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Question
Which of the following is a true statement regarding data flows?A) A data flow to a data store means retrieve or use.
B) A data flow from a data store means update.
C) A data flow may have double-ended arrows.
D) A data flow represents data at rest.
E) A join in a data flow means that exactly the same data come from any of two or more different processes, data stores, or sources/sinks to a common location.
Answer
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Related questions
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All of the following are types of user documentation EXCEPT:
A) release description.
B) reference guide.
C) acceptance sign-off.
D) entity-relationship diagrams.
E) user's guide.
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Changing over from the old information system to a new one by turning off the old system as the new one is turned on best describes:
A) phased installation.
B) single location installation.
C) parallel installation.
D) direct installation.
E) rotation installation.
Q:
The organizational process of changing over from the current information system to a new one best defines:
A) reorganization.
B) physical design.
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User testing of a completed information system using real data in the real user environment refers to:
A) acceptance testing.
B) alpha testing.
C) beta testing.
D) system testing.
E) live testing.
Q:
The process of bringing together all of the modules that comprise a program for testing purposes is referred to as:
A) unity testing.
B) integration testing.
C) system testing.
D) implementation.
E) stub testing.
Q:
Testing each module alone in an attempt to discover any errors that may exist in the module's code is referred to as:
A) unit testing.
B) system testing.
C) stub testing.
D) singular testing.
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A primary objective of using automated tools for systems development and maintenance is to change radically how code and documentation are modified and updated.
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Today's environment makes it possible to maintain and update external documentation as long as desired.
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During alpha testing, users test a completed information system using simulated data.
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System testing is the process of bringing together all of the modules that a program comprises for testing purposes.
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Walkthroughs are a very effective method for identifying errors in code.
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A) foreign key.
B) candidate key.
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Q:
The primary deliverable from logical database design is:
A) normalized relations.
B) design specifications.
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D) a list of alternatives design strategies.
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Q:
Key physical database design decisions typically do not include:
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Q:
Which of the following is NOT a key step in logical database design?
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C) Model how data flow through an information system, the relationships among the data flows, and how data come to be stored at specific locations.
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Sequential files are practical for random row retrievals.
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