MIS Chapter 5
37. A process model is an informal way of showing the external entities, event triggers, inputs and outputs.
False
66. Project teams usually use process modeling tools or CASE tools to draw process models.
True
69. While there is no one right way to begin, the authors have found it useful to first build the context diagram showing all the external entities to the system.
True
36. The normal order of processes would be: requirements gathering, use case development, process modeling (data flow diagrams).
True
39. Process models can be used with either 'as-is' systems or 'to-be' systems.
True
40. Data Flow diagramming is a tool for doing process modeling.
True
45. A repository for data in DFDs is called a 'data store'
True
7. A data flow is: a) An activity or a function that is performed for some specific business reason b) A single piece of data c) A collection of entities d) A trigger to a use case e) A person, organization or system outside of the system
b) A single piece of data
16. A payroll data flow diagram has a data-store called Accumulated Salary Data. At one stage in the DFD, a process "Calculate YTD-Taxes" gets data from that data store, updates it in the process, and writes it back out. The diagram should show: a) A single line with arrows on both ends labeled YTD Payroll Details b) A dashed line with arrows on both ends labeled YTD Payroll Details c) A line out of the data store labeled: Current YTD Payroll Details; and a line into the data store labeled: Updated YTD Payroll Details d) Two separate data flow lines but each with the same name YTD Payroll Details e) Two dashed lines but each with the same name of YTD Payroll Details
c) A line out of the data store labeled: Current YTD Payroll Details; and a line into the data store labeled: Updated YTD Payroll Details
55. Many business processes are too complex to be explained in one DFD.
True
56. One important principal in process modeling with DFD's is the decomposition on the business processes into a series of DFD's.
True
57. Context diagrams show the entire system in context with the environment (like external entities)
True
59. The purpose of the Level 0 DFD is to show all the major high-level processes of the system and how they are interrelated.
True
60. In general, all process models will have as many level 1 diagrams as there are processes on the level 0 diagram.
True
61. Children processes collectively make up the parent process (but give more detail).
True
6. The relation between use cases and data flow diagrams is generally: a) Use cases are developed by users and data flow diagrams are developed by systems analysts b) Data flow diagrams are developed first and then use cases ensue c) Use cases are developed first and then data flow diagrams ensue d) Use cases show logical processes, while data flow diagrams show physical processes e) There is not a relationship between use cases and data flow diagrams
c) Use cases are developed first and then data flow diagrams ensue
15. On your level 0 diagram you have a process #2 and when you create a level 1 diagram for process #2, you might have processes like: a) 2.1, 2.2, 2.3 b) 2-1, 2-2, 2-3 c) 2A, 2B, 2C d) 2-A, 2-B, 2-C e) 2-initial, 2-main, 2-end
a) 2.1, 2.2, 2.3
19. Vanessa has a data flow diagram with an item called 'Register for Class'. That item would be: a) A process b) A data flow c) A data store d) An external entity e) A process relationship
a) A process
24. A process is: a) An activity of a function that is performed for some specific business reason b) A single piece of data within a system c) A collection of data within a system d) A person, organization or system that is external to the system e) A combination of function and the data it acts upon
a) An activity of a function that is performed for some specific business reason
13. Which Data Flow Diagram shows the entire system with its environment with only one process? a) Context Diagram b) Level 0 diagrams c) Level 1 diagrams d) Level 2 diagrams e) All DFDs show this
a) Context Diagram
14. Which Data Flow Diagram does not have data stores? a) Context diagram b) Level 0 diagram c) Level 1 diagrams d) Level 2 diagrams e) Process Diagram
a) Context Diagram
20. Andrei has a diagram that shows only one process and external entities. He is developing a: a) Context diagram b) Use case diagram c) Level 0 diagram d) Level 1 diagram e) Level 2 diagram
a) Context diagram
12. Ruth is an analyst. On her DFD diagram she has just placed a process. She will a) Give it a verb phrase name, like 'search inventory' b) Give it a noun description phrase, like 'Inventory-process-1' c) Give it only a number - and depending on whether it is a major process (a whole number) or a subsidiary process (a whole number with a decimal point and value - like 1.3) d) Give it a sentence name, like 'Customer arrives at checkout counter' e) Use whatever process she feels comfortable with - as long as she is consistent
a) Give it a verb phrase name, like "search inventory"
30. Chunxia is balancing her DFD. This means she is: a) Making sure that all information presented at one level is accurately represented in the next level b) Making sure that each data store has at least one input data flow and at least one output data flow c) Making sure that each process has at least one input data flow and at least one output data flow d) Making sure that all processes start with action verb phrases e) Making sure that all data flows have noun names
a) Making sure that all information presented at one level is accurately represented in the next level
4. Logical process models are: a) Models that describe processes without suggesting how they are conducted b) Coded logic models c) Models based upon implementing the if-then-else programming structure d) Developed by the infrastructure analyst e) Created in the system walkthough
a) Models that describe processes without suggesting how they are conducted
38. Process models are only used to document the current system (that is, the "as-is" system), since that is the system the users know and is the system that will be modified.
