When Changing a Logical DFD into a Physical DFD,it Might

question 35

Multiple Choice

When changing a logical DFD into a physical DFD,it might be necessary to ________.

• A)Add system-related data stores,data flows and processes
• B)Normalize the logical DFD into 3NF
• C)Create the user-interface with smaller fonts
• D)Change the system architecture to three-tiered architecture
• E)Delete extraneous data stores and delete extraneous data flows

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Definitions:

Joint Probability

The likelihood of two events occurring simultaneously.

Independent

Not influenced or controlled by others; in statistics, refers to variables that are not related or do not affect each other.

Marginal Probability

The probability of an event occurring, disregarding all other variables or outcomes in a probability distribution.

E(XY)

The expected value of the product of two random variables X and Y, indicating their joint mean over all pairs of outcomes.