the above
• A UML diagram includes which of the following?
  ক

  Class name

  খ

  List of attributes

  গ

  List of operations

  ঘ

  All of the above
• The term Complete for a UML has the same meaning as which of the following for an EER diagram?
  ক

  Overlapping rule

  খ

  Disjoint rule

  গ

  Total specialization rule

  ঘ

  Partial specialization rule
• An abstract class is which of the following?
  ক

  A class that has direct instances, but whose descendants may have direct instances.

  খ

  A class that has no direct instances, but whose descendants may have direct instances.

  গ

  A class that has direct instances, but whose descendants may not have direct instances.

  ঘ

  A class that has no direct instances, but whose descendants may not have direct instances
• Composition is a stronger form of which of the following?
  ক

  Aggregation

  খ

  Encapsulation

  গ

  Inheritance

  ঘ

  All of the above
• Multiplicity is the same as what concept for an ERD?
  ক

  Relationship

  খ

  Attribute

  গ

  Entity

  ঘ

  Cardinality
• The object-oriented development life cycle is which of the following?
  ক

  Analysis, design, and implementation steps in the given order and using multiple iterations.

  খ

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

  গ

  Analysis, design, and implementation steps in any order and using multiple iterations.

  ঘ

  Analysis, design, and implementation steps in any order and going through the steps no more than one time.
• The fact that the same operation may apply to two or more classes is called what?
  ক

  Inheritance

  খ

  Polymorphism

  গ

  Encapsulation

  ঘ

  Multiple classification