Object Oriented Data Modeling(1st)

A constructor operation does which of the following?

1 Mark(s)

Creates a new instance of a class
Updates an existing instance of a class
Deletes and existing instance of a class
All of the above

Aggregation is which of the following?

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

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

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False
True

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

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Inheritance
Polymorphism
Multiple classification
Encapsulation

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

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False
True

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

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True
False

Each association has two or more roles.

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False
True

Composition is a stronger form of which of the following?

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Inheritance
All of the above
Aggregation
Encapsulation

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

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True
False

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

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True
False

A UML diagram includes which of the following?

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

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

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Overlapping rule
Partial specialization rule
Total specialization rule
Disjoint rule

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

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Scope
Query
Update
Constructor

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

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Overlapping rule
Total specialization rule
Disjoint rule
Partial specialization rule

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

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False
True

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

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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.

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

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True
False

The reasons for overriding include extension, restriction, and optimization.

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True
False

Which of the following is a technique for hiding the internal implementation details of an object?

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Encapsulation
All of the above
Inheritance
Polymorphism

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

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

Multiplicity is the same as what concept for an ERD?

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Relationship
Attribute
Cardinality
Entity

An abstract class is which of the following?

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

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

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True
False

An object can have which of the following multiplicities?

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All of the above
Zero
More than one
One

The benefits of object-oriented modeling are which of the following?

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All of the above
Reusability of analysis, design, and programming results
Improved communication between users, analysts, etc.
The ability to tackle more challenging problems

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

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False
True

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.

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False
True

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

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True
False

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

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False
True

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

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True
False

Object Oriented Data Modeling(1st) : Question 1 of 30