多项选择题

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.

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单项选择题What is the result？（）

A.Compilation fails.
B.An exception is thrown at runtime.
C.The code executes normally and prints "foo"；
D.The code executes normally， but nothing is printed.

单项选择题Which statement is true？（）

A.The output could be 5-1，6-1，6-2，5-2
B.The output could be 6-1，6-2，5-1，5-2
C.The output could be 6-1，5-2，6-2，5-1
D.The output could be 6-1，6-2，5-1，7-1

单项选择题What is the output if the main() method is run？（）

A.4
B.5
C.8
D.9
E.Compilation fails.
F.An exception is thrown at runhime.
G.It is impossible to determine for certain.

单项选择题Which statement is true？（）

A.This code can throw an InterruptedException.
B.This code can throw an IllegalMonitorStateException.
C.This code can throw a TimeoutException after ten minutes.
D.Reversing the order of obj.wait（） and obj.notify（） might cause this method to complete normally.
E.A call to notify（） or notifyAll（） from another thread might cause this method to complete normally.
F.This code does NOT compile unless "obj.wait（）" is replaced with "（（Thread） obj）.wait（）".

多项选择题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.