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91.3913 Assignment 4 Answers April 5, 2002

91.3913 Assignment 4 Answers April 5, 2002. Total of 27 marks. 1. Cyclomatic complexity. 4 marks. Either of these two representations is correct (simple sequences can be collapsed to a single node). CC = #edges - #nodes +2 = 6 - 6 + 2 = 2

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91.3913 Assignment 4 Answers April 5, 2002

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  1. 91.3913 Assignment 4 Answers April 5, 2002 Total of 27 marks 1. Cyclomatic complexity 4 marks Either of these two representations is correct (simple sequences can be collapsed to a single node). CC = #edges - #nodes +2 = 6 - 6 + 2 = 2 CC = #edges - #nodes +2 = 4 - 4 + 2 = 2

  2. 91.3913 Assignment 4 Answers April 5, 2002 2. WMC, using technique a), is the number of methods in a class: SalesLineItem 2 ProductSpecification 4 Sale 6 3 marks 4 marks 3. LCOM, using technique a) for each attribute calculate: #methods using the class number of attributes then calculate the average of those values; convert the average to a percentage; subtract that from 100: SalesLineItem (two methods and two attributes) average of 2/2 and 2/2 is 1 ==> 100% ==> 100-100 = 0 ProductSpecification(four methods and three attributes) average of 2/4, 2/4, and 2/4 is 0.5 ==> 50% ==> 100-50 = 50

  3. 91.3913 Assignment 4 Answers April 5, 2002 16 marks 4. An O-R mapping: Class Maps to Relation Sale Sale SalesLineItem SalesLineItem ProductSpecification ProductSpecification Association Maps to Relation/FKey contains FK in SalesLineItem (refers to Sale) describes FK in SalesLineItem (refers to ProductSpecification)

  4. 91.3913 Assignment 4 Answers April 5, 2002 Relational Schema Sale sOID date isComplete ... SalesLineItem slOID quantity sOID pOID ProductSpecification pOID description price itemID

  5. 91.3913 Assignment 4 Answers April 5, 2002 Sale Rows: sOID date isComplete ... 111 4/5/2002 false ... SalesLineItem slOID quantity sOID pOID 667 1 111 195 875 2 111 195 ProductSpecification pOID description price itemID 195 Product 1 $2..50 1

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