Which of the following is NOT true about operation contract? Select one: a. It describes an operation in terms of preconditions and postconditions. b. Instance creation is a common state change. c.It should be used only when the semantics of a system operation is unclear. d.It specifies a contract between an actor and the system. e.It clarifies the state change of the system in response to a system operation.
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Which of the following is NOT true about operation contract?
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- Compare and contrast the objective and abstract variables, as well as briefly explain the operationalization differences.Below picture is shown based on object-oriented modeling 1. Describe in detail the System Name and Specifications and stages the following identification:a. Candidate States and their analysis?b. Candidate Events and their analysis (optional Guard and Seq. of Action)?c. Transitions between each State (required to have a Composite States of typeOrthogonal, choose from one of the States that can be detailed)? 2. Display a picture illustration for each stage of identification?Subject: Formal method in software engineering Scenario Note: using Z Notation. You are required to specify the behavior of an ATM for deposit and withdrawal behavior. The ATM contains 3 modules i.e., deposit, withdrawal, and invalid. The notation will specify a function named balance that would be changeable in case of deposit or withdrawal. The amount is a variable that will be updated when the amount is deposited or withdrawn from the account. Status is also a variable that will be true before updating the amount in both modules.
- Create a UML class diagram using arrows to show the relationships between classes for the following scenario. The class diagram is attached for reference. A parking deck system manages an entry/exit gate, which opens to let a vehicle (i.e., car) into or out of the deck and closes when the car has passed through. A driver must push a button to print a parking permit. When the driver takes the parking permit, the system raises the gate. The system lowers the gate after the vehicle has passed through. A permit id and time of entry is printed on the parking permit, and is also encoded on the permit’s bar code. When the vehicle leaves the parking deck, the driver inserts the parking permit into a bar code reader, which scans the bar code, and then transmits the bar code to the parking system. The parking system calculates a fee that is based on the number of hours that have elapsed since the vehicle entered the parking deck, and displays the fee to the operator and driver. The driver must…(b) KLM-GOMS stands for Keystroke-Level Model for Goals, Operators, Methods, and Selection rules. It allows designers to predict how long it will take a skilled user to execute a specific set of actions using a particular interface design. The standard set of operators are: • Keying (K): for typing a key or clicking a control - 0.2s Pointing (P): pointing with a mouse to a target on a display - 1.1s • Homing (H): home hands on keyboard or other input device - 0.4s Mentally Preparing (M): think before doing an action - 1.35s Responding (R): time a user must wait for a response Once you determine the operators, you need to apply the following rules for mental operations before calculating the time. Rule 0: Add Ms in front of all Ks and all Ps that point to commands. Rule 1: Change PMK to PK to remove fully anticipated Ms. Rule 2: Eliminate any Ms in the middle of strings that are part of a cognitive unit (a contiguous sequence of typed characters). Rule 3: Delete Ms before consecutive…Question 15 Which of the following best defines abstraction?
- Draw Use Case Diagram for the following scenario: Consider the online box office. The system provides the following functions:Actors include the clerk, supervisor, and kiosk. The kiosk is another system that accepts orders from a customer. The customer is not an actor in the box office application because the customer is not directly connected to the application. Use cases include buying tickets through the kiosk or the clerk, buying subscriptions (only through the clerk), and surveying total sales (at the request of the supervisor).Course: System Analysis And Design , ITMA 411 State refers to an object’s current status. A state transition diagram shows how an object changes from one state to another, depending on events that affect the object. All possible states must be documented in the state transition diagram.In a state transition diagram, the states appear as rounded rectangles with thestate names inside. The initial state represented as a small circle, and it is the point where the object first interacts with the system. Lines used to show direction and describe the action or event that causes a transition from one state to another. The final state represented as a circle with a hollow border.In this assignment you are requested to create State Transition Diagram for the student registration system. Kindly Use Lucid ChartDistinguish between objective and abstract variables in terms of their operationalization discrepancies.
- Select the correct statements about sequence diagrams. A. Replicated messages are shown using a "loop box." B. Sequence diagrams cannot show optional messages involved in an interactions. C. A cross on the life line on an object indicates that the object is deleted. D. Objects and actors involved in the interaction are shown in the vertical axis. E. Time moves forward down the vertical axis.Code in C# Consider the following situation. “The Head of Department of XYZ university allocates duties to members of teaching staff and others at the end of each academic year. One person (Teacher) is assigned to lecture each of the modules which are supposed to be available in the following year. Each teacher updates his/her course outline for the module assigned. The Course coordinator updates other parts of course outline and check the module entries produced by the teachers. The academic officer keeps the master list of all students and updates the mailing list of students taking different modules and send it to the course coordinator. Student provisionally registers for modules. The academic officer checks that every student registered for a reasonable set of modules.” a) Predict the potential classes under the scope of this project? Also explain the reason of assumption. b) Show the purpose and scope of the project as per your own understanding? c) Predict attributes and methods…Task description Describe an example scenario where it is applicable to use the composite design pattern. You should not use the assembly-part stock control scenario described in lectures. You can make use of other sources for scenario ideas, but you should reference them appropriately. Your answer should include the following: a) A description of the scenario and the relevant objects in it. b) A class diagram illustrating the use of the composite design pattern. c) A description, with code snippets, of an implemented solution to the scenario without using the composite design pattern. d) A description, with code snippets, of an implemented solution to the scenario using the composite design pattern, making reference to how the implementation in c) was adapted. e) Your answers to c) and d) should include a discussion of data structures used, any association, aggregation, or composition relationships, inheritance relationships, and the use of polymorphism