In order for logical logging to work, a logical database operation must have a logical inverse operation. Give an example of a database operation that has no inverse. Suggest a procedure involving logical logging that can handle this case.
What will be an ideal response?
An operation that changes an item x to f (x), where f () is some function with no know n inverse (such as x := 5) is an example. A combination of physical and logical logging can be used. Physical logging is used for operations that have no inverse, logical logging is used for others. Each update record identifies the type of undo/redo that it uses.
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The public section of a class is also referred to as the _________________.
A. class interface B. maintenance area C. data member section D. class implementation
What other ways could Wireshark be used in a production network?
What will be an ideal response?
One way to access Word commands is to use:
A) files and folders. B) the Title bar. C) buttons and icons. D) the internet.
You can display a menu of available colors for text by clicking the ____________________ button arrow on the Common toolbar, as shown in the accompanying figure.
Fill in the blank(s) with the appropriate word(s).