Question 1

List the diagrams included in behavioral diagrams.

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Question 2

Cookies are the only way to store data on the client computer that will exist beyond the current session.

Accepted Answer

Cookies are stored on the client computer and can persist beyond the current session, unlike session storage or local storage which are cleared at the end of the session or when the browser is closed.

Question 3

Polymorphism is when the object-oriented program may have several versions of the same method with the same name in a superclass/subclass relationship.

Accepted Answer

Polymorphism allows for overriding methods in a subclass that have the same name as methods in the superclass, while still retaining the ability to call the superclass method if needed.

Question 4

An entity class represents real-world items.

Accepted Answer

An entity class is a representation of a real-world entity or item. It defines the properties (attributes) and behaviors (methods) of the entity within an object-oriented programming language.

Question 5

When messages are passed from one class to another,the receiving class must have a method corresponding to the message name.

Accepted Answer

This is known as the principle of message passing in object-oriented programming. The receiving class must have a method with the same name as the message in order to properly handle and respond to the message being sent.

Question 6

A public attribute is only available in the object.

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Question 7

A boundary or interface class provides a means for users to work with the system.

Accepted Answer

A boundary or interface class acts as the bridge between the user and the system, enabling users to interact with the system and access its functionality.

Question 8

Temporal events occur at a predetermined time.

Accepted Answer

Temporal events are events that occur at a specific time or on a specific date, so they are predetermined.

Question 9

What is polymorphism?

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Question 10

A boundary class acts as a coordinator when implementing classes.

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Question 11

Association classes are those that are used to break up a many-to-many association between classes.

Accepted Answer

Association classes help to create a new class that represents the relationship between two or more existing classes, allowing a many-to-many association between those classes to be broken up into two one-to-many associations.

Question 12

What is UML? What are the three major elements of UML?

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Question 13

Component diagrams show a bird's-eye view of the system architecture.

Accepted Answer

Component diagrams provide a high-level view of the system architecture, showing the components and their relationships, typically from a top-down perspective.

Question 14

Signals or synchronous messages occur when a program does not wait for a returning message.

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Question 15

A deferred event is one that is held until an object changes state to one that can accept the event.

Accepted Answer

A deferred event is one that is held until an object changes state to one that can accept the event. Therefore, the statement is true.

Question 16

An abstract class cannot be directly instantiated.

Accepted Answer

Abstract classes are meant to be extended by other classes and provide a base template for those classes, but they are not intended to be instantiated themselves.

Question 17

List the and describe four categories into which classes fall.

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Question 18

Aggregation provides a means of showing that the whole object is composed of the sum of its parts (other objects).

Accepted Answer

Aggregation is a type of association in which one object is composed of multiple other objects, showing that the whole object is a sum of its parts.

Question 19

Describe the difference between a class and an object.

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Question 20

Collection is the relationship that exists when the whole has a responsibility for the part.

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Quiz 10: Object-Oriented Systems Analysis and Design Using UML