Explain why in a deferred-update system, the system does not first copy the intentions list into the database and then append the commit record to the log.
What will be an ideal response?
Because the intentions list and the update records do not contain before-images. If the system should crash after the database has been updated, but before the commit record has been appended to the log, there would be no way to roll the transaction back.
You might also like to view...
An organization's main assets consist of intellectual property rather than plants, buildings, or expensive computer hardware.
Answer the following statement true (T) or false (F)
All of the following are memory management methods of the ArrayList class except:
a. ensureCapacity() b. clear() c. isEmpty() d. trimToSize()
In PowerPoint, what happens when you open an Excel file from your Data Files location?
A. The presentation appears in Outline view and contains two panes. B. The presentation appears in Normal view and one large pane. C. The presentation appears in Normal view and contains three panes. D. The presentation appears in Outline view and contains two panes.
The operation for removing an item from the stack is called push.
Answer the following statement true (T) or false (F)