试题71

       Most operating systems have a standard set of（）to handle the processing of all input and output instructions.

       A.spreadsheet  B.control instructions

       C.I/O operation D.data table

       试题72

       （）is used to model aggregates of information and the relationships these aggregates have to other.

       A.Data flow diagram B.Entity relationship diagram

       C.Sequence diagram D.Structure diagram

       试题73

       In software engineering the design phase is divided into（）。

       A.system design and detailed design

       B.computer design and program design

       C.system design and hardware design

       D.computer design and detailed design

       试题74

       （）must be between on-line deployment and final acceptance.

       A.Detailed design B.Test run

       C.Internal testing D.Contract signing

       试题75

       The difference value between Budgeted Cost for work Performed and Actual Cost for Work Performed is（）.

       A.Cost Variance B.Schedule Variance

       C.Earned Value D.Cost Performed Index