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單項選擇題

Software（）focusesonthreeattributesoftheprogram：softwarearchitecture，datastructure，andproceduraldetail.

A.analysis
B.design
C.installation
D.upgrade

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單項選擇題

The（）schemeinadatabasesystemisresponsibleforthedetectionoffailuresandfortherestorationofthedatabasetoastatethatexistedbeforetheoccurrenceofthefailure.

A.query
B.test
C.check
D.recovery

單項選擇題

（）statementcanperformacalculationandstoretheresultinavariablesothatitcanbeusedlater.

A.Assignment
B.Control
C.I/O
D.Declaration