Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode. Share Email. Top clipped slide. Download Now Download Download to read offline. Ajit Nayak Follow. Software Engineering an Introduction. Types of UML diagrams. Lecture Use Case Diagrams. Introduction to UML. Uml - An Overview. Related Books Free with a 30 day trial from Scribd.
Related Audiobooks Free with a 30 day trial from Scribd. The state model describes the states and events in a system using a diagram or table. There are many different types of state diagrams and tables. Causal Loop Diagrams are used for System Models.
In an object-oriented approach a state model is typically used to describe the lifecycle of a complex object. What are elements of a state in a state diagram? What are the elements in State Chart diagrams? What is state table and state diagram?
The relationship that exists among the inputs, outputs, present states and next states can be specified by either the state table or the state diagram. State Table. The state table representation of a sequential circuit consists of three sections labeled present state, next state and output. What is a state graph? What is the difference between state diagram and activity diagram? State chart modeling is used to show the sequence of states that an object goes through, the cause the transition from one state to other and the action that result from a state change.
Activity diagram is flow of functions without trigger event mechanism, state machine is consist of triggered states. What are the types of interaction diagrams? We have two types of interaction diagrams in UML. The sequence diagram captures the time sequence of the message flow from one object to another and the collaboration diagram describes the organization of objects in a system taking part in the message flow.
What is activity diagram definition? An activity diagram visually presents a series of actions or flow of control in a system similar to a flowchart or a data flow diagram. These diagrams are used to represent various states of a system and entities within the system. Following are the various notations that are used throughout the state chart diagram.
All these notations, when combined, make up a single diagram. The initial state symbol is used to indicate the beginning of a state machine diagram. It contains a condition. Depending upon the result of an evaluated guard condition, a new path is taken for program execution. A transition is a change in one state into another state which is occurred because of some event. A transition causes a change in the state of an object.
It is a specific moment in the lifespan of an object. It is defined using some condition or a statement within the classifier body. It is used to represent any static as well as dynamic situations. It is denoted using a rectangle with round corners. The name of a state is written inside the rounded rectangle. The name of a state can also be placed outside the rectangle.
This can be done in case of composite or submachine states. One can either place the name of a state within the rectangle or outside the rectangle in a tabular box. One cannot perform both at the same time. A state can be either active or inactive. When a state is in the working mode, it is active, as soon as it stops executing and transits into another state, the previous state becomes inactive, and the current state becomes active.
Statechart diagrams are used to describe the various state that an object passes through. A transition between one state into another state occurs because of some triggered event.
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