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System Analysis
Chapter 4, 5 and 6 review
| Question | Answer |
|---|---|
| Uses various symbols to show how the system transforms input data into useful information. | data flow diagram(DFD) |
| A set of DFDs provides a logical model that shows ___ the system does, not how | what |
| 4 basic symbols represent ____, ____, ____, and ___. | processes, data flows, data stores, and entities. |
| 2 common types of DFDs are: | Gane and Sarson. Yourdon. |
| Symbols are referenced by using all ____ letters for the symbol name. | capital |
| receives input data and produces output that has a different content, form, or both. | Processes |
| Processes contain the _____, also called the ___ that transform that data and produce the required results. | business logic, business rules. |
| A process is represented by a _______ | rectangle with rounded corners. |
| A process symbol can be referred to as a ____ because inputs, outputs, etc are known but underlying details and logic are hidden | black box |
| A path for data to move from one part of the information system to another. | data flow |
| with spontaneous generation there is no ___ | input |
| with a black hole there is ____ | input, no output |
| with a gray hole there is ___ | at least one input and one output but the input is not sufficient to generate the output. |
| a ___ represents data that the system stores because one or more processes need to use data at a later time. | data store |
| A data store is represnted by a _____ which is open on the right side and closed on the left. | flat rectangle |
| Data store names are plural and either a ___ or ___. | noun, adjective |
| In some instances, a data store has no ___ data | input |
| An entity is represented by a shaded ___ | rectangle |
| DFD entities are also called ____ because they are data origins or final destinations | terminators |
| Entities that supply data to the system a ___. | source |
| An entity that receives data from the system is a ____ | sink |
| Each entity must be connected to a process by a ___. | data flow |
| A ___ is a top-level view of an information system that shows the system's boundaries and scope. | context diagram |
| A ____ data flow is a data flow in which the same data travels to two or more different locations | diverging |
| A ___ ___ is a process that consists of a single function that is not explode further. | functional primitive |
| ___ is the process of drawing a series of increasingly detailed diagrams until all functional primitives are identified | leveling |
| ___ maintains consistency among a set of DFDs by ensuring that input and output data flows align properly. | balancing |
| Leveling is also called | exploding, partioning, decomposing |
| A data dictionary or data ____ is a central storehouse of information about the systems data. | repository |
| A data element or ___ or ___ is the smallest piece of data that has meaning within an information system. | item, field |
| Data elemnts are combined into records, also called _____ ___. A record is a meaningful combination of related data elements that is included in a data flow or retained in a data store. | data structures |
| An ___ is any name other than the standard data element name. | alias |
| ___ design is based on combinations of 3 logical structures sometimes called control structure which serve as building blocks for the process. | modular |
| A _____ documents the details of a functional primitive and represents a specific set of processing steps and business logic. | process description |
| 3 logical structure are ___ | sequence, selection, iteration |
| ___ is the completetion of 1 of 2 or more process steps based on the results of a test/condition | selection |
| ___ is the completetion of a process step that is repeated until a specific condition changes (looping) | iteration. |
| A ___ shows a logical structure, with all possible conbinations of conditions and resulting actions. | decision table. |
| A _____ is a graphical representation of the conditions, actions, and rules found in a decision table. | decision tree |
| In a ___ approach they develop a physical model of the current sustem, a logical model of the current system, and a logical model of the new system. | four-model |
| ____ anaylsis describes an information system by identifying things called objects. | object-oriented |
| The end product of object oriented analysis is | object model |
| ___ is a widely used method of visualizing and documenting an information system. | Unified Modeling Language (UML) |
| An object has certain ___, which are characteristics that describe the object. | attributes |
| An object also has ___, which was tasks or functions that the object performs when it receives a ___, or command to do so. | methods, message |
| A __ is a group of similiar objects. | class |
| An ___ is a specific member of a class. | instance |
| Objects can have a specific attribute called a ___. | state |
| A __ defines specific tasks that an object can perform. | method |
| The concept that a message gives different meanings to different objects is called ___. | polymorphism |
| The black box concept is an example of ____, which means that all data and methods are self-contained. | encapsulation |
| Objects within a class can be grouped into ____. | subgroups |
| A class can belong to a more general category called a ____. | superclass |
| ____ enable objects to communicate and interact as they perform business functions and transactions required | Relationships |
| ___ enables an object, called a ___ to derive one or more of its attributes | Inheritance, child |
| A ___ represents the steps in a specific business function or process. | use case |
| An external entity, called an ____, initiates a use case by requesting the system to perform a function or process. | actor |
| For each use case, you also develop a _____ in the form of a table. | use case description |
| A __ ___ is a visual summary of several related use cases within a system or subsystem. | use case diagram |
| The ___ shows what is included in the system and what is not included in the system. | system boundary |
| A ___ diagram represents a detailed view of a single use case, shows the classes that participate in the use case and documents the relationship among the classes. | class |
| __ describes how instances of one class relate to instances of another class. | cardinality |
| A ___ diagram is a dynamic model of a use case, showing the interaction among classes during a specified time period. | sequence |
| The ___ represents the time during which the object above it is able to interact with the other objects in the use case. | lifeline |
| The ___ indicates when an object send or receives a message | focus |
| A ___ diagram shows how an object changes from one state to another, depending on events that affect the object. | state transition |
| An ___ digram resembles a horizontal flowchart that shows the actions and events as they occur. | activity |
| A ___ diagram represents a detailed view of a single use case, shows the classes that participate in the use case and documents the relationship among the classes. | class |
| __ describes how instances of one class relate to instances of another class. | cardinality |
| A ___ diagram is a dynamic model of a use case, showing the interaction among classes during a specified time period. | sequence |
| The ___ represents the time during which the object above it is able to interact with the other objects in the use case. | lifeline |
| The ___ indicates when an object send or receives a message | focus |
| A ___ diagram shows how an object changes from one state to another, depending on events that affect the object. | state transition |
| An ___ digram resembles a horizontal flowchart that shows the actions and events as they occur. | activity |
Created by:
darkskye
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