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Author Question: On a use-case diagram, an extends relationship extends a use case by capturing additional actions or ... (Read 86 times)

cdr_15

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on: Jul 7, 2018
On a use-case diagram, an extends relationship extends a use case by capturing additional actions or behaviors that need to be performed.
 
  Indicate whether the statement is true or false

Question 2

Sequential retrieval on the primary key is impractical with the hashed file organization.
 
  Indicate whether the statement is true or false


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mmj22343

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Reply #1 on: Jul 7, 2018
Answer to Question 1

TRUE
Explanation: Microsoft Visio shows this as a line with a hollow triangle pointing toward the extended use case and labeled with the <> symbol, extends a use case by adding new behaviors or actions.
CL

Answer to Question 2

TRUE
Explanation: Although there are several variations of hashed files, in most cases the rows are located nonsequentially as dictated by the hashing algorithm. This makes sequential retrieval impractical.
CL


cdr_15

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Reply 2 on: Jul 7, 2018
YES! Correct, THANKS for helping me on my review

flexer1n1

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Reply 3 on: Yesterday
Wow, this really help

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