Give an example of a schedule that is acceptable (without any delays caused by locks) by an immediate-update pessimistic strict two-phase locking concurrency control, while an optimistic concurrency control restarts one of the transactions.
What will be an ideal response?
r1(x) r2(x) r2(x) w2(y) commit2 r1(y) w1(z )request to commit1
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To open the Report Wizard, you click the Report Wizard button in the:
A) Reports group on the Create tab. B) Reports group on the Design tab. C) Other group on the Design tab. D) Other group on the Create tab.
?_____ describes how instances of one class relate to instances of another class.
A. ?A modifier B. ?A deliverable C. ?Scope D. ?Cardinality
You are an IT consultant, and you are asked to create a new system for a small real estate brokerage firm. Your only experience is with traditional data and process modeling techniques. This time, you decide to try an object-oriented approach. How will you begin? How are the tasks different from traditional structured analysis?
What will be an ideal response?
b. Require the scope resolution operator only when being defined outside of the definition of their class.
a. Only to the current value being displayed. b. Only to outputs displayed in the current statement. c. Until explicitly set to a different setting. d. Until the output buffer is flushed.