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NEW QUESTION: 1
A developer wants to create an enterprise bean that uses the EJB Timer service.
Which two are true? (Choose two.)
A. The enterprise bean must implement the TimedObject interface.
B. Once created, the timer will survive a container crash.
C. Once created, a timer cannot be canceled.
D. The developer can use either a message-driven bean, stateless session bean, or stateful session bean.
E. The bean can be used within a transaction.
Answer: B,E
Explanation:
Explanation/Reference:
B: An enterprise bean usually creates a timer within a transaction. If this transaction is rolled back, the timer creation also is rolled back. Similarly, if a bean cancels a timer within a transaction that gets rolled back, the timer cancellation is rolled back.
C: Timers are persistent by default. If the server is shut down or crashes, persistent timers are saved and will become active again when the server is restarted. If a persistent timer expires while the server is down, the container will call the @Timeout method when the server is restarted.
Incorrect answers:
A: Timers can be cancelled by the following events.
* When a single-event timer expires, the EJB container calls the associated timeout method and then cancels the timer.
* When the bean invokes the cancel method of the Timer interface, the container cancels the timer.
Reference: The Java EE 6Tutorial. PartNo: 821- Transactions andTimers

NEW QUESTION: 2
A company uses Azure to host virtual machines (VMs) and web apps. You need to ensure that you can configure a schedule to scale app services. How should you configure the app service?
A. Set the scale by metric setting to Queue.
B. Set the scale up by instances setting to 5.
C. Set the scale by metric setting to None.
D. Set the scale down by instances setting to 5.
E. Ensure that linked resources are also scaled.
Answer: A
Explanation:
Explanation: The Automatic scale - Queue mode automatically scales if the number of messages in a queue goes above or below a specified threshold. Role instances are created or deleted when this happens.

NEW QUESTION: 3
Examine the following block that executes a SQL Performance Analyzer task:
begin dbms_sqlpa.execute_analysis_task(task_name => 'SPA_SKD4', execution_type => 'TEST
EXECUTE',
execution_name => 'before');
end;
Which two statements are true about the execution? (Choose two.)
A. The test plans are generated and added to plan baseline.
B. The test plans are executed, but not generated if they are available in the plan baseline.
C. It executes only the query part of the DML statements.
D. It generates execution plans and execution statistics.
Answer: C,D