System Sequence Diagrams in UML

<p>At least one system sequence diagram per use case (D)</p> Signup and view all the answers

<p>System Sequence Diagram (A)</p> Signup and view all the answers

<p>Interaction between objects (A)</p> Signup and view all the answers

<p>Sequence diagrams and activity diagrams (D)</p> Signup and view all the answers

<p>To describe the required behavior of the system (B)</p> Signup and view all the answers

<p>They describe the static structure including objects and attributes. (D)</p> Signup and view all the answers

<p>Use cases and class modeling (B)</p> Signup and view all the answers

<p>The operations of a single class (A)</p> Signup and view all the answers

<p>Objects send messages to implement the required functionalities. (C)</p> Signup and view all the answers

<p>Techniques for implementing use cases (D)</p> Signup and view all the answers

<p>Message-sending capabilities (B)</p> Signup and view all the answers

<p>Using the notation {new} (C)</p> Signup and view all the answers

<p>Sequence diagrams represent time sequencing through vertical positioning (B)</p> Signup and view all the answers

<p>They show the active period of an object during a message exchange (C)</p> Signup and view all the answers

<p>By the notation {destroyed} (A)</p> Signup and view all the answers

<p>The sequence in which messages are sent (D)</p> Signup and view all the answers

<p>They signify recursive method calls (D)</p> Signup and view all the answers

<p>To model complex decision-making processes (B)</p> Signup and view all the answers

<p>Insert coins(), Enter Choice(), Dispatch Item (B)</p> Signup and view all the answers

<p>One Central Class (D)</p> Signup and view all the answers

<p>Overloading the central class with use cases (B)</p> Signup and view all the answers

<p>To match real-world actor actions (C)</p> Signup and view all the answers

<p>Overloading of the central class (D)</p> Signup and view all the answers

<p>Needs to recognize only the central object (A)</p> Signup and view all the answers

<p>Initiating use-cases and operations (A)</p> Signup and view all the answers

<p>A general system object (D)</p> Signup and view all the answers

<p>Sequence diagrams emphasize the time sequence of interactions. (A)</p> Signup and view all the answers

<p>The overall pattern of message flow is difficult to see. (C)</p> Signup and view all the answers

<p>Look at interactions implied by use cases. (D)</p> Signup and view all the answers

<p>Communication diagrams highlight interactions more clearly. (D)</p> Signup and view all the answers

<p>Determining where the first message originates. (B)</p> Signup and view all the answers

<p>They indicate how the system must change after operations. (A)</p> Signup and view all the answers

<p>They represent interactions in a two-dimensional format. (B)</p> Signup and view all the answers

<p>It depicts the interactions between objects dynamically. (C)</p> Signup and view all the answers

<p>They provide traceability from each use case to a class. (C)</p> Signup and view all the answers

<p>It can lead to a large number of similar classes. (A)</p> Signup and view all the answers

<p>Through the use of forks or cascades. (D)</p> Signup and view all the answers

<p>It reduces its usefulness in different applications. (C)</p> Signup and view all the answers

<p>It creates ambiguity in the message sending process. (C)</p> Signup and view all the answers

<p>It can lead to increased development time and complexity. (C)</p> Signup and view all the answers

<p>There is greater difficulty connecting interactions to specific classes. (D)</p> Signup and view all the answers

<p>It centralizes control in the sender of the message. (A)</p> Signup and view all the answers

UML diagrams that visualize the interaction between objects in a system.

UML diagrams that show the sequential order of messages exchanged between objects over time.

UML diagrams that focus on the relationships and dependencies between objects, without a strict time order.

A diagram that shows the interaction between a user (actor) and the system, focusing on the system's response to user actions.

UML diagrams that depict the dynamic behavior of an individual object over time.

UML diagrams that capture the workflow of a system, showing the sequence of activities and decisions involved.

Dynamic modeling in UML is used to visualize how objects interact and work together to implement the functionality described in use cases.

The process of defining and refining the attributes and operations of classes based on the interactions and messages they exchange.

A visual summary of a use case, showing interactions between external actors and the system, including messages sent and received.

A visual representation of the system's response to user actions, focusing on the messages sent and received across the system boundary.

The primary scenario in a use case where the system successfully completes its task.

Diagrams that show how objects interact with each other by sending and receiving messages, focusing on the relationships between objects.

Identifying the class that should handle the initial message in a use case.

Understanding how messages should flow between different objects in a use case.

Utilizing use case post-conditions to ensure the system changes as expected after an interaction.

Creating object diagrams representing the states before and after an operation to better understand the impact of interactions.

Considering different paths through a use case, including main and alternative scenarios, to understand the full range of interactions.

A special constraint used in communication diagrams to represent the creation of an object.

A special constraint used in communication diagrams to represent the destruction of an object.

The sequential numbering used in communication diagrams to clarify the order of messages between objects. It replaces the vertical positioning of elements in a sequence diagram.

A message sent to the current object or 'this' object within the same class. It represents internal actions within an object.

The conversion process of transforming a sequence diagram into a collaboration diagram. It essentially involves changing the focus from sequence to relationships.

A strategy in object-oriented modeling where a new class is created for each use case. This class typically has a 'run' method that encapsulates the use-case logic.

Using use case objects instead of actor classes to represent interactions in object-oriented design. This approach aims to improve reusability and traceability.

A design strategy in which messages from the user interface are sent to a single central object, typically a general object like 'System' or 'Hotel'. This central object then forwards the messages to the appropriate objects within the system.

Implementing a system by directly associating objects based on direct relationships between them. When an object needs to interact with another that it's not directly associated with, it's achieved through this approach.

A design strategy where the user interface sends messages directly to the software object that corresponds to the real-world actor who initiated the action. For example, a 'Customer' actor would send messages to a 'Customer' object in the system.

A design strategy where a separate class is created for each use case, responsible for handling the messages related to that specific use case.

A mechanism in interaction diagrams where an object sends a message to an object with which it doesn't have a direct association. This involves creating "forks" or "cascades" to handle communication between objects.

A method within interaction diagrams where communication is centralized in the sender object, allowing for direct messaging to other objects even if they don't have a direct relationship.

The interface's knowledge of the system's inner workings is limited to the central object, minimizing the reliance on specific business domain rules and concepts.

A method within interaction diagrams where responsibility for communication is delegated to another object. This object acts as a intermediary, forwarding messages to other objects indirectly related to the sender.

Each use case is linked to a method within the central class, making it easier to trace the code back to its original use case description.

The central class may become overloaded with too many responsibilities, potentially making the code complex and harder to manage.

Dividing the software system into smaller, modular packages, potentially with their own central classes, can help to address the problem of a single class becoming overly burdened.

This strategy can lead to a clearer and more structured design, as each use case is handled by a dedicated class. But, it can also increase complexity in terms of object interactions.