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NEW QUESTION: 1
You are developing an application that will use multiple asynchronous tasks to optimize performance.
You create three tasks by using the following code segment. (Line numbers are included for reference only.)

You need to ensure that the ProcessTasks() method waits until all three tasks complete before continuing.
Which code segment should you insert at line 09?
A. tasks.WaitForCompletion();
B. tasks.Yield();
C. Task.WaitFor(3);
D. Task.WaitAll(tasks);
Answer: D
Explanation:
Explanation: The Task.WaitAll method (Task[]) waits for all of the provided Task objects to complete execution.
Example:
// Construct started tasks
Task<int>[] tasks = new Task<int>[n];
for (int i = 0; i < n; i++)
{
tasks[i] = Task<int>.Factory.StartNew(action, i);
}
// Exceptions thrown by tasks will be propagated to the main thread
// while it waits for the tasks. The actual exceptions will be wrapped in AggregateException.
try
{
// Wait for all the tasks to finish.
Task.WaitAll(tasks);
// We should never get to this point
Console.WriteLine("WaitAll() has not thrown exceptions. THIS WAS NOT EXPECTED.");
}
Reference: Task.WaitAll Method (Task[])
https://msdn.microsoft.com/en-us/library/dd270695(v=vs.110).aspx

NEW QUESTION: 2
Drag and drop the descriptions of performing an initial device configuration from the left onto the correct features or compnents on the right.

Answer:
Explanation:

Explanation

NEW QUESTION: 3


Answer:
Explanation:

Explanation

References:

NEW QUESTION: 4
When is the UNDO_RETENTION parameter value ignored by a transaction?
A. when the data file of the undo tablespace is autoextensible
B. when the undo tablespace is of a fixed size and retention guarantee is not enabled
C. when Flashback Database is enabled
D. when there are multiple undotablespaces available in a database
Answer: B
Explanation:
Reference:http://docs.oracle.com/cd/B19306_01/server.102/b14231/undo.htm(undo retention, see the bullets)