False
41. Data flow diagrams (as the name implies) focus on the physical data in a system.
False
42. According to the authors "Process modeling - and the creating of PMPs in particular - is one of the most important skills needed by systems analysts".
False
43. Processes in DFDs are shown as circles in the Gane and Sarson notation.
False
44. Data that is moving from a process to another process is called a 'data stream'.
False
46. Data (like Year-to-date totals) that come from a data store and are used in a process (like 'Calculate YTD Totals') and then the updated amounts are written back to the data store - can be drawn on a DFD model as a two-headed arrow.
False
48. The data stores on the DFD correspond to Major Steps Performed on a use case.
False
52. Data flows are named with verb phrases (like 'Move Payroll Information to Payroll Database').
False
58. The level 0 diagram shows all the major processes (at the first level of numbering - like 1 through 4), the data stores, data flows, but does not show external entities.
False
62. It is possible to decompose level 1 processes even farther, so for example, process 2.1 on a Level 1 DFD might become 2.1A, 2.1B, 2.1C, etc.
False
64. A 'black hole' error on a DFD is when a process creates output without an input.
False
65. Data cannot go from one process to another process without going to a data store first
False
67. Structured English uses complete sentences to describe the work that a process performs in a system.
False
68. Data cannot go from one process to another process without going to a data store first
False
70. Iterations are not used in good DFD design.
False
47. A well-constructed use case makes developing a data flow diagram fairly straightforward.
True
49. Every process on a DFD must have at least one input data flow.
True
50. Every process has a unique identification number, a name and a description.
True
51. Processes should be named with a verb and ending with a noun (like Calculate Sales Tax).
True
53. Data stores are named with nouns and have an identification number and description.
True
54. External entities are a person, organization, or system that is external to the system, but interacts with it.
True
63. The second law of conservation of data states: "Processes cannot consume or create data".
True
33. Tom is trying to change his Use Case into a Data Flow Diagram. He has found that a use case step generally is the same as a ________ on the Level 1 Data flow diagram. a) Process b) External Entity c) Data flow d) Internal Entity e) Data store
a) Process
5. Processes in data flow diagramming are represented by: a) Rounded boxes b) Arrows c) Rectangles that is open on the right end d) Enclosed rectangles e) Circles
a) Rounded boxes
35. Ramesh has drawn a set of DFD's that are not properly balanced. This is probably a: a) Syntax error b) Semantic error c) Modeling error d) First law of conservation of data error e) Second law of conservation of data error
a) Syntax error
0. The relationship between use cases and data flow diagrams is: a) Use cases tend to be developed with users to make sure the analyst has fully captured the processes and relationships; DFD's are built upon the use cases to more fully formally understand the processes involved b) Both are tools in a systems analysts toolbox, although they do unrelated things c) Use cases are developed by users exclusively; while DFD's are developed by analysts exclusively d) Use cases come out of JAD sessions and clarify what was discussed by users in those sessions; DFD's come out of analysts interviews. e) They are the same thing - use cases are process models using the DeMarco and Yourdon notation; and DFD's are process models using the Gane and Sarson notation.
a) Use cases tend to be developed with users to make sure the analyst has fully captured the processes and relationships; DFD's are built upon the use cases to more fully formally understand the processes involved
34. Which of the following would be a 'black hole' error on a DFD? a) A process has no input b) A process has no output c) A process has four inputs and only three outputs d) Data moves directly from a data store from an external entity e) Two processes send data flows to the same data store
b) A process has no output
25. A data flow is: a) An activity of a function that is performed for some specific business reason b) A single piece of data within a system c) A collection of data within a system d) A person, organization or system that is external to the system e) A combination of function and the data it acts upon
b) A single piece of data within a system
29. Decomposing a DFD means: a) Balancing the processes so that each process has three and only three sub-processes b) Breaking complex processes into a structured set of detailed diagrams c) Doing a walk through on the entire DFD structure with all the analysts on the project team d) Taking lower levels of process refinement and aggregating them into a major system e) Making sure that all data stores are shown on each child DFD diagram
b) Breaking complex processes into a structured set of detailed diagrams
11. Andrea is creating a diagram model for processes (without regard to whether it is computerized or a manual process). She is probably creating _______________. a) A physical process model b) A PMT (process management tool) model c) A logical process model d) A user process model e) A UML system case model
c) A logical process model
2. A process model can __________: a) Only document the as-is system b) Only document the to-be system c) Document both the as-is and the to-be system d) Only be used in BPR situations e) Only be used with JAD sessions
c) Document both the as-is and the to-be system
