Consider the recovery aspects of the nested transactions . Assume that a withdraw transaction will abort if the account will be overdrawn and that in this case the parent transaction will also abort. Describe serially equivalent interleavings of T1, T2, U1 and U2 with the following properties:
What will be an ideal response?
If a child transaction’s abort can cause the parent to abort, with the effect that the other children abort, then strict executions must delay reads and writes until all the relations (siblings and ancestors) of transactions that have previously written the same objects are either committed or aborted. Our deposit and withdraw operations read and then write the balances.
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Which of the following statements is false?
a. An import statement of the following form enables you to use a module’s definitions via the module’s name and a dot (.): import math b. The following snippet calculates the square root of 900 by calling the math module’s sqrt function, which returns its result as a float value: math.sqrt(900) c. The following snippet calculates the absolute value of -10 by calling the math module’s fabs function, which returns its result as a float value: math.fabs(-10) d. The value of the expression floor(–3.14159) is –3.0.
Answer the following statement(s) true (T) or false (F)
1. Once a drawing object is converted to a shape, it is as if you had originally drawn the object in object drawing mode rather than in merge mode. 2. Because strokes drawn in merge mode are treated as segments based on where they overlap, it is easy to trim off any overlapping ends. 3. Even a transparent shape contains pixels. 4. Overlapped shapes do not merge or create holes until the shape is deselected. 5. To rearrange the stacking order of layers, drag them up or down in the Timeline.
The debugger is loaded by starting the Ruby interpreter with the -debug run option.
Answer the following statement true (T) or false (F)
Which BGP neighbor state indicates that a TCP connection has been completed but no BGP messages have been sent yet?
A) Connect B) OpenSent C) Active D) Established