chap 008 database design

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Chapter 8 Data Modeling and A nalysis Tr ue/False Questions 1. Data mod eling is a techni que for def ining bu sines s requi rements for a database. Answer: True Page: 270 LD: !as" 2. Data mod eling is a techni que for or gani# ing and docu menti ng a s"st em$s log ical and %h"sical models. Answer: &alse Page: 270 LD: 'edium (ationale: Data modeling is a technique for organi#ing and documenting a s"stem$s data. ). Data mod eling is somet imes cal led data base mod eling bec ause a data model is e*entuall" im%lemented as a database. Answer: True Page: 270 LD: !as" +. An enti t" is s omethi ng about which th e busin ess nee ds to st ore dat a. Answer: True Page: 271 LD: !as" ,. An entit " is a clas s of %erso ns- %la ces- ob ects- e* ents or conce%ts about which we need to ca%ture and store data. Answer: True Page: 271 LD: !as" /. An ident it" is a cl ass of %e rsons - %laces - obect s- e*ents- or conce %ts abou t which we need to ca%ture and store data. Answer: &alse Page: 271 LD: 'edium (ationale: An entit" is a class of %ersons- %laces- obects- e*ents or conce%ts abou t which we need to ca%ture and store data. 7. An enti t" ins tance is a single occurrence of an entit". Answer: True Page: 272 LD: !as" . An enti t" ei stence i s a si ngle occ urren ce of an en tit" . Answer: &alse Page: 272 LD: !as" (ationale: An entit" instance is a single occurrence of an entit" . Whitten/Bentley, Systems Analysis & Design Methods, Seventh Edition 137

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