Which of the following is not a valid number format?
A. $1,000.00
B. 
C. (1,000.00)
D. 
Answer: D
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A blind write occurs when a transaction writes a database item it has not read. For example, in the Student Registration System a transaction might compute a student’s GPA by reading her course grades, computing the average, and then (blindly) writing the result in the appropriate database item without first reading that item. Some applications have the property that no transactions perform blind writes. Show that for such applications
a. Viewequivalence is equivalent to conflict equivalence. b. The timestamp-ordered concurrency control described in Section 20.9.1 never uses the Thomas Write Rule. c. In the timestamp-ordered concurrency control described in the text, for each item, x, that a transaction, T, w rites, w hen T commits, rt(x) = wt(x) = TS(T).
Which of the following is not true regarding the question-and-answer portion of your presentation?
A) As an audience member asks a question, make eye contact and listen to the full question. B) It is acceptable to end your presentation with "Are there any questions?" C) Make the assumption that people in the audience will have questions. D) Be honest and sincere in your reply, and try to involve the whole audience with your response.
What status indicates that a connection has made a graceful closure?
A. open port B. time_wait C. close_wait D. listening port
What kind of method might be most useful during program debugging?
a. return the bottom element of the stack b. display the contents of the whole stack c. sort the items in the stack d. reverse the order of the items in the stack