多项选择题

Which two changes， taken together， would guarantee the ……

Which two changes， taken together， would guarantee the output： 1， 2， 3， 4， 5？（）

A.move the line 12 print statement into the foo（） method
B.change line 7 to public synchronized void go（）{
C.change the variable declaration on line 2 to private volatile int x；
D.wrap the code inside the foo（） method with a synchronized（this） block
E.wrap the for loop code inside the go（） method with a synchronized block synchronized（this）{//for loop code here}

<上一题目录下一题>

热门试题

多项选择题Whichthreewillcompileandrunwithoutexception？（）

A.private synchronized Object o；
B.void go（）{ synchronized（）{/* code here */}
C.public synchronized void go（）{/* code here */}
D.private synchronized（this） void go（）{/* code here */}
E.void go（）{ synchronized（Object.class）{/* code here */}
F.void go（）{ Object o = new Object（）； synchronized（o）{/* code here */}

单项选择题What can be a result？（）

A.Compilation fails.
B.An exception is thrown at runtime.
C.The code executes and prints "StartedComplete".
D.The code executes and prints "StartedComplete0123".
E.The code executes and prints "Started0123Complete".

多项选择题Whichtwoof statementsaretrue？（）

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.

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