which of the following statements about JPA database transaction processing is false?
a. Transaction processing enables a program that interacts with a database to treat a set of operations as a single operation. Such an operation also is known as an atomic operation or a transaction.
b. At the end of a transaction, a decision can be made either to commit the transaction or roll back the transaction.
c. Committing a transaction finalizes the database operation(s); all insertions, updates and deletions performed as part of the transaction cannot be reversed.
d. Rolling back the transaction leaves the database in its state prior to the data-base operation. This is useful when a portion of a transaction fails to complete properly.
C
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A. HOME B. OPTION-LEFT ARROW C. COMMAND-OPTION-LEFT ARROW D. COMMAND-LEFT ARROW
Which of the following devices is the computer hardware that records and/or retrieves items to and from a flash drive or external hard drive, for example?
A. concatenation B. indexed C. resolved D. storage
The _____ allows an expert system user to understand how the system arrived at its results.
A. inference engine B. knowledge base C. explanation facility D. knowledge acquisition facility
EX Case 6-1Natalie works for an environmental agency and is gathering data on recycling rates for an upcoming conference. In her spreadsheet, she wants to insert several pictures to illustrate her data. To align, group, or rotate the picture, Natalie would select the image, click the Picture Tools Format tab, then click one of those options in the ____ group.
A. Adjust B. Picture Styles C. Arrange D. Size