28. Which of the following is NOT correct? a) Every set of DFD's must have one context diagram b) Every process is wholly and completely described by the processes on its children DFD's c) Every process must be broken down farther on Level 1 and Level 2 diagrams d) Every data store has at least one input data flow someplace in the entire DFD system e) Every process has a unique name that is an action oriented verb phrase
c) Every process must be broken down farther on Level 1 and Level 2 diagrams
32. Which would be the normal order of tasks? a) Requirements gathering, creating DFDs, creating use cases b) Creating use cases; creating DFD, holding JAD sessions c) Interviewing and/or JAD sessions; creating use cases; creating data flow diagrams d) Doing BPR, analyzing documents, creating DFDs, creating use cases e) Doing activity elimination, doing use cases, doing DFDs
c) Interviewing and/or JAD sessions; creating use cases; creating data flow diagrams
21. What diagram will have processes with one decimal place (like 3.1, 3.2, and 3.3) and might have flows coming in (or going out) that are not illustrated? a) Context diagram b) Level 0 diagram c) Level 1 diagram d) UML state diagram e) Level 0 diagram
c) Level 1 Diagram
26. Carlos has a Level 0 DFD diagram where one of the external entities is the "Internal Revenue Service" - and he has a data store called "Tax Rate Table". He has drawn a data flow arrow from the Internal Revenue Service to the data store as the data has been loaded into the Tax Rate Table prior to the processing. What would be true? a) This is correct b) This is incorrect, 'data at rest stays at rest until moved by a process' so he needs a process (like 'load Tax Rate Table') first in this system c) This is incorrect - he doesn't need a data flow as the data was loaded into the Tax Rate Table someplace else (within the payroll system someplace, but not in this process) d) This is almost correct. The correct diagram would be a dashed line indicating that the loading of the data was implied prior to the start of this process e) This is incorrect. What should happen is an 'external process' should be called at the start of the process - like "Call IRS for data load"
c) This is incorrect-he doesn't need a data flow as the data was loaded into the Tax Rate Table someplace else (within the payroll system someplace, but not in this process)
31. Data flow diagrams are: a) Usually created by users and reviewed by analysts b) Usually jointly created by analysts and users c) Usually created by the project team and reviewed by users for correctness d) Usually created by the project champion and reviewed by the project team e) Usually created by business analyst and reviewed by the infrastructure analyst
c) Usually created by the project team and reviewed by users for correctness
27. Amy has created a context diagram. What one DFD component is probably not shown? a) Process b) Data flow c) UML Stage d) Data store e) External Entity
d) Data store
17. James is developing a DFD. What would be a good name for him to use on a data flow from the Calculate Federal Withholding process to a data store called YTD Payroll Data? a) Move withholding to YTD storage b) Transfer fed taxes to YTD storage c) Calculation Result d) Federal Withholding Taxes e) Add amounts to YTD total
d) Federal Withholding Taxes
3. Data flow diagramming is: a) The only process modeling currently used b) A detailed description of data c) Almost the same as a flow chart d) Focused on the processes or activities that are performed e) A visual version of a use case
d) Focused on the processes or activities that are performed
23. The context diagram shows: a) Detailed processing logic b) All major processes c) All the data stores in the system d) The "big picture" of the system with external entities and only one process e) The system in context with all other systems in that department (for example, accounts payable, accounts receivable, etc.)
d) The "big picture" of the system with external entities and only one process
9. Brianna has a process has two inputs but only one output. a) This is an error as there needs to be the same amount of inputs as outputs b) This is an error as process do not have inputs or outputs c) This is normal as all processes have two inputs and one output d) This is normal as all processes need at least one input and at least one output e) This is an error as processes only produce output
d) This is normal as all processes need at least one input and at least one output
1. A process model is: a) The output of the interviewing process b) The work plan c) The model that is produced by extreme prototyping d) The expanded and thoroughly balanced use case for a system e) A formal way of representing how a business system operates
e) A formal way of representing how a business system operates
8. An external entity is: a) An activity or a function that is performed for some specific business reason b) A single piece of data c) A collection of data d) A trigger to a use case e) A person, organization or system outside of the system
e) A person, organization or system outside of the system
22. What diagram will have sub-processes with numbers like 3.3.1, 3.3.2, 3.3.3 (etc.) and also have flows coming in (or going out) that are not illustrated? a) Context diagram b) Level 0 diagram c) Gantt diagram d) Level 1 diagram e) Level 2 diagram
e) Level 2 diagram
18. Mark has a data store called 'Items' and it includes all the items sold in a convenience store - sorted by UPC code with the retail price of the item. He has only one data flow called 'Item Details' that flows from the data store to the Process Checkout process. What will be true in this case? a) This is incorrect as every data store must have both inputs and outputs b) This is incorrect as every process must have both inputs and outputs c) This is incorrect as the data flow should have a verb phrase like 'Get Item Details' d) This is incorrect as there is no way to update the 'Items' data store e) This is correct
e) This is correct