多选题Which two statements are true?（）AIt is possible for more than two threads to deadlock at once.BThe JVM implementation guarantees that multiple threads cannot enter into a deadlocked state.CDeadlocked threads release once their sleep() method's sleep du

第1题：

public class Threads2 implements Runnable {  public void nun（） {  System.out.println（”run.”）；  throw new RuntimeException（”Problem”）；  }  public static void main（String[] args） {  Thread t = new Thread（new Threads2（））；  t.start（）；  System.out.println（”End of method.”）；  }  }  Which two can be results？（）

• A、 java.lang.RuntimeException： Problem
• B、 run.    java.lang.RuntimeException： Problem
• C、 End of method.    java.lang.RuntimeException： Problem
• D、 End of method.      run.      java.lang.RuntimeException： Problem
• E、 run.    java.lang.RuntimeException： Problem     End of method.

第2题：

Which of the following best describes Simultaneous Multi-threading （SMT）？（）

• A、A POWER5 microprocessor feature that allocates two processors to each application
• B、A Workload Manager feature that allows two processing threads to be executing on a single processor
• C、An AIX v5.2 feature that allows two processing threads to be executing on a single processor concurrently
• D、A POWER5 microprocessor feature that allows two processing threads to be executing on a single processor concurrently

第3题：

Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object？（）

• A、When using versions of Java technology earlier than 5.0.
• B、When sharing a StringBuffer among multiple threads.
• C、When using the java.io class StringBufferInputStream.
• D、When you plan to reuse the StringBuffer to build more than one string.

第4题：

Which two statements are true?（）

• A、It is possible for more than two threads to deadlock at once.
• B、The JVM implementation guarantees that multiple threads cannot enter into a deadlocked state.
• C、Deadlocked threads release once their sleep() method's sleep duration has expired.
• D、Deadlocking can occur only when the wait(), notify(), and notifyAll() methods are used incorrectly.
• E、It is possible for a single-threaded application to deadlock if synchronized blocks are used incorrectly.
• F、If a piece of code is capable of deadlocking, you cannot eliminate the possibility of deadlocking by inserting invocations of Thread.yield().

第5题：

Which statement is true？（）

• A、A class’s finalize（） method CANNOT be invoked explicitly.
• B、super.finalize（） is called implicitly by any overriding finalize（） method.
• C、The finalize（） method for a given object is called no more than once by the garbage collector.
• D、The order in which finalize（） is called on two objects is based on the order in which the two objects became finalizable.

第6题：

Which of the following BEST describes the function of hyperthreading support within a CPU?（）

• A、Allows the core to create a separate space to process threads
• B、Allows the processor to handle multiple threads per core
• C、Allows the core to shift to a higher clock speed based on thread count
• D、Allows the processor to reject certain threads to increase performance

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第13题：

Which two of statements are true？（）

• A、It is possible to synchronize static methods.
• B、When a thread has yielded as a result of yield（）， it releases its locks.
• C、When a thread is sleeping as a result of sleep（）， it releases its locks.
• D、The Object.wait（） method can be invoked only from a synchronized context.
• E、The Thread.sleep（） method can be invoked only from a synchronized context.
• F、When the thread scheduler receives a notify（） request， and notifies a thread， that thread immediately releases its lock.

第14题：

Which two statements are true about hierarchical architecture? （）(Choose two.)

• A、You can assign a logical interface to multiple zones.
• B、You cannot assign a logical interface to multiple zones.
• C、You can assign a logical interface to multiple routing instances.
• D、You cannot assign a logical interface to multiple routing instances.

第15题：

Which two statements are true？（）

• A、It is possible for more than two threads to deadlock at once.
• B、The JVM implementation guarantees that multiple threads cannot enter into a deadlocked state.
• C、Deadlocked threads release once their sleep（） method’s sleep duration has expired.
• D、Deadlocking can occur only when the wait（）， notify（）， and notifyAll（） methods are used incorrectly.
• E、It is possible for a single-threaded application to deadlock if synchronized blocks are used incorrectly.
• F、If a piece of code is capable of deadlocking， you cannot eliminate the possibility ofdeadlocking by insertinginvocations of Thread.yield（）.

第16题：

Which two statements are true regarding transactions in an Oracle database（）

• A、Multiple transactions can use the same undo segment.
• B、A transaction is assigned an undo segment when it is started.
• C、More than one transaction cannot share the same extent in the undo tablespace.
• D、The transactions use system undo segment to store undo data if all the segments in the undo tablespaceare used.

第17题：

Your application uses two threads， named threadOne and threadTwo. You need to modify the code to prevent the execution of threadOne until threadTwo completes execution. What should you do？（）

• A、 Configure threadOne to run at a lower priority.
• B、 Configure threadTwo to run at a higher priority.
• C、 Use a WaitCallback delegate to synchronize the threads.
• D、 Call the Sleep method of threadOne. 
• E、 Call the SpinLock method of threadOne.

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